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Soil solarisation delivers near zero levels of Fusarium pseudograminearum in cereal crown rot reference sites 土壤日晒可使谷物冠腐病参照地的假镰刀菌含量接近于零
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-13 DOI: 10.1016/j.cropro.2024.106887
{"title":"Soil solarisation delivers near zero levels of Fusarium pseudograminearum in cereal crown rot reference sites","authors":"","doi":"10.1016/j.cropro.2024.106887","DOIUrl":"10.1016/j.cropro.2024.106887","url":null,"abstract":"<div><p>The development of commercial varieties that are resistant or tolerant to crown rot caused by <em>Fusarium</em> species is an important goal for cereal breeding programs internationally. Ideally, this research requires experimental sites that are initially free from <em>Fusarium</em> in order to establish treatment plots that compare growth in the presence and absence of these soil- and stubble-borne pathogens. Specifically, the assessment of tolerance requires control plots free of disease to determine the reduction in crop yield in plots where the disease is present. The ability of soil solarisation to reduce the background <em>Fusarium pseudograminearum</em> level occurring at experimental sites in comparison to current stubble management techniques was investigated across three field trials at Wellcamp in Queensland. Stubble from a susceptible durum (<em>Triticum turgidum</em> ssp<em>. durum</em>) cultivar inoculated with <em>F. pseudograminearum</em> was incorporated by cultivation into the trial sites to establish a significant background level of inoculum prior to the application of all subsequent treatment plots. In these trials, solarisation over a period of twelve weeks reduced the presence of <em>F. pseudograminearum</em> to low detection levels when compared to the traditional crown rot management techniques of cultivation or growth of the non-host cover crops mungbean (<em>Vigna radiata</em>) and soybean (<em>Glycine max</em>). No negative effects of solarisation were observed on a subsequent crop of bread wheat (<em>Triticum aestivum</em>), with significantly higher yields observed in the solarised treatments. Solarisation has the potential to deliver near zero level crown rot reference sites for experimental purposes in one short application between cropping seasons.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0261219424003156/pdfft?md5=be3768733ffb512b03dfb564e71162a0&pid=1-s2.0-S0261219424003156-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141984789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic of Puccinia striiformis f. sp. tritici urediniospore and its correlation with wheat stripe rust epidemics in Xiangyang of China 中国襄阳小麦条锈病条斑赤霉病菌(Puccinia striiformis f. sp. tritici urediniospore)的动态及其与小麦条锈病流行的相关性
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-13 DOI: 10.1016/j.cropro.2024.106898
{"title":"Dynamic of Puccinia striiformis f. sp. tritici urediniospore and its correlation with wheat stripe rust epidemics in Xiangyang of China","authors":"","doi":"10.1016/j.cropro.2024.106898","DOIUrl":"10.1016/j.cropro.2024.106898","url":null,"abstract":"<div><p>Stripe rust is one of the main diseases of wheat, which seriously threatens wheat production and food security all over the world. Xiangyang located in the Northwest of Hubei province in China is one of the main winter propagation and spring epidemic regions of <em>Puccinia striiformis</em> f. sp. <em>tritici</em> (<em>Pst</em>), which can provide urediniospores to the major wheat-growing regions in eastern and northeastern China. Understanding the dynamic of <em>Pst</em> urediniospore is important for giving prediction of wheat stripe rust epidemic for eastern and northeastern China and controlling the epidemic of wheat stripe rust. In this study, spore trapper and TaqMan real-time quantitative PCR (TaqMan-qPCR) detection system were employed to monitor <em>Pst</em> urediniospore from December 2018 to December 2022 in Xiangyang. Weather variables including air temperature, relative humidity, sunshine duration and rainfall were collected to clarify the relationship with urediniospore density in the air. In addition, the relationship between disease index of wheat stripe rust and urediniospore density in the air was analyzed. Results showed that <em>Pst</em> urediniospore could be captured in the air all year round. The order of the density of urediniospore from most to least was from April to June, October to December, January to March, and July to September except 2022. The urediniospore density reached the peak when the air temperature was 10–22 °C and the relative humidity was 70%∼85% from April to May in 2019, 