{"title":"Is there any relationship between the effectiveness of some Heterorhabditis bacteriophora isolates on the host and their average penetration rate?","authors":"","doi":"10.1016/j.jspr.2024.102401","DOIUrl":"10.1016/j.jspr.2024.102401","url":null,"abstract":"<div><p>Entomopathogenic nematodes, such as <em>Heterorhabditis bacteriophora</em>, have been widely recognized for their potential in biological control strategies to manage agricultural pests effectively. This study aimed to evaluate the penetration rate and efficacy of different <em>H. bacteriophora</em> isolates, including two isolates (HB4 and HBNL) and a hybrid strain (HBH), against <em>Tenebrio molitor</em> L. (Col: Tenebrionidae) adults. The research also aimed to determine whether there was a correlation between the mortality caused by these isolates and their penetration. These isolates were applied to <em>T. molitor</em> adults at different concentrations 0.78 IJs (infective juveniles)/cm<sup>2</sup> (50 IJs/Petri dishes), 1.57 IJs/cm<sup>2</sup> (100 IJs/Petri dishes), 2.36 IJs/cm<sup>2</sup> (150 IJs/Petri dishes), 3.14 IJs/cm<sup>2</sup> (200 IJs/Petri dishes), 3.93 IJs/cm<sup>2</sup> (250 IJs/Petri dishes), 7.86 IJs/cm<sup>2</sup> (500 IJs/Petri dishes), 11.8 IJs/cm<sup>2</sup> (750 IJs/Petri dishes), 15.72 IJs/cm<sup>2</sup> (1000 IJs/Petri dishes), 19.66 IJs/cm<sup>2</sup> (1250 IJs/Petri dishes). Another objective of the study was to observe the penetration rate means of these nematodes at consistent concentrations and record the resulting mortality rates. The findings revealed that the highest mortality rate of 100% was achieved at concentrations of 250, 500, 750, 1000, and 1250 IJs/Petri dishes. The HBH hybrid strain also exhibited the highest penetration rate mean of 20.33 IJs at a concentration of 1250 IJs/Petri dishes. These results highlight the efficacy of <em>H. bacteriophora</em> isolates and the hybrid strain in controlling <em>T. molitor</em> adults, with significant mortality rates observed at higher nematode concentrations. The study's emphasis on penetration rate means and the relationship between nematode concentration and pest mortality underscores the importance of optimizing entomopathogenic nematode applications for effective pest management.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142076934","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":"The research and application of technology and core components in commercial refrigeration and freezing Systems:A review","authors":"","doi":"10.1016/j.jspr.2024.102400","DOIUrl":"10.1016/j.jspr.2024.102400","url":null,"abstract":"<div><p>Refrigeration equipment is a kind of equipment that uses refrigeration technology to maintain the low temperature state of food, medicine and other items, which is widely used in industrial, commercial and household fields. With the development of social economy and the improvement of people's living standards, the demand and technical level of refrigeration equipment are also constantly improving. This paper summarizes the technical progress of refrigeration equipment in recent years, mainly including the following three aspects: (1) the development direction and trend of refrigeration technology in refrigeration system; (2) Refrigerants commonly used in refrigeration systems and their advantages and disadvantages, as well as the research and application of new environmentally friendly refrigerants; (3) Technical progress of key components that affect the performance and efficiency of refrigeration systems, such as compressors, evaporators, condensers, and related optimization design and improvement methods. The purpose of this paper is to provide reference for the research and development of refrigeration equipment.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041168","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":"The feeding preference of red flour beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) on wheat flour stored at varied temperatures: The perspective of volatile components","authors":"","doi":"10.1016/j.jspr.2024.102397","DOIUrl":"10.1016/j.jspr.2024.102397","url":null,"abstract":"<div><p>As a common pest in wheat flour, <em>Tribolium castaneum</em> Herbst (Coleoptera: Tenebrionidae) is responsible for economic losses and potential risks to food safety. This study aimed to investigate the feeding preferences of <em>T. castaneum</em> on wheat flour stored at different temperatures, analyzed the key flavor compounds influencing its feeding preferences, and laid down the foundation for the development of new <em>T. castaneum</em> attractants and repellents. According to results, in the early storage period, <em>T. castaneum</em> showed a higher preference for feeding on wheat flour stored at higher temperatures, but this trend decreased over the storage time with a preference shift towards the flour preserved at lower temperatures. The findings from GC-MS revealed changes in the