scholarly journals Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2820
Author(s):  
Chenxu Zhu ◽  
Ming Zhao ◽  
Haibo Zhang ◽  
Fang Zhang ◽  
Yuzhou Du ◽  
...  
Keyword(s):  
Cold Storage ◽  
Storage Time ◽  
Variable Temperature ◽  
Mass Rearing ◽  
Storage Conditions ◽  
Control Group ◽  
Egg Hatch ◽  
Hatch Rate ◽  
Large Numbers ◽  
Important Pest

Clanis bilineata tsingtauica Mell, 1922 (Lepidoptera, Sphingidae), also known as “Doudan” in China, is an important pest in legume crops. As an edible insect, it is most commonly consumed in Jiangsu, Shandong, and Henan Provinces. Mass rearing requires access to large numbers of eggs. This stage, however, is of short duration and supplies are frequently not sufficient for insect production. Therefore, we identified the cold storage conditions for C. bilineata tsingtauica that can effectively prolong the storage time of the eggs, to make supplies more readily available. We found that when stored at 4 °C, only 7.5% of the eggs hatched after 7 days, while at 10 °C the hatch rate was 78.3%. At 15 °C, the egg hatch rate remained at this same level (77.8% even after 14–20 days). Considering various combinations, we found that optimal egg hatch occurred if eggs were stored at 15 °C for 11 days, and then held at 15–20 °C under dark conditions. Stored as described above, the egg hatch rate was not significantly different from the control group (at 28 °C). These conditions allow for easier mass rearing of C. bilineata tsingtauica by providing a stable supply of eggs.

scholarly journals Cold Storage Effects on Fitness of the Whitefly Parasitoids Encarsia sophia and Eretmocerus hayati

Insects ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 428
Author(s):  
Dawit Kidane ◽  
Marco Ferrante ◽  
Xiao-Ming Man ◽  
Wan-Xue Liu ◽  
Fang-Hao Wan ◽  
...  
Keyword(s):  
Cold Storage ◽  
Storage Time ◽  
Pupal Stage ◽  
Mass Rearing ◽  
Biocontrol Agents ◽  
Emergence Time ◽  
Large Numbers ◽  
Encarsia Sophia ◽  
Storage Effects ◽  
Storage Temperatures

Successful biological control of the whitefly Bemisia tabaci involves the mass rearing of biocontrol agents in large numbers for field release. Cold storage of the biocontrol agents is often necessary to provide a sufficient number of biocontrol agents during an eventual pest outbreak. In this study, the fitness of two whitefly parasitoids Encarsia sophia Girault and Dodd (Hymenoptera: Aphelinidae) and Eretmocerus hayati Zolnerowich and Rose (Hymenoptera: Aphelinidae) was evaluated under fluctuating cold storage temperatures. The emergence rate of old pupae of either species was not affected when stored at 12, 10, 8 and 6 °C for 1 week. Cold storage had no effect on the longevity of the emerging adult En. sophia except young pupae stored at 4 °C, while Er. hayati was negatively affected after 2 weeks of storage time at all temperatures. Parasitism by adults emerging from older pupae stored at 12 °C for 1 week was equivalent to the control. Combined with the results for the emergence time, we suggest that the old pupal stage of En. sophia and Er. hayati could be stored at 12 and 10 °C, respectively (transferred every 22 h to 26 ± 1 °C for 2 h), for 1 week, with no or little adverse effect.

scholarly journals Effects of Soy Sauce and Some Other Additives on Lipid Oxidation and Its Related Properties of Minced Beef Meat During Cold Storage

2021 ◽  
Vol 910 (1) ◽  
pp. 012053
Author(s):  
Rabeea M. Mahmood ◽  
Amera Mohammed Saleh ◽  
Saleh Abed Al Wahed Mahdi
Keyword(s):  
Ascorbic Acid ◽  
Cold Storage ◽  
Meat Products ◽  
Storage Period ◽  
Natural Antioxidants ◽  
Storage Conditions ◽  
Soy Sauce ◽  
Control Group ◽  
Fat Percentage ◽  
Moisture Percentage

Abstract This study was designed to investigate the effects of soy sauce and some other antioxidants on some of important meat and meat products properties in cold storage conditions. Five treatment were demanded. Control group without any kind of adding. NaCl treatment with adding 10% NaCl solution. SS treatment with adding 10% soy sauce solution. NaCl+SS treatment with adding 5% NaCl+5%soy sauce solutions. And the last SS+Asc treatment with adding 10% soy sauce solution+0.05% ascorbic acid. samples in all treatment divided to groups and been exposed to five storage period (0,3,6,9,12) days at 4oc. to study the effect of treatments and storage periods on twelve properties (pH, WHC, Drip loss, Mb concentrations, TVN, TBA, P.V, FFAs, moisture percentage, protein percentage, fat percentage and ash percentage). The results showed a benefit in all studied properties related with using soy sauce with or without ascorbic acid. These natural antioxidant material may be considered as an effective natural antioxidants and good replacement instead of synthetic types.