2020 and 2021. The density of <em>Pst</em> urediniospores from February to April was linearly related to the total precipitation of 25 days prior to the final day of a 7-day trapping period. There was a significant positive correlation between the disease index of wheat stripe rust and the cumulative urediniospore density 2–4 weeks before the investigation date of wheat stripe rust from March to May (<em>P</em> &lt; 0.05). There was no significant correlation between the disease index and the cumulative urediniospore density from 1–4 weeks after the investigation date of stripe rust from March to May (<em>P</em> &gt; 0.05). This study laid a foundation for the establishment of wheat stripe rust prediction model based on urediniospore density and meteorological factors.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141990641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolation and identification of Cladosporium tenuissimum causing leaf blight on garden pea (Pisum sativum L.) in Telangana from southern India 印度南部 Telangana 地区导致园豌豆(Pisum sativum L.)叶枯病的 Cladosporium tenuissimum 的分离与鉴定
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-13 DOI: 10.1016/j.cropro.2024.106891
{"title":"Isolation and identification of Cladosporium tenuissimum causing leaf blight on garden pea (Pisum sativum L.) in Telangana from southern India","authors":"","doi":"10.1016/j.cropro.2024.106891","DOIUrl":"10.1016/j.cropro.2024.106891","url":null,"abstract":"<div><p>Garden pea (<em>Pisum sativum</em> L.), is an important legume grown worldwide as a source of proteins and carbohydrates. Since pea crop is cultivated globally in cool temperate climatic conditions, increasing temperatures accompanied by high humidity favors fungal infections. A fungal infection causing leaf blight symptoms was frequently observed on the leaves of pea plants grown in greenhouse and field conditions. The blight symptoms showed a water-soaked and wilting appearance with curly leaf edges accompanied by greyish mycelial growth and chlorotic lesions. The disease incidence in field conditions ranged between 5 and 10 %, whereas in the controlled greenhouse conditions, it ranged from 40 to 45%. Two isolates of the fungus, Gp03 and Gp04 were isolated from Arkel pea leaves and purified from a single conidium each. According to Koch's postulates, the pathogenicity tests with these isolates using detached leaf assay and whole plant leaf assays confirmed the pathogen. Morphological and molecular analysis of nucleotide sequences of the D1-D2 region, translation elongation factor-1α (<em>TEF</em>) and actin (<em>ACT</em>) genes confirmed these isolates as members of the genus, <em>Cladosporium</em>. The phylogenetic relatedness of these isolates with other members of the <em>Cladosporium</em> genus revealed them as fungal strains of <em>Cladosporium tenuissimum</em>. Further, these isolates were also confirmed as <em>C. tenuissimum</em> by Microbial Type Culture Collection and Gene Bank (MTCC), Chandigarh in India, and provided the accession nos. MTCC 13581 and MTCC 13582 to the <em>C. tenuissimum</em> strains, Gp03 and Gp04 respectively. This is the first report of <em>Cladosporium tenuissimum</em> infecting garden pea in Telangana, India.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141990640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unraveling the impact of greenhouse pepper resistance on biological performance of the broad mite Polyphagotarsonemus latus (Acari: Tarsonemidae) 揭示温室辣椒抗性对宽螨Polyphagotarsonemus latus(Acari: Tarsonemidae)生物学表现的影响
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-13 DOI: 10.1016/j.cropro.2024.106899
{"title":"Unraveling the impact of greenhouse pepper resistance on biological performance of the broad mite Polyphagotarsonemus latus (Acari: Tarsonemidae)","authors":"","doi":"10.1016/j.cropro.2024.106899","DOIUrl":"10.1016/j.cropro.2024.106899","url":null,"abstract":"<div><p>The broad mite, <em>Polyphagotarsonemus latus</em> (Banks) (Acari: Tarsonemidae) is a highly significant pest in tropical and subtropical regions, with a wide host range that encompasses over 60 plant families. In particular, it can be a major and economically damaging pest on pepper plants, causing significant losses to the crop. The life table parameters of <em>P. latus</em> were determined under laboratory conditions to evaluate the susceptible and resistant cultivars of greenhouse pepper among 14 pepper cultivars, including Selva, Clavesol, Kamus, Chidem, Sympathy, Sven, Kamro, Lumos, Caoba, Bellisa, Sunset, Atlantic D90, Atlantic G50, and Atlantic P5001. The total pre-adult period was significantly different on the pepper cultivars tested, in