Acta Scientific Agriculture (ASAG)(ISSN: 2581-365X)

Research Article Volume 6 Issue 11

Biology and Demographic Parameters of Diaeretiella Rapae (McIntosh) against Brevicoryne Brassicae (L.)

Tanvi Sharma, SC Verma, PL Sharma, RS Chandel, Tanuja Banshtu*, Shikha Katoch, Nidhi Sharma and Priyanka Sharma

Department of Entomology, Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh, India

*Corresponding Author: Tanuja Banshtu, Department of Entomology, Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh, India.

Received: May 23, 2022; Published: October 04, 2022


The cabbage aphid, Brevicoryne brassicae (Hemiptera: Aphididae), is a cosmopolitan insect pest that attacks cruciferous crops. It causes plant deformities, stunting, or killing of young plants thereby resulting in 35-75 per cent yield losses. The present investigation was conducted during 2020-2021 at Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni Solan, Himachal Pradesh. The study reveals that Diaeretiella rapae parasitized all nymphal instars of B. brassicae with a preference for the third instar (42%) followed by the fourth instar (30%), second instar (24%), and first instar (13%). The mean period of parasitoid from egg to host mummification and mummification to adult emergence was 9.04 and 3.5 days on the third instar and 10.55 and 5 days on the fourth instar, respectively. The total time period from egg to adult emergence was 12.45 and 15.55 days with the third and fourth nymphal instars of the host, B. brassicae, respectively. The fecundity, pre-oviposition, and oviposition period of the parasitoid were 53.2 eggs/female, 1.0 day and 7.1 days on the third instar, and 45.7 eggs/female, 1.0 days and 6.4 days on the fourth instar, respectively. The gross reproductive rate (GRR), net reproductive rate (R0), true intrinsic rate of increase (rm), finite rate of increase (λ), mean generation time (T) and doubling time (DT) of third instar was 42.47 female progeny/female, 26.60 female progeny/female, 0.1943 females/female/day, 1.21 females/day, 16.89 days and 3.57 days, respectively and 28.65 female progeny/female, 22.85 female progeny/female, 0.1594 females/female/day, 1.17 females/day, 19.43 days and 4.30 days for the fourth instar, respectively. The age-stage survival rate (sxj), age-stage life expectancy (exj) and age-stage reproductive values (vxj) of D. rapae on the third instar of B. brassicae were 13- 15 d, 0.5 for males and 14 d, 0.51 for females, 19.75 days for eggs at age zero and 12.76 days for pupa at age seven, 31.59 d-1 on 13 d, respectively and 16- 20 d, 0.45 for male and 17-18 d, 0.5 for female, 22.65 days for eggs at age zero and 13.65 days for pupa at age nine, 31.49 d-1 on 16 d for the fourth instar, respectively. The present study revealed that the third instar nymphs of B. brassicae were most preferred by D. rapae for development. Therefore, the parasitoid, D. rapae can be utilized as one of the components in the integrated pest management programme of cabbage aphid (B. brassicae).

Keywords: Biology; Cabbage Aphid; Demographic Parameters; Fertility; Parasitoid


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Citation: Tanuja Banshtu., et al. “Biology and Demographic Parameters of Diaeretiella Rapae (McIntosh) against Brevicoryne Brassicae (L.)". Acta Scientific Agriculture 6.11 (2022): 03-13.


Copyright: © 2022 Tanuja Banshtu., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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