Study on the Incidence of Sucking Pests and Pink Bollworm in Cotton
N. Rajasekhar *
Dr. K. L. Rao Krishi Vigyan Kendra, Garikapadu - 521175, Andra Pradesh, India.
P. Venkata Subbaiah
Dr. K. L. Rao Krishi Vigyan Kendra, Garikapadu - 521175, Andra Pradesh, India.
P. N. Siva Prasad
Dr. K. L. Rao Krishi Vigyan Kendra, Garikapadu - 521175, Andra Pradesh, India.
M. Raja Narasimha
Dr. K. L. Rao Krishi Vigyan Kendra, Garikapadu - 521175, Andra Pradesh, India.
I. Venkata Reddy
Dr. K. L. Rao Krishi Vigyan Kendra, Garikapadu - 521175, Andra Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
Sucking pests and pink bollworm are serious pest of cotton one after the other in India by causing serious yield losess. The present investigation was carried out in three major cotton growing mandals of NTR district to understand the level of pest incidence in Bt cotton during Kharif, 2022-23 on regular interval. Among the sucking pests only thrips population recorded 32.26 no/3 leaves and crossed the ETL at 45 DAS. Remaining sucking pests such as Leafhopper, whitefly and aphid did not crossed ETL during crop growth period and highest incidence of 5.92, 4.04 and 27.14 no/3 leaves was recorded respectively at 45, 60 and 120 DAS. Whereas pink bollworm recorded 23.10% rosette flowers, 44.04% boll damage in Bheemavaram village of Vastavai mandal and 40.83% locule damage in Konakanchi village of Penuganchiprolu mandal.
Keywords: Sucking pest, pink boll worm, rosette flowers, boll damage and locule damage