Crop Protection最新文献_第9页

Managing endemic huanglongbing in commercial citrus production through vascular delivery of oxytetracycline 通过血管输送土霉素管理柑桔生产中的黄龙病

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-16 DOI: 10.1016/j.cropro.2025.107250

Ute Albrecht , Caroline Tardivo , Gerardo Moreno , Jasmine de Freitas , Ariel Singerman , Anne Plotto , Jinhe Bai

{"title":"Managing endemic huanglongbing in commercial citrus production through vascular delivery of oxytetracycline","authors":"Ute Albrecht , Caroline Tardivo , Gerardo Moreno , Jasmine de Freitas , Ariel Singerman , Anne Plotto , Jinhe Bai","doi":"10.1016/j.cropro.2025.107250","DOIUrl":"10.1016/j.cropro.2025.107250","url":null,"abstract":"<div><div>The bacterial disease huanglongbing (HLB) is devastating citrus industries around the world. Recent studies have identified trunk injection of oxytetracycline (OTC) as an effective method to reduce pathogen titers and restore citrus tree health and productivity. Here we assess the efficacy of OTC injections to mitigate HLB in a commercial citrus orchard in Florida over two production cycles. Nine-year-old ‘Valencia’ orange (<em>Citrus sinensis</em>) trees were injected with two rates of OTC in May 2022 and 2023 using two different injection methods and compared against non-injected trees. Regardless of the method, OTC injection significantly improved fruit yield and juice quality. At the lower rate (0.55 g OTC/tree) fruit yield increased by up to 66 % in year 1 and 95 % in year 2. At the higher rate (1.1 g OTC/tree) fruit yield increased by up to 70 % in year 1 and 121 % in year 2. Significant increases were also measured for fruit size, fruit weight, juice color, and soluble solids, regardless of the OTC rate although the higher rate generally produced better results. OTC residues in the fruits collected at harvest were below the maximum allowed level, regardless of the rate. Leaf bacterial titers measured one year after each injection were not different between injected and non-injected trees, suggesting that reinfection occurred and that repeated injections are necessary to maintain the beneficial effects of this therapy. The economic analysis showed that the cumulative result of OTC treatments over two seasons is positive, denoting that their benefit outweighed their cost.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"195 ","pages":"Article 107250"},"PeriodicalIF":2.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854879","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

The aromatic plant essential oils and their hormetic effect on Rhyzopertha dominica (Coleoptera: Bostrichidae) 芳香植物精油及其对 Rhyzopertha dominica (Coleoptera: Bostrichidae) 的激素作用

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-14 DOI: 10.1016/j.cropro.2025.107235

Prangthip Parichanon , Roberta Ascrizzi , Maria Cristina Echeverría , Priscilla Farina , Ylenia Pieracci , Guido Flamini , Federica Semprucci , Loretta Guidi , Eleonora Grassi , Theodora Isavella Gogou , Sania Ortega-Andrade , Barbara Conti