types and concentrations of volatile components in wheat flour during storage. PCA and correlation analysis suggested that compounds such as 2-methyldodecane, 3-methyl-3-ethylheptane, benzaldehyde, decanal, and n-hexanol exhibited potential attractiveness to <em>T. castaneum</em>. Conversely, 2-methyloctane, 2,5-dimethyldodecane, and dodecane were identified as potential repellents. At different storage temperatures, benzaldehyde and 2-methyloctane displayed consistent attractant and repellent effects, indicating their potential as effective components for attractance and repellence. Overall, our work shed the light regarding the feeding preference of <em>T. castaneum</em> on wheat flour stored at different temperatures from the perspective of volatile component variations, and provided a theoretical basis for the development of novel attractants and repellents.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041170","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":"A shelf life prediction model of Actinidia arguta ‘Chang Jiang No.1’ based on postharvest quality evaluation combined with fuzzy mathematics","authors":"","doi":"10.1016/j.jspr.2024.102396","DOIUrl":"10.1016/j.jspr.2024.102396","url":null,"abstract":"<div><p><em>Actinidia arguta</em> has good taste and nutritional value. It is a climacteric fruit that is not durable during storage and has a short shelf life. To investigate the effects of storage and transportation on the quality of the early maturing variety Chang Jiang No. 1 (CJ No. 1), shelf life models were developed applicable at different temperatures. Fuzzy mathematics was used to evaluate the sensory senses of different storage stages at 2, 5, 15 and 25 °C, and the storage end-time was determined to be 35, 25, 15 and 10 days, respectively. All indices followed zero-order reaction kinetics (ΣR<sub>0</sub><sup>2</sup> > ΣR<sub>1</sub><sup>2</sup>) and kinetic parameters <em>k</em>, <em>A</em> and <em>E</em><sub><em>a</em></sub> were calculated. Combined with the Arrhenius equation, a kinetic model was established based on key indices. The mean relative errors (MRE) of the key indices and shelf-life<sub>All</sub> (SL<sub>All</sub>) were less than 10% when comparing predicted and measured values. The weight of each index was determined using the Analytic Hierarchy Process (AHP), and a consistency test was conducted. Samples at 20 °C were selected to verify the model. The shelf life of CJ No.1 from 2 to 25 °C can be predicted according to the weighted model. The results of this study can help distributors and consumers determine the best time to eat <em>A. arguta</em> and the appropriate storage time. The ideas and methods of this study can also be promoted and applied to other fruit and vegetables to achieve a wider temperature range and a method of prediction of their shelf lives.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012327","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 chitosan grafted with gallic acid treatment on the postharvest physiology and biochemistry of Saimaiti apricots","authors":"","doi":"10.1016/j.jspr.2024.102390","DOIUrl":"10.1016/j.jspr.2024.102390","url":null,"abstract":"<div><p>Traditional cold storage methods may not adequately preserve the flavor of apricot fruit, impacting its overall edible quality. Chitosan-gallic acid derivative membranes can address the insufficient antioxidant and antibacterial properties of chitosan alone, thereby better preserving the aroma of apricots. In this study, Xinjiang Saimaiti apricots were treated with chitosan (CS, 0.5% and 1%) and CS grafted with gallic acid (GA-g-CS, 0.5% and 1%) during storage at 1 °C ± 0.5 °C. The effects of GA-g-CS treatment on postharvest physiology, aromatic volatile content, amino acid content, and fatty acid content of apricots were analyzed. These results showed that 1% GA-g-CS derivatives effectively maintained fruit firmness, soluble solid content (SSC), and titratable acid (TA); postponed the rise in weight loss, fell in respiratory rate, and inhibited the release of ethylene. GA-g-CS derivatives could restrain the accumulation of malondialdehyde (MDA) and increase the relative electrical conductivity. The results demonstrated that reducing polyphenol oxidase (PPO) activity and improving peroxidase (POD) activity could delay fruit browning and aging. The application of 1% GA-g-CS effectively preserved the levels of esters and ketones in Saimaiti apricots throughout the storage period. Moreover, it decelerated the decline in aldehyde content and efficiently decreased the production of ethanol during storage. The correlation analysis revealed significant positive correlations between aspartate, alanine, linoleic acid, and α-linolenic acid and the main aroma components. Conversely, stearic acid exhibited a significant negative correlation with the main aroma components. To sum up, chitosan-gallic acid derivatives can be used as a new type of edible film for fruit and vegetable preservation. And it can extend the shelf life of Saimaiti apricots by 12 days, compared to traditional refrigeration.