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Journal of Entomology and Zoology Studies
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P-ISSN: 2349-6800, E-ISSN: 2320-7078

Journal of Entomology and Zoology Studies

2018, Vol. 6, Issue 3
Spatial distribution of green peach aphid, Myzus persicae Sulzer and its parasitoid, Aphelinus asychis Walker in bell pepper under polyhouse conditions

SC Verma, PL Sharma, RS Chandel and Sarswati Negi

Investigations were carried out during October 2017- March 2018 at the Experimental Farm of the Department of Entomology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh, India in order to study the spatial distribution of Myzus persicae and its parasitoid, Aphelinus asychis Walker in bell pepper under poly house conditions. One month old bell pepper seedlings cultivar California wonder were planted in the field in the month of October, 2017. In the present study variance to mean ratio (σ2/X), mean crowding (X*), ratio of mean crowding to mean (X*/X), ‘k’ of negative binomial, Taylor’s Power equation (σ2=5.2646X1.335 for aphid and σ2 = 2.7871 X1.277 for parasitoid), Iwao’s patchiness regression and optimum number of samples (Nopt) required to achieve the desired precision were calculated for different densities. Green peach aphid, M. persicae appeared in the 47th standard week (57.47aphids/ plant and 0.65 parasitoids / plant during 2017) and persisted upto 4th standard week (2.79 aphids/ plant and 0.15parasitoids / plant during 2018 is ongoing) and followed a negative binomial distribution. Optimum number of samples (Nopt) required varied with mean density as well as precision level. The present study will be useful for developing a sampling plan of M. persicae and its parasitoids, A. asychis in bell pepper for its monitoring and management.
Pages : 776-780 | 789 Views | 142 Downloads


Journal of Entomology and Zoology Studies Journal of Entomology and Zoology Studies
How to cite this article:
SC Verma, PL Sharma, RS Chandel, Sarswati Negi. Spatial distribution of green peach aphid, Myzus persicae Sulzer and its parasitoid, Aphelinus asychis Walker in bell pepper under polyhouse conditions. J Entomol Zool Stud 2018;6(3):776-780.

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