which the shortest and longest duration was recorded on Atlantic P5001 (5.02 days) and Atlantic G50 (5.94 days), respectively. Adult longevity and total life span had significant differences among pepper cultivars, in which the longest durations were observed on Kamus (21.02 and 26.36 days, respectively). The population growth parameters, including the gross reproductive rate (<em>GRR</em>), net reproductive rate (<em>R</em><sub>0</sub>), intrinsic rate of increase (<em>r</em>), finite rate of increase (<em>λ</em>), and mean generation time (<em>T</em>), as well as the fecundity of the broad mite exhibited significant differences among the cultivars tested. Specifically, the maximum and minimum values of the intrinsic rate of increase (<em>r</em>) were observed in Lomus (0.319 day<sup>−1</sup>) and Sunset (0.242 day<sup>−1</sup>), respectively. The gross reproductive rate (28.33 eggs/individual) and net reproductive rate (27.18 eggs/individual) in the Kamus cultivar were significantly higher than those in the other cultivars. Our results indicated that among the pepper cultivars, Sunset, Sympathy, Chidem, and Clavesol were more resistant to <em>P</em>. <em>latus</em> compared with the others.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the effectiveness of selected reduced-risk insecticides and malathion on blueberry gall midge (Diptera: Cecidomyiidae) and key parasitoids 评估选定的低风险杀虫剂和马拉硫磷对蓝莓瘿蚊(双翅目:瘿蚊科)和主要寄生虫的效果
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-12 DOI: 10.1016/j.cropro.2024.106890
{"title":"Assessing the effectiveness of selected reduced-risk insecticides and malathion on blueberry gall midge (Diptera: Cecidomyiidae) and key parasitoids","authors":"","doi":"10.1016/j.cropro.2024.106890","DOIUrl":"10.1016/j.cropro.2024.106890","url":null,"abstract":"<div><p>The blueberry gall midge, <em>Dasineura oxycoccana</em>, is a major blueberry pest in Florida and North America, primarily controlled with insecticides. However, their efficacy on <em>D. oxycoccana</em> and impact on natural enemies are poorly documented. We compared the effects of seven reduced-risk insecticides with malathion on larval and adult <em>D. oxycoccana</em> in laboratory bioassays. Acetamiprid showed the highest larval mortality, similar to malathion. Imidacloprid was effective after 2 h, while spirotetramat was effective after 3 h. On adults, cyantraniliprole and acetamiprid were as effective as malathion. Flupyradifurone began showing comparable lethality at 3 h, while spirotetramat, imidacloprid, and tolfenpyrad began inducing comparable mortality 6 h post-application. The same insecticides were evaluated for their effects on <em>D. oxycoccana</em> and their key parasitoids in two southern highbush blueberry plantings in North-central and Central Florida. A wetter-spreader adjuvant was added to spirotetramat as a ninth treatment. Spirotetramat + adjuvant effectively reduced adults and larval densities by up to 100% in the first year and adults by 59% and larvae by 56% in the second year. Acetamiprid reduced adult densities by 65% in 2019. Spinetoram reduced adults by 77% and larvae by 100% in 2019, while flupyradifurone reduced adults by 77% and larvae by 37% in 2020. These insecticides had minimal adverse effects on <em>Platygaster</em> spp. and overall parasitoid densities for both years. Based on these findings, there is potential for incorporating spirotetramat + adjuvant, flupyradifurone, spinetoram, or acetamiprid into a strategic rotational program with minimal impacts on natural enemies of <em>D. oxycoccana</em>.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141984883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the effect of provitamin a on maize field resistance to aflatoxin and fumonisin contamination 评估维生素 a 对玉米田抗黄曲霉毒素和伏马菌素污染的影响
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-11 DOI: 10.1016/j.cropro.2024.106892
{"title":"Assessing the effect of provitamin a on maize field resistance to aflatoxin and fumonisin contamination","authors":"","doi":"10.1016/j.cropro.2024.106892","DOIUrl":"10.1016/j.cropro.2024.106892","url":null,"abstract":"<div><p>Vitamin A deficiency in sub-Saharan Africa is mainly being addressed through crop biofortification. Several high provitamin A (PVA) maize varieties have been released as part of these measures. However, these varieties are grown in areas where <em>Aspergillus</em> ear rot (AER) and <em>Fusarium</em> ear rot (FER) frequently occur, leading to contamination with mycotoxins, which in turn reduce the yield and grain quality. Chronic mycotoxin exposure leads to serious public health problems. Therefore, PVA maize varieties should be resistant to mycotoxin