scholarly journals Natural Entomophages of Brevicoryne Brassicae (L.) (Hemiptera: Aphididae) in Uzbekistan

2019 ◽  
Vol 11 (4) ◽  
pp. 42
Author(s):  
Kahramon B. Razzakov ◽  
Ikram. I. Abdullaev ◽  
Ko’pal O. Saparboev ◽  
Mavluda M. Allaberganova
Keyword(s):  
Coccinella Septempunctata ◽  
Early Spring ◽  
Brevicoryne Brassicae ◽  
Episyrphus Balteatus ◽  
Cabbage Aphid ◽  
Reproductive Ability ◽  
Chrysopa Carnea ◽  
Biological Effectiveness ◽  
Cabbage Aphids ◽  
Phenological Phases

In our studies phenological phases of cabbage aphids Brevicoryne brassicae (L.) were studied. The influence of external factors (humidity and temperature) was studied under laboratory conditions. The maximum reproductive ability of cabbage aphids was noted in spring and autumn. Some of the parthenogenetic aphids gave about 82 larvae. The daily reproductive ability of aphids was 3-5, and the maximum 5-11. When studying the reproductive ability of parthenogenetic aphids, this indicator was slightly lower than that of the wingless aphids (average 28, maximum 51). The overall development of cabbage aphid seeds averaged 7–9 days in summer and 12–21 days in early spring and autumn. The importance and bioecological features of Metamorphus corollae (F.), Episyrphus balteatus (De Geer, 1776), Syrphus vitripennis (Meigen, 1822), Scaeva pyrastri (L.) Coccinella septempunctata (L.) and Adonia variegata (G.), Chrysopa carnea Steph. with natural control of the cabbage aphid were studied. Studying the biological effectiveness of a simple golden-eyed fly in relation to the cabbage bug, efficiencies were observed at a ratio of II-year-old larvae of simple golden-eyed and cabbage bug in a ratio of 1:5 and 1:10. For 4 day old gold-eyed eggs, this efficiency was observed when the ratio with cabbage bug was 1:1 on the 17th day of the experiment.

scholarly journals Field Screening of Seven Cultivars of Cabbage Against Cabbage Butterfly (Pieris brassicae) and Cabbage Aphids (Brevicoryne brassicae) at Gkuleshor, Baitadi, Nepal

2020 ◽  
Vol 14 (1) ◽  
pp. 63-67
Author(s):  
Narendra Bahadur Singh ◽  
Santosh Dhungana ◽  
Srijana Adhikari ◽  
Dipesh Chapagain ◽  
Nawaraj Ghimire ◽  
...  
Keyword(s):  
Population Density ◽  
Pieris Brassicae ◽  
Brevicoryne Brassicae ◽  
Animal Science ◽  
Field Screening ◽  
Cabbage Aphid ◽  
Cabbage Butterfly ◽  
Science College ◽  
Butterfly Population ◽  
Cabbage Aphids

Field screening of seven cultivars of cabbage namely: Green Crown, Green Top, Green Coronet, Pioneer, Nepa Round, Copenhagen Market and Golden Acre were carried out against cabbage butterfly (Pieris brassicae) and cabbage aphid (Brevicoryne brassicae) at the research farm of entomology section, Gokuleshwor Agriculture and Animal Science College, Baitadi in RCBD design from October 2017 to February 2018. Five plants were tagged randomly after transplanting in field excluding border plants in each plot. Data were collected for the population dynamics of cabbage butterfly larvae and cabbage aphid on weekly basis. None of the seven cultivars were found resistant to cabbage butterfly and cabbage aphid, however their population density varied on tested cultivars. Cabbage butterfly population was recorded the highest on the cultivar Pioneer (22.88 larvae/plant) and the lowest on the cultivar Copenhagen Market (10.06 larvae/plant), and other cultivars were of intermediate types. Similarly, the population density of aphid ranged from 36.70 to 105.58 aphids/leaf. The highest population density of aphid was recorded on cultivar Green Crown (105.58 aphids/leaf) and the lowest on cultivar Copenhagen Market (39.82 aphids/leaf. From the results, Copenhagen Market proved to be the best against both cabbage butterfly and cabbage aphids.

REPRODUCTION AND LONGEVITY OF CABBAGE APHID, BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE), PARASITIZED BY DIAERETIELLA RAPAE (HYMENOPTERA: APHIDIIDAE)

1984 ◽  
Vol 116 (12) ◽  
pp. 1605-1610 ◽  
Author(s):  
M. Mackauer ◽  
S. Kambhampati
Keyword(s):  
Adult Stage ◽  
Variable Number ◽  
Reproductive Period ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Linear Regression Equation ◽  
Cabbage Aphid ◽  
Total Fecundity ◽  
The Mean ◽  
Cabbage Aphids

AbstractParasitized cabbage aphids, Brevicoryne brassicae (Linnaeus), produced fewer offspring than unparasitized aphids. Aphids parasitized by Diaeretiella rapae (M'Intosh) during the first, second, or third instar died before producing any offspring; those parasitized during the fourth instar or the adult stage produced a variable number of offspring. The aphid's survival time was correlated with the rate of development, as measured by the length of the pre-reproductive period. A multiple-linear-regression equation is provided for predicting the mean total fecundity of parasitized cabbage aphids from the host age at the beginning of parasitism and the pre-reproductive period.