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978987","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":"Time series analysis of wheat moisture content variations for grain storage systems","authors":"","doi":"10.1016/j.jspr.2024.102395","DOIUrl":"10.1016/j.jspr.2024.102395","url":null,"abstract":"<div><p>The Philippines is one of the many countries that consume and produce wheat grains. Despite having agricultural resources, the country still struggles to supply wheat and continues to import tons of wheat from different countries. Moreover, being a tropical country, the weather conditions exacerbate the parameters in defining grain quality, and thus, impact the preservation of grains in bulk storage systems. This study aims to understand the fluctuations of moisture content over time and its impact on grain quality and identify trends to utilize in optimizing storage systems management practices. Furthermore, this study investigated the moisture content variations, analyzed the temporal dynamics, and forecasted future trends using the ARIMA model, which can effectively handle time series data and has been applied in several agricultural applications. From the correlation patterns from lag intervals of the correlogram, there is a total of 24 ARIMA models generated with varying (p, d, q) values. These models were then evaluated using log-likelihood, AIC, RMSE, and MAE to select the best-performing and most appropriate model for forecasting wheat moisture content data. Out of these 24 models, Models (4,0,3), (4,0,4), and (1,0,0) are the top performing models, however, Model (4,0,3) emerged as a strong forecasting model in predicting wheat moisture content trends for the forthcoming two-year horizon. Its evaluation performance resulted in a log-likelihood of −69.38384, AIC of 156.7677, RMSE of 0.4248, and MAE of 0.30427, having the least values in three of the validation methods. When used in forecasting, the trend of the moisture content continues to consistently fall within the lower end of the accepted range. The distribution of the predicted values also shows a perfectly normal distribution, showing its effectiveness of the model for forecasting. These findings will serve as a guide towards enhancing operational efficiencies and sustainable growth within the flour milling landscape.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945380","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 of Sitophilus oryzae (L.) using argon and helium atmospheric non-thermal plasma","authors":"","doi":"10.1016/j.jspr.2024.102394","DOIUrl":"10.1016/j.jspr.2024.102394","url":null,"abstract":"<div><p>The rice weevil, <em>Sitophilus oryzae</em> Linnaeus, 1763 (Coleoptera: Curculionidae), is a major pest of stored cereals worldwide that causes significant grain loss by feeding internally on seeds. In this study, we propose the use of an atmospheric pressure cold plasma generated from dielectric barrier discharge (DBD) as an emerging technology in insect pest management. Series of experiments were conducted to test the effectiveness of such plasmas on the lethality of adult <em>S. oryzae</em> by measuring the mortality rate and examining the biochemical markers that impact the insects. Plasma treatments (24 kV input voltage at frequency of 2.5 or 7.5 kHz) were carried out in He and Ar, used as carrier gases, with exposure time ranging from 30 to 120 s. Results showed a high level of mortality (60–100%) for each treatment, with a better efficiency observed when Ar was used as carrier gas. Furthermore, at the highest repetition frequency (7.5 kHz), equivalent to 60 W of electrical power consumption, the insecticidal efficiency reached 100% insect mortality at only 1 h after a 30 s plasma treatment. The mortality rate appeared to be correlated with a notable decrease in protein content and an increase in catalase enzyme levels within the insects' tissue, indicating that insecticidal mechanisms involve oxidative stress. This study demonstrates that low-energy atmospheric cold plasma has detrimental effects on rice weevils and could be considered a promising tool for pest control in stored food, which will help reduce global dependence on chemical pesticides.