scholarly journals Effect of Lysozyme Treatment on Quality and Bacterial Contamination of Chilled Chicken Legs

2013 ◽  
Vol 57 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Jacek Kijowski ◽  
Celina Marciszewska ◽  
Renata Cegielska-Radziejewska ◽  
Anna Popiół
Keyword(s):  
Cold Storage ◽  
Storage Time ◽  
Sensory Quality ◽  
Bacterial Count ◽  
Storage Conditions ◽  
Poultry Meat ◽  
Inhibition Of Growth ◽  
Fold Reduction ◽  
Microbiological Stability ◽  
Chicken Legs

AbstractThe effect of spraying lysozyme solutions of varying activity on microbiological stability and organoleptic features of chicken legs with skin was investigated. Lysozyme was applied at concentrations ranging from 3,000 to 48,000 U/mL. The effect of storage time at 4oC on the total aerobic bacterial count, coli titre, occurrence of enterococci, anaerobic spore forming bacilli, and pathogenic staphylococci was analysed along with the examination of sensory quality attributes. The investigations showed that the addition of lysozyme resulted in a considerable inhibition of growth of the initial aerobic bacterial counts and a limitation of disadvantageous organoleptic changes during cold storage of the legs. The lysozyme solution with the activity of 48,000 U/mL caused a 20-fold reduction in the initial aerobic bacterial count. Sensory examination showed that samples subjected to the action of lysozyme and stored for 120 h under cold storage conditions did not differ qualitatively from fresh legs. The obtained results revealed that lysozyme might be an effective agent extending shelf-life of portioned poultry meat.

scholarly journals Anthocyanin Concentration of “Assaria” Pomegranate Fruits During Different Cold Storage Conditions

2004 ◽  
Vol 2004 (5) ◽  
pp. 338-342 ◽  
Author(s):  
Graça Miguel ◽  
Catarina Fontes ◽  
Dulce Antunes ◽  
Alcinda Neves ◽  
Denise Martins
Keyword(s):  
Cold Storage ◽  
Storage Time ◽  
Storage Conditions ◽  
Anthocyanin Content ◽  
Total Anthocyanin ◽  
Total Anthocyanin Content ◽  
Anthocyanin Concentration ◽  
External Standard ◽  
Peak Areas ◽  
South Portugal

The concentration of anthocyanins in fruits of “Assaria” pomegranate, a sweet Portuguese cultivar typically grown in Algarve (south Portugal), was monitored during storage under different conditions. The fruits were exposed to cold storage (5∘C) after the following treatments: spraying with wax; spraying with1.5% CaCl2; spraying with wax and1.5% CaCl2; covering boxes with 25μc thickness low-density polyethylene film. Untreated fruits were used as a control. The anthocyanin levels were quantified by either comparison with an external standard of cyanidin 3-rutinoside (based on the peak area) or individual calculation from the peak areas based on standard curves of each anthocyanin type. The storage time as well as the fruit treatment prior to storage influenced total anthocyanin content. The highest levels were observed at the end of the first month of storage, except for the fruits treated with CaCl2, where the maximal values were achieved at the end of the second month. The anthocyanin quantification method influenced the final result. When total anthocyanin was calculated as a sum of individual pigments quantified based on standard curves of each anthocyanin type, lower values were obtained.

scholarly journals Effect of storage conditions, preservative levels and packing materials on ascorbic acid juice of mandarin cv. Nagpur Santra

2020 ◽  
pp. 38-41
Author(s):  
Zaki Ahmad Faizi
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Cold Storage ◽  
Nutritional Value ◽  
Storage Time ◽  
Storage Period ◽  
Storage Conditions ◽  
Packaging Materials ◽  
Glass Bottle ◽  
Pet Bottles

The research was done with the aim of considering vitamin C affectability under different storage conditions and packages at the post-harvest center of Mpkv, Rahuri Agricultural University in India. Juice of Nagpur Santra in three packaging materials glass bottles of 200 mL (B1), pet bottles of 200 mL (B2) and standy pouches (B3) which were added sodium benzoate as preservative substance in three levels 150 ppm (P1), 250 ppm (P2) and 350 ppm (P3), were kept in roam temperature range 19 to 28°C (S1) and cold storage 5±2°C (S2) were used for vitamin C consideration at days 30, 60, 90, 120, 150 and 180 of storage period. Results showed that ascorbic acid of Nagpur Santra juice was significantly influenced by storage conditions, preservative levels, packaging materials and their -1 interactions. The ascorbic acid (AA) of fresh juice was 43.46 mg 100 mL . During storage AA was found to be decreased in all the treatment combinations. However, the rate was faster under ambient condition (S1) as compared to cold storage (S2) condition. The minimum decrease in AA of juice was found in high preservative level when packed in glass bottle and stored in cold storage. The maximum AA was recorded in S2P3B1 (35.21 mg 100 mL-1) followed by S2P3B2 (34.23 mg 100 mL-1) at 180 days of storage. The minimum AA was recorded in S1P1B3 (23.69 mg 100 mL-1) followed by S1P1B2 (24.60 mg 100 mL-1) at 90 days of storage period and afterward it spoiled. It can be said due to high quantity of AA in Nagpur Santra even after long period of storage time the level of AA of mentioned fruit juice was at acceptable level from view point of nutritional value.

