ISSN : 2663-2187

Natural hymenopteran parasitoids of pod fly, Melanagromyza obtusa (Malloch) (Diptera: Agromyzidae) on pigeonpea UPAS 120 in relation to weather parameters

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Manoj Kumar Singh*,Sunil Kumar Dwivedi, Monali Upadhyay, Ridhima Dhiman, Ananya Sharma, Smriti Kumari, Jadhav Abhishek Ashok
ยป doi: 10.33472/AFJBS.6.5.2024.1056-1069

Abstract

The current study shows presence of two major hymenopteran parasitoids viz., Euderus lividus (Ashmead) and Ormyrus orientalis (Walker) on the pigeonpea major pest, Melanagromyza obtusa (Malloch). Pigeon pea pod fly infestation has been prevalent during the Kharif crop seasons of 2022-23 and 23-24, persisting until harvest. First appearance of pod fly larvae and pupa was observed in the 41stand39thstandard meteorological week (SMW). The larval population peak at 52.00 and 41.00 larvae per 100 pods was noticed in the 44th SMW at both years, while pupal population peak at 49.00 and 40.00 pupae per 100 pods showed during the 50th and 45th SMW. The parasitism level of E. lividus declined from 31.82 to 10.53%and 29.72 to 7.14% from 46thupto 52nd and 45th upto 50thSMW. The highest percentages of pupal parasitism O. orientalis recorded 25.64 and 24.32% in 47th and 44th SMW.While low percentage of pupal parasitism was noted 3.22 and 3.84% in 1st and 51st SMW at both years. Simple correlation between weather parameters with pod fly larvae and pupae showed that the larval population exhibited a significant positive relation with maximum temperature (r=0.646*) and (r=0.746**) at both years.The natural enemies of pod fly larvae and pupae by E. lividus and O. orientalis would improve knowledge on biological control of the pest population.

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