scholarly journals Cabbage aphid Brevicoryne brassicae Linnaeus (Insecta: Hemiptera: Aphididae)1

EDIS ◽  
2013 ◽  
Vol 2013 (10) ◽  
Author(s):  
Harsimran Kaur Gill ◽  
Harsh Garg ◽  
Jennifer L. Gillett-Kaufman
Keyword(s):  
Brevicoryne Brassicae ◽  
Control Measures ◽  
Yield Losses ◽  
Comprehensive Understanding ◽  
Cabbage Aphid ◽  
Fact Sheet ◽  
The Family ◽  
Significant Yield ◽  
Cabbage Aphids

Cabbage aphids cause significant yield losses to many crops of the family Brassicaceae, which includes the mustards and crucifers. It is important to have a comprehensive understanding of this pest and its associated control measures so that its spread and damage can be prevented. This 5-page fact sheet was written by Harsimran Kaur Gill, Harsh Garg, and Jennifer L. Gillett-Kaufman, and published by the UF Department of Entomology and Nematology, October 2013. http://edis.ifas.ufl.edu/in1014

scholarly journals Effect of aqueous extracts of black alder (Alnus glutinosa (LINNAEUS, 1753) GAERTNER, 1791) and elder (Sambucus nigra LINNAEUS, 1753) on the occurrence of Brevicoryne brassicae LINNAEUS, 1758 (Hemiptera, Aphidoidea), its parasitoid Diaeretiella rapae (M’INTOSH, 1855) (Hymenoptera, Ichneumonoidea) and predatory Syrphidae on white cabbage

2016 ◽  
Vol 85 (2) ◽  
pp. 237-246
Author(s):  
Beata Jankowska ◽  
Elżbieta Wojciechowicz-Żytko
Keyword(s):  
Alnus Glutinosa ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Botanical Insecticides ◽  
Aqueous Extracts ◽  
Sambucus Nigra ◽  
Episyrphus Balteatus ◽  
Cabbage Aphid ◽  
Black Alder ◽  
White Cabbage

Abstract The insecticidal and antifeedant effects of aqueous extracts from two common plants (black alder Alnus glutinosa and elder Sambucus nigra) on the occurrence of Brevicoryne brassicae, its parasitoid Diaeretiella rapae and predatory Syrphidae on white cabbage were investigated in 2008-2009. Both extracts reduced the number of cabbage aphids, although the Sambucus nigra extract proved to have a better effect. Differences were seen both in the numbers of winged aphids settling on plants and in the overall numbers of aphids on plants during the entire season. There were no significant differences in the degree of parasitization by Diaeretiella rapae in the three experimental combinations. Eight species of Syrphidae were found in the Brevicoryne brassicae colonies: Episyrphus balteatus, Sphaerophoria scripta, S. rueppelli, S. menthastri, Eupeodes corollae, Scaeva pyrastri, Scaeva selenitica and Syrphus vitripennis. The dominant species was Episyrphus balteatus. The largest numbers of syrphid larvae and pupae were collected from cabbage aphid colonies on the control plants. Smaller numbers were recorded on the plot where the cabbages were sprayed with the Sambucus nigra extract. The results of this study indicate that botanical insecticides based on S. nigra have the potential to be incorporated into control programmes for the cabbage aphid.

scholarly journals Energy reserves in Brevicoryne brassicae (Lin.) (Homoptera: Aphididae) instars and their effect on predation and longevity of three coccinellid species under laboratory conditions

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Salama Ibrahim Askar ◽  
Monir Mohamed El Husseini
Keyword(s):  
Larval Stage ◽  
Average Rate ◽  
Coccinella Septempunctata ◽  
Brevicoryne Brassicae ◽  
Energy Reserve ◽  
Main Body ◽  
Nymphal Instar ◽  
Cabbage Aphid ◽  
Control Programs ◽  
Biological Performance

Abstract Background Contents of carbohydrates, protein, and lipids in tissues of insect prey constitute the required energy reserve utilized by their predators. Their amounts define the preference of the predator to certain prey on which its biological performance is the optimum. Feeding preferences and longevity of the 3 coccinellid beetles; Coccinella septempunctata L., C. undecimpunctata L., and Scymnus interruptus L. were studied in relation to energy reserve in tissues of the cabbage aphid, Brevicoryne brassicae (Lin.). Main body The level of energy reserve increased with increasing of aphid nymphal instars showing the highest in 4th instar (0.10844 cal/mg). Lipids and carbohydrates represented the highest energy reserve average rate in B. brassicae adults (0.29139 and 0.07404 cal/mg), respectively. C. septempunctata larval stage recorded the highest efficiency in daily predation (89.42 prey), when fed on 1st instar nymphs of the aphid. It required 21 days when fed on the 3rd nymphal instar of B. brassicae. S. interruptus larval stage reflected the lowest consumption and longevity in predation where it consumed less than 69.25 prey/day and lasted a period less than 17.5 days. Generation time for C. undecimpunctata lasted the longest (20.89 days) when fed on B. brassicae 1st nymphal instar. It was decreased in S. interruptus recording (12.22 days) when fed on B. brassicae 3rd nymphal instar. Conclusion Only C. septempunctata was efficient in predation and its biological performance was the best compared to the other tested coccinellid species. Use of C. septempunctata can be recommended when applying biological control programs in the field against the cabbage aphid.

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