Effect of DNA Gyrase Inhibitors in the Nl Diet on Biological Fitness of the Western Tarnished Plant Bug (Heteroptera: Miridae)

2008 ◽  
Vol 43 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Douglas A. Streett ◽  
Xinzhi Ni ◽  
Amanda M. Lawrence
Keyword(s):  
Nalidixic Acid ◽  
Dna Gyrase ◽  
Mass Rearing ◽  
Oxolinic Acid ◽  
Egg Hatch ◽  
Tarnished Plant Bug ◽  
Hatch Rate ◽  
The Cost ◽  
Gyrase Inhibitors

Addition of 3 DNA-gyrase inhibitors (i.e., novobiocin, nalidixic acid and oxolinic acid) individually to the Nl (New and Improved) oligidic diet for plant bugs was investigated to assess their effect on the biological fitness of Lygus hesperus Knight (Heteroptera: Miridae). Biological fitness was measured by the number, biomass, sex ratio, daily egg count per female, and the egg hatch rate. All measures of biological fitness were not significantly different among the controls and the 3 inhibitors, which demonstrated that the inhibitors can effectively replace present antibiotics for a less expensive diet. Females reared on the Nl diet with novobiocin and oxolinic acid showed increased fecundity in comparison with the diet with nalidixic acid, but the types of inhibitors had no effect on egg hatch rate. Furthermore, the egg hatch rate during the first 12 d after oviposition produced the most viable eggs, with the highest hatch rate between the 2nd and 9th days after oviposition commenced, which is comparable to the current egg-collection period used for the L. hesperus colony. These inhibitors could replace the antibiotics currently used in the Nl diet and reduce the cost for diet preservation without sacrificing the quality of the insects in the mass-rearing facility.

The Effect of Photoperiods and Light Intensity on Mating Behavior and Reproduction of Grapholita molesta (Lepidoptera: Tortricidae)

2019 ◽  
Vol 48 (5) ◽  
pp. 1035-1041 ◽  
Author(s):  
Xianwei Li ◽  
Xiaoting Jia ◽  
Huiming Xiang ◽  
Hongliang Diao ◽  
Yu Yan ◽  
...  
Keyword(s):  
Light Intensity ◽  
Mating Behavior ◽  
Courtship Behavior ◽  
Abiotic Factors ◽  
Northern China ◽  
Oriental Fruit Moth ◽  
Grapholita Molesta ◽  
Egg Hatch ◽  
Hatch Rate ◽  
Important Pest

Abstract Oriental fruit moth, Grapholita molesta (Busck), is a worldwide pest and is the dominant pest of rosaceous plants in northern China. Little is known, however, about the influence of abiotic factors on the daily life history events of this economically important pest, so here we evaluated the effect of different photoperiods (L:D) (0:24; 2:22; 4:20; 6:18; 8:16; 10:14; 12:12; 14:10; 15:9 [control]; 16:8; 18:6; 20:4; 22:2; and 24:0 h) and light intensities (50, 100, 200, 300, 400, and 500 lux) on the mating behavior and reproduction of oriental fruit moth. We found that oriental fruit moth adults with an 8, 9, or 10 h scotophase showed considerably more courtship behavior than those in other photoperiod treatments. Meanwhile, male fanning and male ‘crawling in a circle’ behaviors significantly decreased with increasing light intensity. Neither female or male oriental fruit moth longevity nor the egg hatch rate were influenced by photoperiod (P = 0.146; 0.271; 0.107) or light intensity (P = 0.268; 0.08; 0.123). In both photoperiod and light intensity treatments (P < 0.05), the number of eggs laid daily by females was significantly influenced by female age, decreasing with greater age. Female oriental fruit moth lifetime fecundity was influenced by photoperiod, with the 9, 10, 16, 18, and 22 h scotophase periods having higher fecundity than other treatments. Meanwhile, fecundity decreased with increasing light intensity.

scholarly journals Microbial Growth Study on Pork Loins as Influenced by the Application of Different Antimicrobials

