Journal of Stored Products Research最新文献

{"title":"Physical properties and quality of corn grains stored at different initial moisture contents under hermetic and non-hermetic conditions","authors":"Geraldo Acácio Mabasso ,&nbsp;Osvaldo Resende,&nbsp;Diene Gonçalves Souza,&nbsp;Elivânio dos Santos Rosa,&nbsp;Adrielle Borges de Almeida,&nbsp;Jaqueline Ferreira Vieira Bessa,&nbsp;Juliana Aparecida Célia,&nbsp;Joainny Martins Leite,&nbsp;Lara Fernanda Leite","doi":"10.1016/j.jspr.2024.102463","DOIUrl":"10.1016/j.jspr.2024.102463","url":null,"abstract":"<div><div>The aim of this study was to evaluate the dynamics of the CO₂ concentration and its relationship with the quality of corn grains stored at different initial moisture contents under different conditions. The experiment was conducted in a completely randomized design, with a 2 × 3 × 5 factorial scheme and 3 replications. A sensor was inserted into the grain mass to measure CO₂, temperature and relative humidity levels at 1-h intervals for up to 120 days, and quality assessments were performed every thirty days via physical properties and grain classification (official Brazilian standard IN 60/2011). The data were subjected to analysis of variance, followed by a <em>t</em>-test for storage conditions and linear regression for initial moisture content and storage time. The variation in temperature, relative humidity and CO₂ resulted in greater metabolic activity for the non-hermetic condition and higher initial moisture content; grains stored with an initial moisture content of 14% wb presented lower levels of deterioration, with higher bulk density values and lower grain mass porosity; color variation increased as a function of time and initial moisture content; grains stored under hermetic conditions changed to type 2 at 120 days for an 18% wb initial moisture content, whereas in the non-hermetic storage, the changes began after 30 days for 16 and 18% wb, whereas for 14% wb, the change occurred at 120 days. The integrated use of temperature sensors, combined with relative humidity and CO₂ monitoring, makes CO₂ sensors valuable tools for preventing quality loss during storage.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102463"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654220","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 aging time on the physicochemical properties of lime used to preserve corn postharvest","authors":"Efren Herrera-López ,&nbsp;Sylvanus Odjo ,&nbsp;Luis F. Zubieta-Otero ,&nbsp;Brenda L. Contreras-Jiménez ,&nbsp;Fabiola Curiel-Ayala ,&nbsp;Lina Garcia-Mier ,&nbsp;Mario E. Rodriguez-Garcia","doi":"10.1016/j.jspr.2024.102462","DOIUrl":"10.1016/j.jspr.2024.102462","url":null,"abstract":"<div><div>This study investigates the effectiveness of two types of lime (Ca(OH)₂) micronized and normal lime in the conservation of corn in Texcoco and Chiapas, Mexico, taking into account the influence of regional relative humidity on the carbonation of calcium hydroxide as a postharvest treatment. The analysis includes X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) over six months. After three months, samples were taken to assess complete carbonation and to determine the optimal mean lifetime of calcium hydroxide as a preservative against bacterial or pest infestation. Focusing on converting calcium hydroxide to calcium carbonate, the study maintains the relative humidity at 14–16% for Chiapas and 6–7% for Texcoco. The XRD study shows carbonation begins within 15 days and progresses to complete conversion to CaCO₃ after 90 days, rendering the sample inert. Infrared spectrophotometry confirms the presence of calcium carbonates, calcium oxide, and calcium hydroxide in both regions. SEM examination confirms the conversion of Ca(OH)₂ to CaCO₃ within 90 days. The collective results confirm the feasibility of lime as a postharvest preservation method for corn, with a comprehensive understanding of the temporal aspects of converting calcium hydroxide to calcium carbonate under different regional moisture conditions.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102462"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654218","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}

