SURVEY ON THE INCIDENCE OF SESAMIA INFERENS (WALKER) IN MAIZE IN GUNTUR AND KRISHNA DISTRICTS OF ANDHRA PRADESH
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Authors
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K. ANIL KUMAR*, T. MADHUMATHI, D.V. SAI RAM KUMAR, N. RAJ KUMAR and SK. NAFEEZ UMAR
Department of Entomology, Agricultural College, Acharya N.G. Ranga Agricultural University, Bapatla- 522 101
Keywords:
Sesamia inferens, Maize, Survey, Incidence, Guntur and Krishna districtsAbstract
The cumulative results of roving survey was conducted during (rabi 2017-18 and 2018-19) in
maize growing mandals of Guntur and Krishna districts for recording Sesamia inferens infestation in
farmer fields.The results showed that Narasaraopet mandal recorded the least infestation by S.
inferens in terms of percentage leaf infestation (18.28), dead heart percentage (15.16), stem tunneling
length (2.66 cm) and found less no. of larvae (0.39 plant-1), no. of pupae (0.22 plant-1) and Battiprolu
mandal recorded the least number of exit holes (0.48 plant-1). While, Ponnur mandal recorded the
highest percent leaf infestation (28.05) with stem tunneling length (5.71 cm).In Krishna district,
Veerullapadu mandal recorded the least infestation of maize by S. inferens in terms of percent leaf
infestation (15.33), dead heart percentage (12.97), stem tunneling length (2.10 cm) and found less
no. of larvae (0.24 plant-1), no. of pupae (0.18plant-1) and no. of exit holes (0.17 plant-1). Highest
percentage leaf infestation (24.28) and dead heart percentage (21.26) was recorded from Mylavaram
mandal;highest tunnel length (3.81 cm) from Musunnuru mandal. In case of Guntur district, highest
number of spiders were recorded in Battiprolu (2.42) and least in Narasaraopet (1.39), while highest
number of coccinellids were recorded in Ponnuru (4.74) and least in Battiprolu (3.54) mandals.
Furthermore, more number of spiders (2.69) were recorded in Mylavaram mandal, more number of
coccinellids (7.12) in Musunnuru mandal, and least number of spiders (1.18) and least number of
coccinellids (2.58) in Veerullapadu mandal of Krishna district.
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