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 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 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

scholarly journals Cold storage and gamma irradiation of Sitotroga cerealella Olivier eggs (Lepidoptera: Gelechiidae) in relation to the success of parasitism by Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae)

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Naglaa F. Abdel-Hameid ◽  
I. R. M. Elzoghby ◽  
A. L. Mehany ◽  
W. A. A. Sayed
Keyword(s):  
Gamma Irradiation ◽  
Cold Storage ◽  
Mass Rearing ◽  
Egg Parasitoid ◽  
Sitotroga Cerealella ◽  
Trichogramma Evanescens ◽  
Control Programs ◽  
Angoumois Grain Moth ◽  
Rearing Techniques ◽  
The Times

AbstractThe performance of parasitism by the egg parasitoid, Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) on eggs of Angoumois grain moth, Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae) was investigated under cold storage and gamma irradiation treatments of the host eggs. Cold storage treatment could improve the parasitoid mass rearing techniques and reduced the costs of biological control programs, while gamma irradiation might be used as a supplementary support at the times of high demand. The suitability of the S. cerealella eggs, stored at – 20 °C for 0.5, 1, or 2 h. as a host for T. evanescens was evaluated. The sensitivity of S. cerealella eggs to gamma irradiation treatments and the acceptability of irradiated eggs for parasitism by T. evanescens females for the parental P and F1 generations were examined. The results revealed that parasitism was drastically reduced more than adult’s emergence and sex-ratio (% of females) after cold storage periods of S. cerealella eggs. Moreover, the parasitism percentages were relatively reduced to (97.1, 96.1, 93.03, and 92.7 %) after irradiating the S. cerealella eggs at 40, 60, 80, and 100 Gy, respectively than the control (97.3% emergence). The percentages of emergence and females’ percent were slightly decreased by gamma irradiation doses, while, equal preferred by the F1 generation of parasitoid that produced from irradiated S. cerealella eggs.

scholarly journals Estimation of Postharvest Quality of “Red Delicious” Apple Fruits Based on Fruit Nutrient Elements Composition

2016 ◽  
Vol 9 (1) ◽  
pp. 164
Author(s):  
Mahshid Doryanizadeh ◽  
Mahmood Ghasemnezhad ◽  
Atefeh Sabouri
Keyword(s):  
Respiration Rate ◽  
Cold Storage ◽  
Ethylene Production ◽  
Storage Time ◽  
Postharvest Quality ◽  
Mineral Nutrient ◽  
Nutrient Elements ◽  
Total Anthocyanin ◽  
Positive Significant Correlation ◽  
Apple Fruits

<p>Fruit nutrient elements content during harvest could considerably effect on postharvest life of apples. In this study, apple fruits cultivar Red Delicious were harvested at the commercial maturity stage at 20 commercial orchards. Fruits were divided into three groups according to peel color; dark red, medium and light red. The mineral elements nutrient content such as nitrogen, phosphorus, potassium, calcium and magnesium and their ratios were measured in the harvested fruits. Thereafter, fruits were places in the cold storage at 0 °C and relative humidity of 90% for 4 months. The characteristics such as fruits weight loss, firmness, TSS, dry matter, total anthocyanin content, antioxidant activity, respiration rate and ethylene production were measured at the end of storage. The results showed a positive significant correlation between fruit firmness at the end of storage time with N+K:Ca, K+Mg:Ca, K:Ca and Mg:Ca ratios. Furthermore, a negative significant correlation was found between total anthocyanin with Nitrogen content, Mg:Ca and N:Ca ratios. The results also showed a positive significant correlation between fruit respiration rate and Nitrogen, N+K:Ca and N:Ca ratios. The analysis of regression based on mean values of three red apple groups showed a significant negative correlation between total anthocyanin with fruit ethylene production at the storage time and Mg:Ca ratio. The relationship between these two variables and Anthocyanin was expressed by the equation of regression: Anthocyanin = 100.22–1.651 Ethylene–43.963 Mg:Ca. Overall, the results confirm that measurement of fruit mineral composition during harvest time could be a strategy for predicting postharvest behaviors of apple fruits at the cold storage. Also the results showed that a relationship between mineral nutrient composition and the characteristics such as firmness, anthocyanin, respiratory rate in apple fruits.</p>

scholarly journals Effect of different shares of protein feeds in diets and of cold storage time on the physical properties of broiler chicken’s meat