{"title":"Effect of ozone gas on Attagenus fasciatus (Thunberg) (Coleoptera: Dermestidae) and Gibbium psylloides (Czempinski) (Coleoptera: Ptinidae) as stored silkworm product pests","authors":"Ahmed H. Elsaffany ,&nbsp;Mohammad M.M. Bedewy ,&nbsp;Khaled H. Metwaly ,&nbsp;Hassan A. Gad","doi":"10.1016/j.jspr.2024.102461","DOIUrl":"10.1016/j.jspr.2024.102461","url":null,"abstract":"<div><div>The insecticidal potential of ozone gas was tested against two insect pests of stored silkworm products, <em>Attagenus fasciatus</em> (Thunberg) (Coleoptera: Dermestidae) and <em>Gibbium psylloides</em> (Czempinski) (Coleoptera: Ptinidae). Ozone was tested at three concentrations, 500, 1000 and 1500 ppmv for three exposure times, 1, 2 and 3 h. The adult mortality of two insects was counted during 7 days of treatment. Changes in the morphological features of two insect's adults were examined under scanning electron microscope (SEM) and the chemical composition of treated silkworm cocoons with ozone was determined. Adult mortality of <em>A. fasciatus</em> and <em>G. psylloides</em> was improved with the increase in ozone concentration and exposure time. Thus, all tested concentrations caused complete adult mortality of <em>A. fasciatus</em> after 3 and 5 days of treatment at two exposure times (2 and 3 h), respectively. While the two concentrations of ozone (1000 and 1500 ppmv) caused full mortality of <em>G. psylloides</em> adults after 5 days of treatments at exposure time 3 h. Examination with SEM of treated adults showed induction malformations on the dorsal surface as split between elytra and between the thorax and elytra as well as a split the head capsule from the thorax. Additionally, there was a decrease in the density of some microtrichiae of <em>A. fasciatus</em>. While in case of <em>G. psylloides,</em> observed induction shrinking and deformities occurred in the abdominal cuticles and the abdomen was exploded as results treating of ozone gas. Furthermore, the chemical composition analysis of treated silkworm cocoons showed a slight decrease in protein and carbohydrate contents and increasing at the fat, moisture, fiber and ash contents. Our results indicated that the ozone gas seems to be a promising fumigant for the control of <em>A. fasciatus</em> and <em>G. psylloides.</em></div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102461"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654217","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":"Potential of three selected plant essential oils and their synergistic combinations in management of Tribolium confusum on wheat grains","authors":"Soukaina Miloudi ,&nbsp;Bouchra Soulaimani ,&nbsp;Imane Abbad ,&nbsp;Abdelaziz Abbad ,&nbsp;El Hassan El Mouden","doi":"10.1016/j.jspr.2024.102464","DOIUrl":"10.1016/j.jspr.2024.102464","url":null,"abstract":"<div><div><em>Tribolium confusum</em> (Duval) is one of the most common destructive pests of stored products, resistant to a wide range of insecticides. The present study aims to evaluate the insecticidal activities of essential oil (EOs) from three medicinal plants namely, <em>Satureja calamintha</em> (L.), <em>Mentha piperita</em> (L.) and <em>Chenopodium ambrosioides</em> (L.), and their combinations against <em>T. confusum</em>. Chemical analysis of EOs investigated by gas chromatography-mass spectrometry (GC/MS) revealed that the main constituents in <em>S. calamintha</em> EO were pulegone (36.8%), menthone (31%) and menthol (19.8%). Menthofuran (23.73%) and 1,8-cineole (20.23%) were the main compounds of <em>M. piperita</em> EO, while the EO of <em>C. ambrosioides</em> was characterized by the abundance of ascaridole (36.67%), <em>p</em>-cymene (34.32%), and isoascaridole (22.8%). The insecticidal activity of the three EOs and their combinations were evaluated by contact toxicity and repellent efficacy against <em>T. confusum</em>. Generally, ternary and binary combinations showed promising toxicity compared to individual EOs with LC₅₀ = 0.022 μL/cm² and LC₅₀ = 0.057–0.078 μL/cm², respectively<em>.</em> Considering the combination index (CI) and dose-reduction index (DRI) values, studied combinations showed synergistic and additive effects with favorable dose reductions. Interestingly, a high synergistic effectiveness was recorded for the ternary combination, with a CI value of 0.4. Moreover, both individual and combined EOs showed repellent effects against tested insect pest with an average repellency rate varying between 28.8% and 72%. The nanoemulsified ternary EO combination used at 1000 ppm, achieved the highest mortality (100%) of <em>T. confusum</em> adults whiting 4-day exposure in treated wheat grains, compared to the free form (68%). The nanoemulsion exerted high efficacy without significantly affecting the wheat germination. these findings highlight the potential of ternary EO combination and its nanoemulsion for developing environmentally-friendly insecticide to be used in the management of <em>T. confusum</em> in real-world conditions.