Incidence of Sapota Seed Borer Trymalitis margarias Meyrick and its Management
DOI:
https://doi.org/10.55446/IJE.2023.1247Keywords:
Trymalitis margarias, sapota varieties, PKM-1, DSH-1 Kalipatti, fruit damage, T. margarias larvae, larval parasitoid, Bracon sp., insecticides, management, Mudigere, yield, cost economics,Abstract
A study on the incidence and management of sapota seed borer Trymalitis margarias Meyrick was conducted from 2019 to 2020 in Mudigere. The varietal screening experiment revealed that PKM-1 was the least susceptible variety with 4.58% fruit damage followed by DSH-1 (9.79%) while Kalipatti was found to be highly susceptible (18.76%). The highest parasitisation by the larval parasitoid, Bracon sp. was seen in Kalipatti i.e., 28.13% while the least was observed in PKM-1 (7.29%). Among the insecticides screened against T. margarias from two sprays, profenophos 50EC (0.13 larvae/ fruit and 9.72% fruit damage) and novaluron 10EC (0.19 larvae/ fruit and 13.43% fruit damage) performed very well over standard check deltamethrin 2.8EC (0.3 larvae/ fruit and 22.22% fruit damage) in minimizing the infestation. Further, the highest fruit yield and the cost-benefit ratios were documented in novaluron 10EC (7.37 t/ ha and 1: 2.96).
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