{"title":"The aromatic plant essential oils and their hormetic effect on Rhyzopertha dominica (Coleoptera: Bostrichidae)","authors":"Prangthip Parichanon , Roberta Ascrizzi , Maria Cristina Echeverría , Priscilla Farina , Ylenia Pieracci , Guido Flamini , Federica Semprucci , Loretta Guidi , Eleonora Grassi , Theodora Isavella Gogou , Sania Ortega-Andrade , Barbara Conti","doi":"10.1016/j.cropro.2025.107235","DOIUrl":"10.1016/j.cropro.2025.107235","url":null,"abstract":"<div><div>Essential oils (EOs) are increasingly recognized as eco-friendly alternatives to synthetic pesticides due to their biodegradability and reduced risks to non-target species. This study investigates the bioactivity of 30 EOs on <em>Rhyzopertha dominica</em>, a major pest of stored grains, with a focus on their repellency and attractiveness across varying concentrations. The area preference method (APM) was used to evaluate EO bioactivity at concentrations ranging from 0.00064 to 0.064 μL cm<sup>−2</sup>. The results revealed strong repellent or attractive activity for certain EOs, while others exhibited concentration-dependent dual effects, acting as attractants at lower concentrations and repellents at higher ones. In addition, the bioactivity shown in the APM by nine selected EOs was compared to that obtained by testing the same EOs through a two-choice behavioral bioassay (TCB) at corresponding concentrations. At a 2 % EO concentration, the TCB results indicated significant repellent activity (<em>p</em> < 0.05) for lemon verbena, palo santo, matico, pumin, cinnamon, and anise, which exhibited the strongest effects. In contrast, nutmeg demonstrated significant attractive properties (<em>p</em> < 0.05). Black pepper and mandarin EOs displayed trends toward repellency and attractiveness, respectively. Both methods confirmed the bioactivity of the EOs against <em>R. dominica</em>. These results underscore the concentration-dependent hormetic effects of EOs on <em>R. dominica</em> and highlight the importance of precise optimization in pest management strategies for their application.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107235"},"PeriodicalIF":2.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828399","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

Evaluation of Fusarium ear rot and fumonisins in twenty Zambian maize genotypes 20个赞比亚玉米基因型穗腐镰刀菌和伏马菌素的鉴定

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-11 DOI: 10.1016/j.cropro.2025.107232

Doreen Malekano Chomba , Patrick Chiza Chikoti , Paul Walubita Kachapulula , Kenneth Kajarayekha M'siska , Altus Viljoen , Lindy Joy Rose PhD

{"title":"Evaluation of Fusarium ear rot and fumonisins in twenty Zambian maize genotypes","authors":"Doreen Malekano Chomba , Patrick Chiza Chikoti , Paul Walubita Kachapulula , Kenneth Kajarayekha M'siska , Altus Viljoen , Lindy Joy Rose PhD","doi":"10.1016/j.cropro.2025.107232","DOIUrl":"10.1016/j.cropro.2025.107232","url":null,"abstract":"<div><div>Fusarium ear rot (FER) of maize, caused by <em>Fusarium verticillioides</em>, significantly impacts grain quantity and quality due to reduced yield and grain discolorations. The fungus produces fumonisins (FUM), a mycotoxin associated with noxious effects on humans and animals. In 2019/20 and 2020/21 seasons, 20 maize genotypes were evaluated for tolerance to FER/FUM contamination in field experiments conducted at Mt. Makulu and Msekera Research Stations located in Chilanga and Chipata districts respectively. Maize (<em>Zea mays</em> L.) plants were artificially inoculated with characterised Zambian isolates of <em>F. verticillioides,</em> and FER disease symptoms visually assessed<em>.</em> The accumulation of FUM in grain was quantified by liquid chromatography tandem mass spectrometry. Commercial hybrids, ZM04 (8.4 %; 207.6 μg kg<sup>−1</sup>), ZM15 (14.7 %; 281.4 μg kg<sup>−1</sup>) and ZM07 (17.4 %, 374.2 μg kg<sup>−1</sup>) consistently accumulated significantly lower FER severity and FUM when compared to the resistant check ZM01 (19.2 %; 384.1 μg kg<sup>−1</sup>) over the two years. ZM04 and ZM07 reaction to FER and FUM was stable in both environments. This study has demonstrated that the Zambian germplasm can serve as a valuable source of resistance to FER. Therefore, information on the tolerant genotypes should be shared with small-scale farmers to enable them to make informed decisions regarding the best genotypes to grow.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"195 ","pages":"Article 107232"},"PeriodicalIF":2.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854878","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

Status and prospect of the application of UAV remote sensing technology in smart orchard management 无人机遥感技术在智慧果园管理中的应用现状与展望

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-11 DOI: 10.1016/j.cropro.2025.107240