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 968
Author(s):  
David A. Vargas ◽  
Markus F. Miller ◽  
Dale R. Woerner ◽  
Alejandro Echeverry
Keyword(s):  
Storage Time ◽  
Microbial Growth ◽  
Storage Conditions ◽  
Indicator Bacteria ◽  
Aerobic Bacteria ◽  
Growth Study ◽  
Treatment Interventions ◽  
Pork Industry ◽  
Bacterial Enumeration ◽  
The Impact

The use of antimicrobials in the pork industry is critical in order to ensure food safety and, at the same time, extend shelf life. The objective of the study was to determine the impact of antimicrobials on indicator bacteria on pork loins under long, dark, refrigerated storage conditions. Fresh boneless pork loins (n = 36) were split in five sections and treated with antimicrobials: Water (WAT), Bovibrom 225 ppm (BB225), Bovibrom 500 ppm (BB500), Fit Fresh 3 ppm (FF3), or Washing Solution 750 ppm (WS750). Sections were stored for 1, 14, 28, and 42 days at 2–4 °C. Mesophilic and psychrotrophic aerobic bacteria (APC-M, APC-P), lactic acid bacteria (LAB-M), coliforms, and Escherichia coli were enumerated before intervention, after intervention, and at each storage time. All bacterial enumeration data were converted into log10 for statistical analysis, and the Kruskal–Wallis test was used to find statistical differences (p < 0.05). Initial counts did not differ between treatments, while, after treatment interventions, treatment WS750 did not effectively reduce counts for APC-M, APC-P, and coliforms (p < 0.01). BB500, FF3, and WS750 performed better at inhibiting the growth of indicator bacteria when compared with water until 14 days of dark storage.

scholarly journals Pengaruh Perlakuan Waktu dan Suhu Penyimpanan Dingin terhadap Mutu Kubis Bunga (Brassica Oleracea Var. Botrytis L.)

2019 ◽  
Vol 8 (1) ◽  
pp. 138
Author(s):  
Chyntia Wulandari Eka Saputri ◽  
I. A. Rina Pratiwi Pudja ◽  
Pande Ketut Diah Kencana
Keyword(s):  
Weight Loss ◽  
Shelf Life ◽  
Cold Storage ◽  
Storage Time ◽  
Consumption Rate ◽  
Storage Temperature ◽  
Treatment Time ◽  
O2 Consumption ◽  
Damage Level ◽  
Four Levels

Tujuan dari penelitian ini adalah untuk menentukan waktu perlakuan optimal dan suhu penyimpanan dingin untuk mutu kubis bunga. Penelitian ini menggunakan rancangan acak lengkap (RAL) yang terdiri dari dua faktor, faktor pertama adalah suhu yang digunakan dan faktor kedua adalah waktu selama show case. Faktor pertama terdiri dari dua level, yaitu (P1): show case temperature 8oC, dan (P2): show case temperature 15oC dan tambah kontrol (P0). Faktor kedua terdiri dari empat level, yaitu (A0): penyimpanan selama 0 jam, (A1): penyimpanan selama 12 jam, (A2): penyimpanan selama 16 jam, (A3): penyimpanan selama 20 jam dan diulang untuk 3 kali ulangan. Kubis bunga sebagai kontrol disimpan pada suhu kamar (28 ± 1 ?). Parameter kualitas yang diamati dalam penelitian ini termasuk penurunan berat badan, tingkat konsumsi O2, warna (warna berbeda), uji organoleptik termasuk umur simpan dan tingkat kerusakan. Hasil penelitian menunjukkan parameter penurunan susut bobot, laju konsumsi O2, warna, umur simpan, tingkat kerusakan pada suhu perlakuan suhu terbaik adalah suhu 8 ? dan waktu penyimpanan 20 jam (P1A3).Kata kunci: kembang kol, waktu penyimpanan, suhu penyimpanan dingin   The purpose of this study was to determine the optimal treatment time and cold storage temperature for the quality of cabbage flowers. This study uses a completely randomized design (CRD) consisting of two factors, the first factor is the temperature used and the second factor is the time during the showcase. The first factor consists of two levels, namely (P1): showcase temperature of 8oC, and (P2): showcase temperature of 15oC and added a control (P0). The second factor consists of four levels, namely (A0): storage for 0 hours, (A1): storage for 12 hours, (A2): storage for 16 hours, (A3): storage for 20 hours and repeated for 3 replications. Flower cabbage as control was stored at room temperature (28 ± 1 ?). The quality parameters observed in this study included weight loss, O2 consumption rate, color (color different), organoleptic tests including shelf life and damage level. The results showed the parameters of weight loss, O2 consumption rate, color, shelf life, damage rate at the best temperature of 8 ? and storage time of 20 hours (P1A3). Keywords: cauliflower, storage time, cold storage temperature

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