Journal of Stored Products Research最新文献

{"title":"Molecular characterization and expression analysis of six small heat shock protein genes in Trogoderma granarium during cold and starvation-induced larval diapause","authors":"Asli Dageri","doi":"10.1016/j.jspr.2024.102368","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102368","url":null,"abstract":"<div><p>The khapra beetle, <em>Trogoderma granarium</em> Everts (Coleoptera: Dermestidae), is a highly invasive pest infesting stored grains, cereal products, and is recognised as a quarantine pest in many countries. Various stressors can instigate prolonged diapause among insect larvae, increasing the challenge of managing infestation. When the environmental conditions become conducive to development, diapause ceases, and the larva progresses on its developmental course. Members of the Heat Shock Protein (HSP) family play a significant role in protecting insects from the impacts of environmental stressors. In this study, six small heat shock proteins (TsHSP19.8, TsHSP20.5, TsHSP20.6, TsHSP20.8, TsHSP21.2, and TsHSP21.3) were identified and characterized in <em>T. granarium</em>. Transcript abundances of <em>TsHSP</em>s were analysed across distinct phases of larval diapause induced by both cold exposure and starvation stress treatments, alongside various developmental stages. The gene expression patterns of <em>TsHSP20.5</em> and <em>TsHSP21.2</em> exhibited peak mRNA levels during pre-diapause following the cold treatment, while the greatest abundances of <em>TsHSP19.8</em>, <em>TsHSP20.6</em>, <em>TsHSP20.8</em>, and <em>TsHSP21.3</em> were detected in the diapause phases. The highest mRNA abundances of <em>TsHSP20.5</em>, <em>TsHSP20.8</em>, <em>TsHSP21.2</em>, and <em>TsHSP21.3</em> were observed during the diapause phase following the starvation treatment, while it was noted on the first day of the post-diapause phase for <em>TsHSP19.8</em> and <em>TsHSP20.6</em>. The remarkable levels of <em>TsHSP</em>s during diapause might imply their putative role in cold and starvation survival. Significant expression of <em>TsHSP19.8</em>, <em>TsHSP20.6</em>, <em>TsHSP20.8</em>, and <em>TsHSP21.3</em> transcripts was observed in adults, suggesting their potential involvement in developmental processes. Understanding the genetic mechanisms involved in the diapause physiology of <em>T. granarium</em> could offer additional insights for the integrated management of this pest.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424070","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}

{"title":"Plodia interpunctella larvae exposed to 2% O2 with or without 4% CO2 showed changes in chemical substances, enzyme activities, body mass, and water content","authors":"Yilin Huang ,&nbsp;Dianxuan Wang ,&nbsp;Fuji Jian ,&nbsp;Zhang Meng","doi":"10.1016/j.jspr.2024.102358","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102358","url":null,"abstract":"<div><p>Understanding the change of chemical substances and enzyme activities of stored product insects exposed to low CO₂ and O₂ will help to develop an optimum strategy of controlled atmosphere (CA) application. The body mass, chemical (water, fat, protein, total sugar, and glycogen) content, enzyme (superoxide dismutase, peroxidase, and catalase) activity, and survival of the 5th instar larvae of <em>Plodia interpunctella</em> (Hübener) were determined before and after the CA treatment. The tested CA condition was 4% CO₂ + 94% N₂ + 2% O₂ (2% O₂ with 4% CO₂), 98% N₂ + 2% O₂ (2% O₂ without 4% CO₂), and air (control) for 1.5, 3.0, or 4.5 d exposure. The survival of the larvae in 4% CO₂ + 94% N₂ + 2% O₂ and 98% N₂ + 2% O₂ was 82 and 88% for 1.5 d exposure, 61 and 77% for 3.0 d, 43 and 60% for 4.5 d; respectively. The larvae lost more body mass and water in the mixture of 4% CO₂ + 94% N₂ + 2% O₂ than that in 98% N₂ + 2% O₂ at the same exposure time, and the loss increased with the increase of exposure time. More than 50% of the lost body mass was the water loss. The contents of fat, protein, total sugar, and glycogen of the larvae in 4% CO₂ + 94% N₂ + 2% O₂ were reduced by 6, 14, 20, 22% for 1.5 d exposure; 13, 25, 41, 40% for 3.0 d; and 22, 32, 58, 55% for 4.5 d; respectively. In 98% N₂ + 2% O₂, they were reduced by 4, 11, 11, 16% for 1.5 d exposure; 10, 20, 29, 37% for 3.0 d; and 20, 26, 42, 48% for 4.5 d; respectively. The enzyme activity increased up to 3.31 U/mg protein for superoxide dismutase in 1.5 d, 15.16 U/mg protein for peroxidase in 3.0 d, and 58.54 U/mg protein for catalase in 4.5 d in 4% CO₂ + 94% N₂ + 2%O₂. The treatment with 4% CO₂ + 96% N₂ + 2% O₂ can give more significant change on insect body weight, substances in the body, survival, POD and CAT activity than those in 98% N₂ + 2% O₂.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424071","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}