Baoju Wang , Yu Yan , Jing Zhao , Rehana Kaousar , Yubin Lan

{"title":"Status and prospect of the application of UAV remote sensing technology in smart orchard management","authors":"Baoju Wang , Yu Yan , Jing Zhao , Rehana Kaousar , Yubin Lan","doi":"10.1016/j.cropro.2025.107240","DOIUrl":"10.1016/j.cropro.2025.107240","url":null,"abstract":"<div><div>During the entire growth cycle of fruit trees, it is essential to implement management practices, including pruning, irrigation, pest and disease control, and harvesting. However, traditional orchard management has largely depended on subjective judgment and growers' experience, often lacking scientific rigor and demanding considerable labor and time. Given the current labor shortages, there is an urgent need to advance orchard management through intelligent, digital, and automated systems, thereby reducing labor intensity, enhancing scientific decision-making, and improving farmers’ income. Timely and accurate acquisition of information on fruit tree growth is a prerequisite for implementing intelligent orchard management. Unmanned aerial vehicle (UAV) remote sensing has become an indispensable tool in orchard monitoring, offering significant advantages such as high cost-efficiency, operational flexibility, and strong adaptability to complex agricultural environments. This paper provides a comprehensive overview of the applications of UAV remote sensing in orchard management, encompassing critical tasks such as pest and disease monitoring, irrigation management, canopy pruning, flower and fruit thinning, and yield harvesting. Furthermore, the challenges and prospects of UAV remote sensing in orchard management are discussed to provide insights into the advancement of smart orchard management.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"195 ","pages":"Article 107240"},"PeriodicalIF":2.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834604","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

Plectranthus tomentosa effectively repels and control Bemisia tabaci MED with its volatiles 番泻叶的挥发物能有效驱除和控制烟粉虱 MED

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-10 DOI: 10.1016/j.cropro.2025.107228

Ruxu Li , Wenqing Liu , Su Wang , Ning Di , Shuairan Yang , Wenxiang Li , Yuting Yang , Lixia Tian

{"title":"Plectranthus tomentosa effectively repels and control Bemisia tabaci MED with its volatiles","authors":"Ruxu Li , Wenqing Liu , Su Wang , Ning Di , Shuairan Yang , Wenxiang Li , Yuting Yang , Lixia Tian","doi":"10.1016/j.cropro.2025.107228","DOIUrl":"10.1016/j.cropro.2025.107228","url":null,"abstract":"<div><div>Whitefly (<em>Bemisia tabaci</em>) is a global agricultural pest by causing serious losses and has developed cross resistance to multiple insecticides in crop production. It is essential to find sustainable measures to control <em>B. tabaci</em>. In this study, we found a shrubby perennial herb, vicks plant (<em>Plectranthus tomentosa</em>) effectively repelled <em>B. tabaci.</em> Preference and behaviors of <em>B. tabaci</em> in cages experiments and four-arm olfactometer assays were analyzed. <em>Bemisia tabaci</em> numbers were less on <em>P. tomentosa</em> plants in the cage plant-preference trials and had lower oviposition compared to tomato plants. To further investigate, we detected seven volatile organic compounds (VOCs) from <em>P. tomentosa</em> through electroantennogram (EAG) recordings. All these VOCs could elicit antennal responses of <em>B. tabaci</em> female and male adults. Interestingly, limonene, α-pinene and terpinolene were certified having repelling effects on <em>B. tabaci</em> adults by Y-tube olfactometer assays. Based on these results, <em>P. tomentosa</em> could be could be effectively utilized as a functional plant to repel <em>B. tabaci</em>. Additionally, limonene, α-pinene and terpinolene could be development into repellents for <em>B. tabaci</em>. Our research could not only verify the role of <em>P. tomentosa</em> in influencing <em>B. tabaci</em> behaviors, but also offer an environmentally friendly and effective strategy for managing <em>B. tabaci</em>.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107228"},"PeriodicalIF":2.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825415","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