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102464"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654212","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":"Comparative efficacy of alternative insecticides for Rhyzopertha dominica management in Colombia: Beyond organophosphates and pyrethroids","authors":"German Bohórquez ,&nbsp;Luis O. Viteri Jumbo ,&nbsp;Arledys Albino-Bohórquez ,&nbsp;Eugenio E. Oliveira ,&nbsp;Tito Bacca","doi":"10.1016/j.jspr.2024.102465","DOIUrl":"10.1016/j.jspr.2024.102465","url":null,"abstract":"<div><div>Here, we directly compared the insecticide efficacy of diamides (chlorantraniliprole), neonicotinoids (thiamethoxam), and spinosyns (spinosad and spinetoram) with that of organophosphates (pirimiphos-methyl) and pyrethroids (deltamethrin) in Colombian populations (i.e., Ibagué; El Espinal; Granada; Pore, and Sahagún) of <em>R. dominica</em>. Furthermore, we established the lethal concentrations for spinetoram in our insecticide-susceptible pattern population (Ibagué) and compared this insecticide residual activity against individuals of Ibagué and El Espinal populations. The Ibagué population was most susceptible to deltamethrin and chlorantraniliprole, while Ibagué and El Espinal populations showed higher susceptibility to pirimiphos-methyl and spinetoram. Thiamethoxam exhibited similar toxicity to the Ibagué, Granada, and Sahagún populations, and the susceptibility to spinosad was similar across all populations. The spinetoram exhibited high toxicity (LC₅₀ = 0.221 (0.174–0.287) mg a.i./Kg of grains) and residual activity against individuals from Ibagué and El Espinal populations, reinforcing its potential as alternative molecule for the management of <em>R. dominica</em>. Our findings expanded the insecticide options for controlling <em>R. dominica</em> in Colombia, contributing to avoid undesired effects of pyrethroids and organophosphates.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102465"},"PeriodicalIF":2.7,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578136","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":"Dispersal ability of the predatory mites Blattisocius tarsalis and Cheyletus malaccensis in grain piles and storage facilities","authors":"J. Parsons ,&nbsp;M.S. Lopes ,&nbsp;J. Riudavets","doi":"10.1016/j.jspr.2024.102460","DOIUrl":"10.1016/j.jspr.2024.102460","url":null,"abstract":"<div><div>Predatory mites can be released into storage facilities to control various stored product pests. However, their ability to disperse within grain piles and structures (warehouses and processing facilities) has not been well assessed. This study aimed to evaluate two predatory mites, <em>Blattisocius tarsalis</em> and <em>Cheyletus malaccensis</em>, as biological control agents by examining their dispersal abilities in piles of rice grains and storage facilities. The mites were evaluated for their capacity to navigate vertically through polyvinyl chloride (PVC) tubes filled with paddy rice at depths of 40 and 100 cm to determine if they could reach the eggs of various lepidopteran pests at the bottom. Additionally, their dispersal ability over varying time intervals and their preferences concerning light intensity were assessed in 2-m-long channels coated with rice flour residues. An integrated assessment of their vertical and horizontal dispersal capacities, along with the influence of light, was conducted in a controlled pilot storage room (4 × 3 × 3 m). <em>Blattisocius tarsalis</em> demonstrated impressive dispersal capabilities, reaching pest eggs at vertical depths of 40 and 100 cm through rice and dispersing 2 m horizontally in just 4 h. This proficiency extended to pilot storage room conditions, where it successfully navigated all distances, both horizontally and vertically, showing a preference for navigating away from the light. <em>Cheyletus malaccensis</em> proved to be an effective predator at close range to pest eggs but demonstrated limited dispersal capabilities in complex setups. This study underlines the suitability of <em>B. tarsalis</em> as a biological control agent capable of dispersing in various environments. Conversely, the utility of <em>C. malaccensis</em> may be more specialised and effective within a narrow movement range. These findings highlight the importance of understanding mite dispersal behaviours for optimising pest management strategies and contributing to the more sustainable and effective storage of rice grains.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102460"},"PeriodicalIF":2.7,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572826","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}

