Seasonal incidence of fruit borers (Conogethes punctiferalis and Deudorix isocrates) in guava cv. Taiwan white

Abstract

A number of insect pests are known to infest fruits of guava in India. The most important pest is fruitflies (Bactrocera dorsalis, B. zonata and B. correcta) followed by the next report of the fruit borers (Conogethes punctiferalis and Deudorix isocrates). However, the experiment was conducted on seasonal incidence of fruit borers on guava cv. Taiwan white at the College of Horticulture and farmer’s orchard, Venkataramannagudem-West Godavari during 2019-2020. The peak larval population of guava fruit borer Conogethes punctiferalis (4.50 larvae/tree) and its fruit infestation (32.79%) was found in 9th Standard Mean Week of 2020. The highest incidence and infestation of Deudorix isocrates was recorded in 5th Standard Mean Week of 2020 (4.25 larvae/tree and 30.80 per cent fruit infestation). The maximum and minimum temperature was negatively correlated and relative humidity is having positively correlation with the incidence of fruit borers whereas, rainfall was negatively correlated with the incidence of Conogethes punctiferalis and positively correlated with incidence of Deudorix isocrates.