Netting reduces bird damage and spotted wing Drosophila Drosophila suzukii, in high-density sweet cherries with few effects on fruit quality 在高密度甜樱桃中，网能减少鸟类伤害和斑点果蝇，对果实质量几乎没有影响

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-10 DOI: 10.1016/j.cropro.2025.107239

Catherine A. Lindell , Nikki L. Rothwell , Sidney Collino , Karen Powers

{"title":"Netting reduces bird damage and spotted wing Drosophila Drosophila suzukii, in high-density sweet cherries with few effects on fruit quality","authors":"Catherine A. Lindell , Nikki L. Rothwell , Sidney Collino , Karen Powers","doi":"10.1016/j.cropro.2025.107239","DOIUrl":"10.1016/j.cropro.2025.107239","url":null,"abstract":"<div><div>A potential benefit of high-density plantings is that their more compact size means netting is a more feasible pest and disease management tactic than in conventional plantings. We compared bird damage, spotted wing drosophila (SWD) abundance, and canker in high-density sweet cherry rows that were netted or unnetted for 2–4 weeks pre-harvest. Nets had a fine mesh that was designed to exclude SWD. We also assessed net effects on fruit quality metrics and environmental conditions. Nets significantly reduced bird damage in two years and SWD in one year (in the other year SWD were too sparse to assess net effects). Canker prevalence and color were unaffected by nets. Cracked cherries were less abundant and fruit weights were higher in netted rows in one year while percent soluble solids were higher in control rows in one year. Average, minimum, and maximum temperatures and humidity were unaffected by nets. The results indicate that netting installed a few weeks before harvest reduces bird damage and SWD in high-density sweet cherries with few negative effects on fruit quality and environmental conditions. Netting may be a useful bird and SWD management strategy when labor and materials are sufficient to install and manage netting.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"195 ","pages":"Article 107239"},"PeriodicalIF":2.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829597","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

Autodissemination of insecticides applied to agricultural pests: Spodoptera frugiperda's role in generating toxicity on its offspring 农业害虫杀虫剂的自传播：狐尾蛾对其后代产生毒性的作用

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-09 DOI: 10.1016/j.cropro.2025.107238

Emilia Martínez , María Begoña Riquelme Virgala , María Antonela Dettler , Florencia Anabella Vazquez , Rolando Caraballo , Eduardo Guzmán , Alejandro Lucia

{"title":"Autodissemination of insecticides applied to agricultural pests: Spodoptera frugiperda's role in generating toxicity on its offspring","authors":"Emilia Martínez , María Begoña Riquelme Virgala , María Antonela Dettler , Florencia Anabella Vazquez , Rolando Caraballo , Eduardo Guzmán , Alejandro Lucia","doi":"10.1016/j.cropro.2025.107238","DOIUrl":"10.1016/j.cropro.2025.107238","url":null,"abstract":"<div><div>This work examined whether <em>Spodoptera frugiperda</em> adults can pick up pyriproxyfen from an insecticide-treated surface and transfer it to their egg masses through autodissemination, inducing toxicity in newly hatched larvae upon ingestion. We also assessed pyriproxyfen distribution on egg masses during oviposition and its transfer from males to virgin females during mating. The lethal and sublethal toxicity of pyriproxyfen was evaluated through two bioassays: one on autodissemination (transfer to egg masses) and another simulating the effect of transferred doses to the egg masses. Pyriproxyfen amounts in adults and egg masses were analyzed using gas chromatography-mass spectrometry (GC-MS). Gravid females picked up the most pyriproxyfen (9.45 μg/insect), followed by males (7.67 μg/insect) and virgin females (3.30 μg/insect). Besides, gravid females transferred an average 2.61 ng/egg to their egg masses. In the autodissemination bioassay, larval emergence, pupation and adult emergence were reduced, while larval development was delayed. These findings were confirmed by the toxicity assay simulating the transferred doses. We also observed pyriproxyfen transfer from males to virgin females during mating. The results suggest that <em>Spodoptera frugiperda</em> gravid females can transfer pyriproxyfen to egg masses, causing toxicity in larvae, highlighting the potential of autodissemination as an alternative or complementary pest control method.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107238"},"PeriodicalIF":2.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824705","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