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945378","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":"Mechanical properties and energy evolution mechanism of wheat grain under uniaxial compression","authors":"","doi":"10.1016/j.jspr.2024.102392","DOIUrl":"10.1016/j.jspr.2024.102392","url":null,"abstract":"<div><p>To determine the mechanical properties and energy evolution characteristics of wheat kernels during compression, the mechanical properties and energy evolution of wheat kernels with high-gluten, medium-gluten, and low-gluten were analyzed in uniaxial compression test. Based on the theory of Hertz's formula, the stress-strain laws of the three varieties of wheat kernels in the process of compression damage were investigated; Based on the law of energy conservation, the energy evolution characteristics of the three varieties of wheat kernels under the same compression conditions were analyzed. The results showed that the stress-strain process of wheat kernels with high-gluten, medium-gluten, and low-gluten under compressive stress followed a similar trend overall, with the corresponding minimum failure strengths at the peak being 51.79 MPa, 50.07 MPa, and 46.21 MPa, respectively. The energy evolution patterns of three varieties of wheat kernels under uniaxial compressive loading were approximately the same, indicating that the elastic energy was mainly accumulated before the peak and reached the maximum at the peak. In contrast, the proportion of dissipated energy increases after the peak and rapidly exceeds the elastic energy. In this paper, the damage characteristics of wheat kernels are described from the energy point of view, which is of great significance for the new conceptualization of the evolution of wheat grain damage.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950418","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":"Thermal treatments in controlling Plodia interpunctella (Lepidoptera: Pyralidae) on sunflower seeds and their effect on seed vitality","authors":"","doi":"10.1016/j.jspr.2024.102384","DOIUrl":"10.1016/j.jspr.2024.102384","url":null,"abstract":"<div><p>This work aimed to assess the potential of thermal treatments for controlling <em>P. interpunctella</em> on sunflower seeds, based on its tolerance to high/elevated temperatures and effect on seed vitality. The tests involved mature larvae (L5) and pupae, exposed to 35, 40, 42, 44, 45, 50, 55 and 60 °C, for 15 and 30 min, and 1, 2, 6, 24, 48 h. Larval mortality and survival, Probyt analysis, developmental dynamics, longevity analysis, progeny production and the effect on sunflower seed vitality (germination energy and germination) were assessed. Larval mortality of 75.9% was achieved after 30 min of exposure at 44 °C, 77.0% at 45 °C after 15 min, and 100% after 45 min. At 60 and 65 °C total mortality was achieved already after 15 min of exposure. Lethal exposure time (LT<sub>50</sub>) needed to kill 50% of larval population was 15 min at 44.2 °C, 30 min at 43.3 °C, 45 min at 42.1 °C or 41.8 °C at 60 min, respectively. LT<sub>90</sub> can be achieved after 15 min of exposure at 45.2 °C, 30 min at 44.3 °C, 45 min at 43.3 °C, or 60 min at 42.1 °C. Pupal LT<sub>50</sub> was 15 min at 56.7 °C, 30 min at 53.1 °C, 45 min at 52.4 °C or 60 min at 52.2 °C, while LT<sub>90</sub> was 15 min at 59.7 °C, 30 min at 56.3 °C, 45 min at 56.1 °C or 60 min at 55.6 °C. The fastest development, and the highest progeny production was in treatments when the parenteral population was exposed to 40 °C for 1, 2 and 6 h. The developmental duration was significantly shortened when parenteral population was exposed to 40 °C for 48 h. The temperature and exposure did affect the duration of the adult life stage only when exposed for 2, 3, 6, 24 and 48 h to 40 °C. The germination of sunflower seed (86.7%) was inhibited by heat at 45 °C when exposed for 24 h.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949886","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":"Investigating potential of edible coatings for microbial safety, quality and shelf life extension of fresh cut cucumbers: A statistical optimization approach","authors":"","doi":"10.1016/j.jspr.2024.102393","DOIUrl":"10.1016/j.jspr.2024.102393","url":null,"abstract":"<div><p>Six different edible coatings were evaluated to determine their antimicrobial efficacy and maintenance of physicochemical properties of fresh cut cucumber. Assessment of coatings showed chitosan and pectin had at par antimicrobial efficacy significantly higher than other coatings over fresh cut cucumber while maintaining their nutritive and physicochemical characteristics. However, minimum microbial load was found on chitosan coated fresh cut cucumber even after 9 days of storage. Therefore, chitosan was selected for further optimization of coating conditions i.e dipping time and coating concentration that was statistically designed and executed using Response Surface Methodology. Optimization studies discovered that fresh cut cucumber dipped in 1% w/v chitosan solution for 5 min had minimum microbial load even after 12 days of storage besides maintaining physicochemical properties, thus extending its shelf life. Validation studies and shelf life analysis of pretreated chitosan coated fresh cut cucumber were performed and results revealed that chitosan coated fresh cut cucumber can be consumed up to 12 days while maintaining its physicochemical, microbiological and sensorial characteristics.</p></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949885","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}