{"title":"Effect of probiotic Lactiplantibacillus plantarum strains on some properties of grapefruit juice and naringin","authors":"Arzu İmece ,&nbsp;Memnune Şengül ,&nbsp;Bülent Çetin ,&nbsp;Haktan Aktaş","doi":"10.1016/j.jspr.2024.102359","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102359","url":null,"abstract":"<div><p>For citrus juices, especially grapefruit juice, bitterness is an important problem. In this study, some probiotic bacteria with naringinase enzyme activity (<em>L. plantarum</em> ACC 54, <em>L. plantarum</em> ACC 28, and <em>L. plantarum</em> 250) were added to grapefruit juice in order to reduce naringin, one of the most important bitterness components. Then, the physicochemical properties of grapefruit juice were investigated with changes in antioxidant activity, phenolic compounds and naringin amount. Improvements in the physicochemical properties of grapefruit juices were detected in the first three days of storage. Water-soluble dry matter, determined as Brix, was 9.13 on the first day of storage, and this amount decreased to 8.66 after 4 weeks of storage. Likewise, pH decreased from 3.58 to 3.11, and titratable acidity increased from 0.79% to 1.46%. Colour values were determined spectrophotometrically. During the storage period, IC value varied between 3.98 and 5.24, colour shade 1.27–1.29, red colour 32.18–32.54%, yellow colour 41.022–41.97%, and blue colour 26.80–25.49%. From the beginning of the storage period to the end of 4 weeks of storage, decreases were identified for DPPH• and ABTS•+ radicals, with the results changing from 16.41 to 31.98 and from 7.45 to 11.95, respectively. Total phenolic content was determined using the Folin-Ciocalteu reagent and values were 643.32–319.72 mg GAE/L from the beginning to the end of storage. The phenolic compound profile was determined by LC-MS/MS and the highest phenolic compound was found to be quinic acid (35768.88 ppb) in B25 at the end of the 4th week. The amount of naringin in grapefruit juice samples was determined by HPLC. The highest decrease (61.5%) in the amount of naringin in the samples was detected in B37 at the end of the 3rd day.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141333340","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}