Occurrence, distribution, incidence, and severity of common bean viral diseases in resource-limited smallholder farms of western Kenya 肯尼亚西部资源有限的小农农场常见豆类病毒病的发生、分布、发病率和严重程度

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-09 DOI: 10.1016/j.cropro.2025.107231

Aggrey Keya Osogo , Francis Muyekho , Patrick Okoth , Hassan Were , G. Ayaaga

{"title":"Occurrence, distribution, incidence, and severity of common bean viral diseases in resource-limited smallholder farms of western Kenya","authors":"Aggrey Keya Osogo , Francis Muyekho , Patrick Okoth , Hassan Were , G. Ayaaga","doi":"10.1016/j.cropro.2025.107231","DOIUrl":"10.1016/j.cropro.2025.107231","url":null,"abstract":"<div><div>The common bean (<em>Phaseolus vulgaris</em> L.) is a vital pulse crop in Kenya, supporting over 300 million people in East Africa and Latin America with its high protein and starch content. However, bean production in Kenya is declining, particularly in Western Kenya, which contributes about 24 % of the country's dry bean production. The region faces significant challenges from biotic and abiotic factors, notably viral diseases that can cause crop losses of up to 100 %. Currently, there is limited information about these viruses, prevalence, and their distribution in the region A comprehensive disease diagnostic survey was conducted, during which a total of 135 Leaf samples were collected primarily to identify and delineate the distribution of viruses that impact bean crops in the region. Using serological techniques, eight viruses were identified: BCMV (59.3 %), CPMMV (47.3 %), BGMV (44.0 %), BCMNV (25.3 %), BYMV (24.2 %), MCMV (16.5 %), CMV (14.3 %), and CABMV (7.7 %). BCMV was the most prevalent, affecting 60 % of surveyed fields, while CABMV was the least common at 9 %. Importantly, MCMV, previously unreported in common beans, was also observed. Viral infections affected entire fields in 72.5 % of cases. Vihiga County had the highest average incidence and severity of viral diseases at 41.92 %, while Nandi and Bungoma had the lowest at 14 %. The study found no significant differences in viral disease severity or incidence across agro-ecological zones. The findings of this study are crucial for identifying potential outbreaks, understanding virus-host interactions, informing policy formulation, and developing effective prevention strategies for future antiviral research and breeding initiatives in this region.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107231"},"PeriodicalIF":2.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824706","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

Practical resistance of fall armyworm to Cry1A.105+Cry2Ab2+Cry3Bb1 Bt maize in Colombia 秋粘虫对Cry1A的实际抗性。哥伦比亚的105+Cry2Ab2+Cry3Bb1 Bt玉米

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-05 DOI: 10.1016/j.cropro.2025.107229

Oscar F. Santos-Amaya , Juan E. Hernandez-Plata , Daniel A. Baron-Ortiz , Claudia Y. Miranda-Montañez , Khalid Haddi

