Vol. 6, Issue 6S (2017)
Insect pest succession on hybrid maize and management of pink stem borer, Sesamia inferens Walker
Author(s): Yogesh Kumar Sidar, Akash Nirmal, Rupesh Kumar Gajbhiye, Manmohan Singh Bisen and Pankaj Bhargav
Abstract: The present investigation entitled “Insect pest succession on hybrid maize and management of pink stem borer, Sesamia inferens Walker” was conducted during Kharif 2014-15 at the Research cum Instructional Farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.). Regarding the insect pests succession on hybrid maize crop and their natural enemies, five insect species viz., pink stem borer (Sesamia inferens), green stink bug (Nezara virudula), maize leaf hopper (Cicadulina spp.), maize black aphid (Rhopalosiphum maidis) and maize cob borer (Helicoverpa armigera) were observed as the major insects pests on maize. While, rove beetle, lady bird beetle and spider observed as major natural enemies against insects of maize. In the evaluation of the bioefficacy of granular insecticide molecules against pink stem borer, it was found that the minimum leaf injury rating was recorded with carbofuran (3.00) which was at par with flubendamide (3.23) followed by thiamethoxam (3.43), emamectin benzoate (3.57), rynaxypyr (4.03) and cartap hydrochloride (4.17) treated plots. The highest leaf injury mean was recorded 4.20 with fipronil. The minimum per cent of dead heart damage was recorded with carbofuran 36.67% which was at par with flubendamide 43.33% followed by rynaxypyr 45.50%, thiamethoxam 46.67%, emamectin benzoate 50.0%, and cartap hydrochloride 56.67% treated plots. The highest per cent dead heart damage was recorded with fipronil 60.0%. The grain yield was also significantly highly influenced by carbofuron 3 G followed by flubendamide 20 WG, thiamethoxam 25 WG, emamectin benzoate 5 SG and cartap hydrochloride 4 G, rynaxypyr 0.4% G and fipronil 0.3% G. In the study of the relative performance of popular maize hybrids against pink stem borer it was observed that the genotype HISHELL gave maximum grain yield whereas genotypes IAHM-2013-26 and IAHM-2013-09 showed maximum number of pinholes, leaf injury rating, dead heart per cent, stem tunneling and stem exit hole.