contamination. In a previous study, we generated 120 PVA hybrids by crossing 60 PVA inbreds and two testers with contrasting PVA content. Several inbreds resistant to aflatoxin were detected through laboratory-based kernel screening assays. In the current study, 21 PVA inbred lines with varying carotenoid content inoculated with toxigenic isolates of <em>A. flavus</em> and <em>F. verticillioides</em> were evaluated in field trials conducted at two locations in Nigeria for resistance to ear rots and mycotoxin production. Inbred lines resistant to AER, FER, aflatoxin and fumonisin contamination were identified. High PVA inbred lines were less susceptible to the ear rots, aflatoxin, and fumonisin than those with low PVA content. There were negative correlations between PVA content and each of AER (<em>r</em> = −0.28, <em>P</em> &lt; 0.0001), FER (<em>r</em> = −0.37, <em>P</em> &lt; 0.0001), aflatoxin (<em>r</em> = −0.15, <em>P</em> &lt; 0.05), and fumonisin (<em>r</em> = −0.27, <em>P</em> &lt; 0.0001). Three promising inbred lines were resistant to both aflatoxin and fumonisin. Moreover, the inbred TZI1715 combined resistance to AER, FER, aflatoxin, and fumonisin with desirable general combining ability for high β-carotene and total PVA content. These results suggest that the PVA biofortified maize developed to address vitamin A deficiency can also contribute to reduced exposure to aflatoxin and fumonisin.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of florpyrauxifen-benzyl in water-seeded rice systems as affected by application timing 评估水稻水播系统中氟啶脲苄酯受施用时间的影响
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-10 DOI: 10.1016/j.cropro.2024.106886
{"title":"Assessment of florpyrauxifen-benzyl in water-seeded rice systems as affected by application timing","authors":"","doi":"10.1016/j.cropro.2024.106886","DOIUrl":"10.1016/j.cropro.2024.106886","url":null,"abstract":"<div><p>Florpyrauxifen-benzyl (FPB) is a novel auxin mimic rice herbicide used to control selected grasses, sedges, and broadleaves. Field experiments were conducted in 2020–2022 to 1) characterize the effects of FPB on rice crop safety and weed control when applied alone or in a mixture, 2) determine the FPB application timing to optimize smallflower umbrella sedge (SMF) control, and 3) evaluate the effect of late season application on rice flower sterility. In the first study, FPB was applied alone at 15, 30, and 60 g ai ha<sup>−1</sup> and in mixture with bispyribac-sodium, penoxsulam, and propanil. FPB applied alone at 30 g ha<sup>−1</sup> at 4–5-leaf (LF) rice stage controlled more than 80% of watergrasses, ricefield bulrush, and SMF and more than 99% of all broadleaf weeds at 28 days after treatment (DAT). The mixture treatments of FPB plus bispyribac-sodium applied at maximum use rate had the greatest grass weed control whereas, FPB plus propanil at the maximum use rate provided the greatest sedge control. In the second study, FPB at 40 g ha<sup>−1</sup> was applied at 1-LF, 10-, 15-, 20-, and 25-cm tall SMF, where treatments controlled 95%, 86%, 89%, 87%, and 85% of SMF at 42 DAT, respectively. In the third study, FPB at 40 and 80 g ha<sup>−1</sup> rate was applied at rice panicle initiation (PI) and 50% flowering (FL) growth stages. While the weed control was more than 90% at 42 DAT for all applications, the FL stage application caused 26% and 35% rice panicle blanking at 40 and 80 g ha<sup>−1</sup> rate, respectively. This research suggests, the window of FPB application should be from 2-LF rice to rice PI stage to ensure crop safety and highest weed control.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141984881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chitinolytic microorganisms for biological control of plant pathogens: A Comprehensive review and meta-analysis 用于植物病原体生物防治的甲壳素分解微生物:综合综述与荟萃分析
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-10 DOI: 10.1016/j.cropro.2024.106888
{"title":"Chitinolytic microorganisms for biological control of plant pathogens: A Comprehensive review and meta-analysis","authors":"","doi":"10.1016/j.cropro.2024.106888","DOIUrl":"10.1016/j.cropro.2024.106888","url":null,"abstract":"<div><p>Large-scale application of chemical pesticides and insecticides over the years have led to resistance to these chemicals, along with a reduction in crop yield, increase in production cost as well as adverse effects on the environment and human health. In this scenario, there is a need to implement some other techniques to prevent crop losses due to pests and other pathogens. Biological control seems to be a plausible approach to remedy this situation and practice sustainable agriculture through integrated pest