{"title":"Practical resistance of fall armyworm to Cry1A.105+Cry2Ab2+Cry3Bb1 Bt maize in Colombia","authors":"Oscar F. Santos-Amaya , Juan E. Hernandez-Plata , Daniel A. Baron-Ortiz , Claudia Y. Miranda-Montañez , Khalid Haddi","doi":"10.1016/j.cropro.2025.107229","DOIUrl":"10.1016/j.cropro.2025.107229","url":null,"abstract":"<div><div>The use of genetically modified maize hybrids that produce insecticidal proteins from <em>Bacillus thuringiensis</em> (Bt) has been the main strategy for controlling the fall armyworm (FAW), <em>Spodoptera frugiperda</em>, in the Americas. However, the evolution of practical resistance has become a great threat to the sustainable use of Bt technology. Currently, the high dose/refuge and pyramided Bt approaches are the two main IRM strategies used in the Americas to delay the evolution of resistance of FAW to Bt crops. In this study, we examined field-evolved resistance to pyramided Bt maize hybrid in the municipality of Paz de Ariporo, Casanare, Colombia, where plant damage by FAW larvae exceeded the economic threshold in 2023. The offspring reared with leaf tissue of Bt (Cry1A.105 + Cry2Ab2 + Cry3Bb1) and non-Bt maize plants showed neonate-to-adult survival rates as high as 50%. All larvae from the resistant population died within three days on Cry1Ab + Vip3Aa20 maize tissue. Our data confirm that FAW populations can overcome the pyramiding of Cry1 and Cry2 family toxins in Bt maize and that the Vip3Aa20 toxin continues to be effective for populations of this species that have lost susceptibility to the Cry1 and Cry2 toxins. These findings provide novel insights to refine current insect resistance management strategies for pyramided Bt crops.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107229"},"PeriodicalIF":2.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820267","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

The synergistic effects of entomopathogenic fungus Cordyceps javanica and parasitoid Tamarixia radiata in Asian citrus psyllid management 昆虫病原真菌爪哇虫草和拟寄生虫柽柳在柑桔木虱防治中的协同作用

IF 2.5 2区农林科学

Crop Protection Pub Date : 2025-04-05 DOI: 10.1016/j.cropro.2025.107234

Pei-Ping Xu , Xin-Yi Chen , Jia-Rui Wang , Zi-Tong Lu , Marguerite Mukangango , Wen-Sang , Bao-Li Qiu , Li-He Zhang , Shaukat Ali

{"title":"The synergistic effects of entomopathogenic fungus Cordyceps javanica and parasitoid Tamarixia radiata in Asian citrus psyllid management","authors":"Pei-Ping Xu , Xin-Yi Chen , Jia-Rui Wang , Zi-Tong Lu , Marguerite Mukangango , Wen-Sang , Bao-Li Qiu , Li-He Zhang , Shaukat Ali","doi":"10.1016/j.cropro.2025.107234","DOIUrl":"10.1016/j.cropro.2025.107234","url":null,"abstract":"<div><div>The Asian citrus psyllid (ACP), <em>Diaphorina citri</em>, is the primary insect vector of <em>Candidatus</em> Liberibacter asiaticus (<em>C</em>Las), which causes Huanglongbing (HLB) in citrus plants. Effective control of <em>D. citri</em> is crucial to preventing the spread of HLB in orchards. Biological control is a key component in Integrated Pest Management (IPM) programs aimed at reducing the use of synthetic chemical insecticides. This study evaluates the compatibility of the entomopathogenic fungus <em>Cordyceps javanica</em> (GZQ-1 strain) and the parasitoid <em>Tamarixia radiata</em>, dominant in controlling <em>D. citri</em>, to develop an effective pest management strategy and model for synergistic control. Our assessment showed that the survival rate of <em>T. radiata</em> was higher than that of <em>D. citri</em> when both were exposed to the same concentration of <em>C. javanica</em>, indicating higher toxicity of <em>C. javanica</em> to <em>D. citri</em>. However, the infected <em>T. radiata</em> exhibited reduced the search effect and parasitism. Five biological control methods were tested. Integrating interval period, pest mortality at different instar stages, and parasitoid population, the optimal strategy was determined to be releasing <em>T. radiata</em> within 6-12 days after spraying <em>C. javanica</em> during the initial flourishing period of the <em>D. citri</em> population. This comprehensive assessment of the safety and effectiveness of entomopathogenic fungi and natural enemies provides a basis for their synergistic application in IPM programs.</div></div>","PeriodicalId":10785,"journal":{"name":"Crop Protection","volume":"194 ","pages":"Article 107234"},"PeriodicalIF":2.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799361","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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