Vol. 10, Issue 5 (2021)

Author(s):
Rashmika A Kumbhar, Vijay M Shinde and Uday A Pawar

Abstract:
The present investigation was conducted at All India Co-ordinated Research Project on fruit crops, Department of Horticulture, Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra State during 2018 and 2019 on acid lime. The data revealed that during 2018-2019, maximum larval population (14.26 larvae per twigs) along with the highest leaf infestation (42.36 %) were recorded in the second week of July, 2018 (28th SMW). The lowest larval population (0.01 larvae per twigs) along with the lowest leaf infestation (1.84 %) were noticed in the third week of March, 2018 (12th SMW). During the successive year (2019-2020), maximum larval population (14.19 larvae per twigs) along with the highest leaf infestation (46.13 %) were recorded in the first week of August, 2019 (31th SMW). The lowest larval population (0.01 larvae per twigs) along with the lowest leaf infestation (1.24 %) were noticed in the last week of May, 2019 (22th SMW). The data on correlation of the larval population and per cent leaf infestation with the abiotic factors revealed that amongst nine factors, six factors viz., minimum temperature, morning relative humidity, evening relative humidity, Bright sunshine, wind velocity and rainfall were found positively correlated; remaining three factors viz. with maximum temperature, number of rainy days and evaporation were found negatively correlated. More or less negligible pest incidence was found during summer months.