2020 ◽  
Vol 21 (1) ◽  
pp. 7-13
Author(s):  
Anna Milczarek ◽  
Maria Osek ◽  
Elżbieta Horoszewicz ◽  
Roman Niedziółka
Keyword(s):  
Physical Properties ◽  
Cold Storage ◽  
Storage Time

scholarly journals Armazenamento úmido e seco de rosas cortadas

2016 ◽  
Vol 22 (2) ◽  
pp. 166
Author(s):  
Gláucia Moraes Dias ◽  
José Maria Monteiro Sigrist ◽  
Patricia Cia ◽  
Sylvio Luís Honório
Keyword(s):  
Cold Storage ◽  
Storage Time ◽  
Tap Water ◽  
Cut Flower ◽  
Dry Storage ◽  
Wet Storage ◽  
The World ◽  
Stem Quality

Rosa sp. is the leading cut flower commercialized in Brazil and in the world; and to maintain stem quality it should be stored at 1 °C, however, there are still doubts about the storage of roses, especially whether the stems should be cold stored in water before marketing. In order to assess the feasibility of wet and dry storage, rose stems, ‘Avalanche’ were stored for 28 days in both conditions at 1 ± 2 °C / 95% RH. Weekly stems batches were transferred to 25 °C / 70% RH and kept in vessels containing tap water for postharvest assessment. It was observed that the decrease in the quality of the roses was inversely proportional to the storage time in both treatments. Although wet storage can occur for up to 21 days, when you need to store roses for a week or two, cold storage in dry condition is advised since it is more economical and viable for the producer.

Apple fruit texture QTLs: year and cold storage effects on sensory and instrumental traits

2015 ◽  
Vol 11 (6) ◽  
Author(s):  
Inès Ben Sadok ◽  
Aline Tiecher ◽  
Didiana Galvez-Lopez ◽  
Marc Lahaye ◽  
Pauline Lasserre-Zuber ◽  
...  
Keyword(s):  
Cold Storage ◽  
Apple Fruit ◽  
Fruit Texture ◽  
Storage Effects

scholarly journals COLD TOLERANCE OF BANANA FRUITS OF DIFFERENT CULTIVARS

2016 ◽  
Vol 29 (3) ◽  
pp. 629-641 ◽  
Author(s):  
JOÃO ALISON ALVES OLIVEIRA ◽  
LUIZ CARLOS CHAMHUM SALOMÃO ◽  
DALMO LOPES DE SIQUEIRA ◽  
PAULO ROBERTO CECON
Keyword(s):  
Relative Humidity ◽  
Low Temperature ◽  
Cold Storage ◽  
Room Temperature ◽  
Storage Time ◽  
Chilling Injury ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Average Temperature ◽  
C Storage

ABSTRACT The objective of this work was to evaluate the tolerance of fruits of different banana cultivars to low temperature storages. Fruits of the cultivars Nanicão (AAA), Prata (AAB), Vitória (AAAB), Maçã (AAB) and Caipira (AAA) were used. Clusters of three fruits were kept in cold storage for 7, 14 and 21 days, with average temperature of 10.53±0.37°C and relative humidity of 85%. Subsequently, the clusters were transferred to temperatures of 22±0.39°C and evaluated for 16 days. The fruits of all cultivars remained green after 21 days of storage at 10.53±0.37°C. Fruits of the cultivar Nanicão did not completely ripened after transferred to the 22°C storage, when stored for 7 days at low temperature. These fruits were firmer, with green peel and low soluble solids and titratable acidity. The fruits of all cultivars complete the ripening when transferred to room temperature after 21 days of cold storage. Chilling injuries increased with cold storage time in all cultivars. The cultivars Nanicão, Caipira and Maçã had more symptoms of chilling injury, while Prata and Vitória were more tolerant to the cold storage (10.53°C) for up to 21 days, showing normal ripening after transferred to the 22±0.39°C storage.

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