{"title":"Effect of zinc fortified, arid and irrigated wheat varieties flour upon life history parameters of red flour beetle, Tribolium castaneum (Herbest) (Coleoptera: Tenebrionidae)","authors":"Muhammad Rizwan ,&nbsp;Muhammad Yasin ,&nbsp;Muhammad Tahir ,&nbsp;Ammad Ahmad ,&nbsp;Ansa Banazeer ,&nbsp;Muhammad Babar Shahzad Afzal ,&nbsp;Umair Sagheer","doi":"10.1016/j.jspr.2024.102370","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102370","url":null,"abstract":"<div><p>Red flour beetle, <em>Tribolium castaneum</em> (Herbest) (Coleoptera: Tenebrionidae) is a stored grain pest. Various fortified wheat varieties have been produced but data about the impact of different wheat varieties flour on life history parameters of <em>T. castaneum</em> are poorly understood. This study evaluated the effect of fortified (Zincol-16 T1), arid zone [(BARS-09 T2), and (Fatehjang-2016 T3)] and irrigated zone [(Faisalabad-2008 T4), (Gold-2016 T5), (Manthar-03 T6), (Fareed-06 T7), (Mairaj-08 T8)] wheat varieties flour upon some life history parameters of <em>T. castaneum</em> in the laboratory using age-stage two sex life table. The egg incubation period, adult male and female longevities, and total male and female longevities of <em>T. castaneum</em> were shortest in T5 and T6 as compared to all other treatments. The T5 presented shorter larval and pre-adult duration. Egg incubation, larval, and pupal durations and total male and female longevities were higher in T1. Total longevity (egg to adult) of <em>T. castaneum</em> was lowest in T1 as compared to T3 and T4 but similar to other treatments. Pre-adult duration was longer in T1 as compared to all other treatments. Pre-adult survival was significantly lower in T1 (53%) than all the treatments in which it remained at par. Lowest proportion of female adult (<em>Nf/N</em>) was found in T1 as compared to T3, T4, and T7. Age stage specific survival rate (<em>s</em>_<em>xj</em>) was lower on T1, whereas life expectancy (<em>e</em>_<em>xj</em>) was higher than other varieties. These results suggest that <em>T. castaneum</em> develop poorly upon zinc fortified wheat variety, Zincol as compared to other varieties thus it can be a good integrated pest management tool against this pest.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141328996","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}

{"title":"Predictive modelling of allowable storage time for pearl millet using multilayer perception neural network","authors":"Jayasree Joshi T.,&nbsp;P. Srinivasa Rao","doi":"10.1016/j.jspr.2024.102369","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102369","url":null,"abstract":"<div><p>Biotic and abiotic factors interact to damage grains in the storage ecosystem. Monitoring temperature fluctuations and moisture migration is crucial to control their impact on grain quality. Grains with high temperature and moisture content have limited time for post-harvest activities. Hence, it is important to determine the time before spoilage for different grain moisture contents and storage temperatures. The study evaluated the impact of storage variables, specifically moisture content, storage temperature, and storage period, on the parameters associated with grain quality and seed deterioration in pearl millet. A model for predicting the allowable storage time was developed using a feed-forward-back propagation multilayer perception (MLP) neural network. The effectiveness of Levenberg–Marquardt (LM), Bayesian Regularization (BR), and Scaled Conjugated Gradient (SCG) algorithms in predicting the safe storage time was evaluated and compared. The BR neural network model showed higher predictability with an R² value greater than 0.98 and low error values. The safe storage guidelines chart and model developed for allowable storage time will be helpful for farmers and grain processing industries including storage hubs to schedule different post-harvest operations of pearl millet with minimal changes in grain quality.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141314765","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}

{"title":"Evaluation of surface structure, water sorption properties, water plasticizing effect, and color stability of dried chrysanthemums","authors":"Xinfeng Cheng ,&nbsp;Shihao Wang ,&nbsp;Zhifu Yang ,&nbsp;Xiangxiang Li ,&nbsp;Lijie Hong","doi":"10.1016/j.jspr.2024.102367","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102367","url":null,"abstract":"<div><p>The storage stability of two varieties of chrysanthemum (<em>Chrysanthemum morifolium</em> Ramat. cv. HSGJ and <em>C. morifolium</em> Ramat. cv. JSHJ)was evaluated in this study through an analysis of their water binding behavior. This involved examining the surface structure of the powdered dried chrysanthemums, studying the water sorption characteristics, and quantifying the water plasticizing effect. In comparison to JSHJ, powdered HSGJ had a smaller particle size and more hydrophilic groups on its surface. Additionally, it exhibited significantly higher characteristic values of adsorbed water, excluding the number of adsorbed monolayers (N_am). The sorption of water by the powdered chrysanthemums conformed to a type II isotherm. The Guggenheim–Anderson–deBoer (GAB) model was trustworthy for predicting water sorption within the range of <em>a</em>_<em>w</em> from 0.112 to 0.907 and temperatures between 20 and 40 °C. The exothermic interactions between water molecules and the primary sorption sites of the powdered samples became more powerful when the temperature decreased. Powdered chrysanthemums can be preserved at 30 °C if the humidity is below 0.0852 g/g for HSGJ and 0.0766 g/g (d.b) for JSHJ. The color changes of powdered samples were not significantly affected when stored in a glassy state. This study is significant for identifying the drying endpoint, predicting shelf life, and choosing suitable packaging materials for dried chrysanthemums.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141314764","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}