{"title":"Physical and biochemical characteristics of cereal grains affect population growth parameters of Sitophilus oryzae (L.) (Coleoptera: Curculionidae)","authors":"Zahra Abedi ,&nbsp;Jabraeil Razmjou ,&nbsp;Hooshang Rafiee Dastjerdi ,&nbsp;Asgar Ebadollahi","doi":"10.1016/j.jspr.2024.102459","DOIUrl":"10.1016/j.jspr.2024.102459","url":null,"abstract":"<div><div>The rice weevil, <em>Sitophilus oryzae</em> L. (Coleoptera: Curculionidae), is a significant pest of rice and other cereal grains. In this research, the effects of various grain species, including barley, maize, millet, rice, sorghum, and wheat, were assessed on biological properties and life history variables of <em>S. oryzae</em> under laboratory conditions. Data were analyzed based on the age-stage, two-sex life table method. Furthermore, various physicochemical properties of cereal grains, including protein content, starch content, humidity content, and seed hardness, were investigated to explore their correlation with the studied parameters of <em>S. oryzae</em>. The longest development time was observed on millet and sorghum hosts, while the shortest was on maize seed. The beetles reared on rice and millet species showed the maximum fecundity, whereas those reared on sorghum and millet grains showed the lowest. Maize grain had the highest intrinsic rate of increase (<em>r</em>), whereas millet and sorghum grains had the lowest. According to the correlation analysis, overall, seed protein content was negatively correlated with insect fecundity, <em>R</em>₀ and <em>r</em>, but positively correlated with development time. Furthermore, starch content was positively correlated with insect fecundity, <em>R</em>₀ and <em>r</em>, and negatively correlated with development time. The cluster results demonstrated that whereas sorghum and millet were comparatively resistant hosts for the growth of <em>S. oryzae</em>, maize and rice were relatively susceptible seeds. This information can be helpful in the development or improvement of integrated pest management (IPM) strategies against rice weevil. The findings of this research will also be helpful in introducing unsuitable hosts for the development of transgenic grains resistant to <em>S. oryzae</em>. The pest-resistant cereal grains identified in this study can potentially be utilized in combination with other pest control strategies for sustainable management of <em>S. oryzae</em>, which may help reduce the excessive use of chemical insecticides.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102459"},"PeriodicalIF":2.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572825","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":"Effects of storage time on nutritive qualities, volatile components, and microbial community of native grass hay","authors":"Yuyu Li ,&nbsp;Lifen Hao ,&nbsp;Shuai Du ,&nbsp;Qiang Si ,&nbsp;Yandong Zhang ,&nbsp;Kejian Lin ,&nbsp;Yushan Jia","doi":"10.1016/j.jspr.2024.102454","DOIUrl":"10.1016/j.jspr.2024.102454","url":null,"abstract":"<div><div>Microbial activity in stored native grass hay may induce quality deterioration and alter flavor profiles, resulting in significant economic losses and forage safety risks. This study elucidated the association between microbial communities, nutritive qualities, and volatile components during native grass hay storage. High-throughput sequencing was conducted for determining the microbial composition of stored native grass hay. Headspace solid-phase microextraction-gas chromatography-mass spectrometry was performed for identifying volatile compounds in native grass hay. This study also assessed the correlation of volatile compounds with the hay microbiome. According to the obtained results, the water-soluble carbohydrate and crude protein content of native grass hay significantly decreased by 14.37% and 25.24%, respectively, after 360 days of storage (<em>P</em> &lt; 0.01). From the 112 volatile compounds identified in native grass hay, hydrocarbons and alcohols were the major contributors to the volatile profile characteristics of native grass hay during storage, while ketones, heterocyclic compounds, and aromatic compounds were the minor constituents. Forty-nine potential spoilage markers were screened based on OPLS-DA and VIP values. The dominant fungi at the phylum level were Ascomycota and Basidiomycota. <em>Alternaria</em> and <em>Kabatiella</em> were the main fungal genera during the storage of native hay. Correlation analysis showed that 3 key volatile compounds (eucalyptol, geranyl acetone, and dihydroactinidiolide) exhibited a high association with quality loss and <em>Aspergillus</em> of native grass hay. The present findings could improve our knowledge about how storage affects microbial communities and volatile components in native grass hay.