management. A feasible way to control nematodes, insects and fungal pathogens can be through the use of chitinase-producing microorganisms. Chitin makes up the exoskeleton of insects, cell wall of fungi, and eggshells of nematodes. Chitinase-producing microorganisms can extensively damage and even kill the pathogens. Therefore, chitinolytic bacteria and fungi might be potential candidates for the biocontrol of numerous plant pathogens. In this review, we aim to discuss the available literature on chitin degrading microorganisms, chitinase enzymes and their importance in biological control. A meta-analysis has been performed with data from the last 2 decades to assess the efficacy of different microbial chitinases on biocontrol of pathogens and a forest plot was produced to conclude the variations among different studies performed so far.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neocamarosporium betae causing leaf spot and stem necrosis disease on Chenopodium quinoa in Shanxi Province, China 引起中国山西省藜麦叶斑病和茎坏死病的 betae 新赤霉病菌
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-10 DOI: 10.1016/j.cropro.2024.106889
{"title":"Neocamarosporium betae causing leaf spot and stem necrosis disease on Chenopodium quinoa in Shanxi Province, China","authors":"","doi":"10.1016/j.cropro.2024.106889","DOIUrl":"10.1016/j.cropro.2024.106889","url":null,"abstract":"<div><p>Quinoa (Chenopodium quinoa) is a pseudocereal crop, and has been widely cultivated in China with excellent sources of nutrients, amino acids, and vitamins. During the inflorescence emergence stage to the grain-filling stage, Neocamarosporium betae leaf spot and stem necrosis of quinoa (NLSQ) as a new emerging disease was observed in Shanxi Province of China. NLSQ usually infected the leaves and then gradually spread towards to the stems. Typical symptoms included tan to brown lesions and with many black pycnidia, leading to lodging, leaf abscission, and grain unfilling. Based on morphological characteristics, phylogenetic analyses, and pathogenicity tests, the pathogen was identified as N. betae. The morphological characterizations of N. betae from quinoa were pycnidial conidiomata, hyaline conidiogenous cell, and smooth hyaline aseptate conidia. At 2–6 days postinoculation, the typical symptoms induced by inoculations of N. betae on leaves and stems of quinoa. To our knowledge, this study firstly reported that N. betae was the pathogen of NLSQ in China. The findings of this current study will contribute to developing the disease diagnosis and management.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calcium chloride seed priming: A dual-action strategy for enhancing Cyrtorhinus lividipennis attraction and deterring brown planthopper infestations in rice 氯化钙种子处理:提高水稻对红蜘蛛的吸引力和遏制褐飞虱侵扰的双重策略
IF 2.5 2区 农林科学
Crop Protection Pub Date : 2024-08-06 DOI: 10.1016/j.cropro.2024.106879
{"title":"Calcium chloride seed priming: A dual-action strategy for enhancing Cyrtorhinus lividipennis attraction and deterring brown planthopper infestations in rice","authors":"","doi":"10.1016/j.cropro.2024.106879","DOIUrl":"10.1016/j.cropro.2024.106879","url":null,"abstract":"<div><p>This investigation assessed the impact of calcium chloride (CaCl<sub>2</sub>) seed priming on the direct and indirect defense mechanisms of rice (<em>Oryza</em> <em>sativa</em> L.) against the brown planthopper (BPH), <em>Nilaparvata</em> <em>lugens</em> (Stål). Our findings revealed that seeds primed with CaCl<sub>2</sub> significantly curtailed the survival and developmental rates of BPH nymphs and diminished the honeydew secretion by adult females. The feeding behaviour of BPH on CaCl<sub>2</sub>-pretreated rice showed an extended non-proboscis handling (np) duration, while the phloem ingestion time (N4-b) and xylem ingestion time (N5) were reduced. Additionally, BPH nymphs exhibited a marked preference for H<sub>2</sub>O-pretreated plants over CaCl<sub>2</sub>-primed ones for both feeding and oviposition. Conversely, the natural enemy <em>Cytorhinus</em> <em>lividipennis</em> displayed a heightened preference for preying on BPH nymphs and eggs on CaCl<sub>2</sub>-primed rice. The treatment with calcium led to an increased release of a diverse range of volatile compounds following BPH infestation, compared to H<sub>2</sub>O pretreatment. Notably, the volatiles Methyl salicylate and 1-octen-3-ol were identified as the most effective deterrents for BPH and attractants for <em>C.</em> <em>lividipennis</em>, respectively, highlighting their potential role in mediating plant-insect interactions.</p></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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