{"title":"Evaluation of methyl salicylate, limonene, and thymol as potential biocidal against Trogoderma granarium everts larvae","authors":"Mokhtar Abdulsattar Arif ,&nbsp;Salvatore Guarino","doi":"10.1016/j.jspr.2024.102366","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102366","url":null,"abstract":"<div><p>The investigation of plant-based natural products, especially essential oils, as insecticide alternatives, responds to challenges as induced resistance and environmental drawbacks linked to prolonged synthetic insecticide use. Although essential oils demonstrate promising activity, their utilization faces hurdles related to standardization. In this study, contact/fumigation properties of three molecules (methyl salicylate, limonene and thymol) known for their activity against stored product beetles, were tested in laboratory bioassays toward young and old larval stages of <em>Trogoderma granarium</em>. The experiment revealed significant differences in their effects based on larval age and chemical concentration. Methyl salicylate exhibited concentration-dependent effects on both young and old larvae, with higher concentrations leading to accelerated mortality rates. For instance, young larvae exposed to 10 mg displayed an LT50 of 33.75 h, while old larvae showed an LT50 of 39.07 h. Similarly, at a concentration of 5 mg, young and old larvae exhibited LT50 values of 72.79 and 79.68 h, respectively, after treatment. Limonene also exhibited concentration-dependent effects, although with lower potency compared to methyl salicylate. Thymol showed efficacy only against young larvae of <em>T. granarium</em>. Statistical analyses confirmed the significant impact of each chemical on larval survival time, with tested chemicals displaying significant concentration-dependent variations in mortality rates. These findings suggest the potential of methyl salicylate, and to a lesser extent limonene and thymol, as effective biocidal agents against <em>T. granarium</em> larvae.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141303766","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}

{"title":"Control efficacy of isolates of Aspergillus nidulans and Aspergillus fumigatus against three destructive insect pests of stored grain","authors":"Hafiz Azhar Ali Khan ,&nbsp;Tiyyabah Khan ,&nbsp;Naeem Iqbal ,&nbsp;Waheed Anwar ,&nbsp;Muhammad Ali","doi":"10.1016/j.jspr.2024.102357","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102357","url":null,"abstract":"<div><p>Entomopathogenic fungi could be helpful in the management of stored insects and to reduce the use of synthetic broad-spectrum pesticides. Identifying the most virulent isolates of entomopathogenic fungi is important before any potential application for the control of stored products insect pests. This research aimed to assess the effectiveness of six isolates of <em>Aspergillus nidulans</em> (FCBP-EPF-1551, -1555 and −1579) and <em>A. fumigatus</em> (FCBP-EPF-1549, -1580 and −1605) in causing mortality and progeny suppression of three major storage insects, <em>Rhyzopertha dominica</em> (F.) (Coleoptera: Bostrychidae) (the lesser grain borer), <em>Tribolium castaneum</em> (Herbst) (Coleoptera: Tenebrionidae) (the red flour beetle) and <em>Trogoderma granarium</em> Everts (Coleoptera: Dermestidae) (the khapra beetle), under controlled environment. Each fungal isolate was evaluated at four different dose levels: 1 × 10⁴, 1 × 10⁶, 1 × 10⁸ or 1 × 10¹⁰ conidia kg⁻¹ wheat grains, and at three time intervals: 7, 14 and 21 d. Mortality count data of all insect species exhibited an increasing trend with increase in dose level and time interval. Generally, the isolates of <em>A. fumigatus</em> resulted in the highest mortality of all insect species along with a remarkable effect on progeny suppression in the next generation. Mortality and progeny suppression data revealed that <em>R. dominica</em> was the most susceptible species followed by <em>T. castaneum</em> and <em>T. granarium</em>. To sum up, the data of the present study clearly indicate the potential of <em>A. nidulans</em> and <em>A. fumigatus</em> isolates as biocontrol agents against tested insect species of stored grains.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291970","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}