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102454"},"PeriodicalIF":2.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554199","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":"Effective control of citrus green mold using plasma-activated water with hydrogen peroxide vapor: A non-thermal approach","authors":"Amir Shabannejad ,&nbsp;Farshad Sohbatzadeh","doi":"10.1016/j.jspr.2024.102457","DOIUrl":"10.1016/j.jspr.2024.102457","url":null,"abstract":"<div><div>In this study, a novel approach for controlling <em>Citrus sinensis</em> Salustiana green mold disease in oranges was developed using plasma-activated water (PAW) generated by a Surface Dielectric Barrier Discharge (SDBD) system reinforced with H₂O₂ cold vapor. <em>Penicillium digitatum,</em> the primary cause of orange mold, was the target of the treatment. The efficiency of the setup was investigated in three stages. First, a suspension of <em>P. digitatum</em> spores was directly treated with Ar/H₂O₂ plasma to estimate the optimal plasma exposure time required for maximum fungal inactivation. Second, the impact of Argon/H₂O₂ plasma-treated water (PTW), generated from various plasma exposure times, on mold growth on orange peels was examined. For this, orange peels were placed in Ar/H₂O₂-PTW for different durations, and mold occurrence was monitored. Finally, the effect of PTW, generated from various Ar/H₂O₂ plasma exposure times, on mold growth on whole oranges was investigated. Oranges were treated with Ar/H₂O₂-PTW for different durations, and mold occurrence was analyzed. The results demonstrated that a 20-min treatment of oranges with PTW produced from a 420-s Ar/H₂O₂ plasma exposure time led to complete inactivation of <em>P. digitatum</em>. This study showed that this hybrid scenario can be effectively used for fungal decontamination in the food industry.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102457"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554200","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":"Influence of various temperatures on the saw-toothed grain beetle Oryzaephilus surinamensis L. (Coleoptera: Silvanidae) and the potential use for management in stored dates","authors":"B.M.A. Abdel-Banat ,&nbsp;H.A.F. El-Shafie ,&nbsp;I.A. Bou-Khowh","doi":"10.1016/j.jspr.2024.102455","DOIUrl":"10.1016/j.jspr.2024.102455","url":null,"abstract":"<div><div>The saw-toothed grain beetle <em>Oryzaephilus surinamensis</em> L. has emerged as a key pest of stored loose dates. This investigation aims to elucidate the effects of various temperatures on the beetle. About 52% of tested adult beetles survived without food for 10 days at temperatures of 4 °C and 18 °C, whereas at 0 °C, only 7% survived for 8 days, and at 27 °C, 12% survived for 10 days. Moreover, three stages of the beetle were incubated at −20 °C for different durations. They were kept either free or inside dates during the treatment. The mortality rate of free adult beetles at −20 °C was 2%, 61%, and 86% in 15 min, 20 min, and 25 min, respectively. Thirty-minute exposure at −20 °C resulted in 100% mortality of the treated adults. However, when the beetles were protected inside date fruits, the mortality rate was only 25% after 1 h of incubation at −20 °C. Alternatively, 2 h of exposure at −20 °C caused 100% mortality of the beetles despite being protected inside the dates. Similarly, treatment of larvae without food at −20 °C resulted in a mortality of about 93% of the populations in 30 min, but when the larvae were protected inside dates, 100% mortality occurred within 2 h. Furthermore, 2 h of exposure at −20 °C inhibited the hatchability of eggs inside dates by about 96.7%. These results could provide a valuable alternative to fumigation and other pesticides for the management of <em>O. surinamensis</em> in stored dates.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"109 ","pages":"Article 102455"},"PeriodicalIF":2.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539408","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}