{"title":"Population genetic structure of the rice weevil, Sitophilus oryzae (L.), in Australia: A pest with limited flight dispersal","authors":"A. Toon ,&nbsp;G.J. Daglish ,&nbsp;A.W. Ridley ,&nbsp;R.N. Emery ,&nbsp;J.C. Holloway ,&nbsp;G.H. Walter","doi":"10.1016/j.jspr.2024.102355","DOIUrl":"https://doi.org/10.1016/j.jspr.2024.102355","url":null,"abstract":"<div><p>The rice weevil, <em>Sitophilus oryzae</em> (L.) (Curculionidae), is a globally distributed pest of stored grain, but despite having functional wings it is considered a reluctant flier. An analysis of the population genetics of <em>S. oryzae</em> from all major regions in Australia where grain is grown and stored in bulk revealed limited population structure nationally, despite our expectation that the low levels of flight in this species would impose considerable population structure geographically. Little genetic structure detected in nuclear DNA yet strong mitochondrial DNA structure was found among populations within the growing regions suggesting greater dispersal in males than females. Also, there were low levels of mitochondrial DNA diversity within and among Australian <em>S. oryzae</em> populations. Anthropogenic movement is most likely the reason for the observed lack of isolation-by-distance pattern of gene flow, especially in eastern Australia. The extent of gene flow demonstrated in our study has potential implications for the development and spread of phosphine resistance in Australia. Undoubtedly, selection for phosphine resistance in <em>S. oryzae</em> is occurring in all grain growing regions because of the widespread use of phosphine fumigation, but the level of gene flow demonstrated in Australian <em>S. oryzae</em> suggests that we can expect some spread of resistant insects geographically despite the apparent limited flight in this species.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141249750","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}

{"title":"Development of Bruchus rufimanus Boheman 1833 (Coleoptera: Chrysomelidae) at different temperatures with special emphasis on rearing and modelling approach","authors":"Arnaud Segers ,&nbsp;Luca Rossini ,&nbsp;Rudy Caparros Megido ,&nbsp;Emanuele Garone ,&nbsp;Frederic Francis","doi":"10.1016/j.jspr.2024.102352","DOIUrl":"10.1016/j.jspr.2024.102352","url":null,"abstract":"<div><p>Modelling the thermal response of insect pests is a valuable tool for predicting the stage development of the population, supporting the formulation of more sustainable and effective control strategies. This study focuses on <em>Bruchus rufimanus</em>, a specific pest of <em>Vicia faba</em> L. responsible for damages caused by larvae that develop inside the seeds. In particular, it tackled the thermal development modelling of this pest in a two-fold approach, given the current lack of information on the cryptic post embryonic development in terms of degree-days. Baseline data were collected by laboratory rearing that considered the insect reproductive diapause and proposed first insights for developing a protocol to rear this pest under controlled conditions. Subsequently, various models were evaluated to describe the effect of different constant temperatures on the embryonic and total development. The effect of temperature on the sex ratio of the next generation was also investigated. The most accurate model for the description of both embryonic and total development was the <em>Briere-2</em> model. The temperature thresholds obtained for eggs and total pest developments were 8.2 ± 0.5 °C and 12 °C respectively. Cumulative degree-day requirements were 83°-days for eggs and ranged from 550 to 740°-days for total development. Temperature had no effect on sex ratio. These findings provided a better understanding of the annual development of this pest and might support the future formulation of IPM strategies to control <em>B. rufimanus</em>.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195312","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}