EFFECTS OF SORGHUM, MAIZE AND BAJRA DIETS ON EMERGENCE OF RICE MOTH [CORCYRA CEPHALONICA (STAINTON)]
MAHAVIR MALIK* AND RAJESH KUMAR
Department of Entomology,
Chaudhary Charan Singh Haryana Agricultural University,
Hisar-125 004 (Haryana), India
*(e-mail : malikmahavirsingh@gmail.com)
(Received : 22 January 2019; Accepted : 22 March 2019)
SUMMARY
Twelve diets of grains were prepared in different combination of sorghum, maize and bajra to rear and maintain the rice moth, Corcyra cephalonica under laboratory conditions. The study revealed
that among all grains and their combination, evaluated, sorghum proved to be significantly better with 86.93 adult emergence upto 80 days after infesting the grains. In case of other than bajra+maize (2+1) and bajra diets 50% moth emergence was achieved within 70 days of infestation in most of diets. The peak emergence of moth was observed during 61-70 days after infesting the grains in case of sorghum, maize, sorghum + maize (2:1), maize + sorghum (2:1). The first and last moth emerged from sorghum, maize, ‘Bajra’, sorghum + Bajra (2:1) maize + sorghum (2:1) maize +Bajra (2:1), Bajra+ maize (2:1), sorghum + Bajra (2:1), Bajra+ sorghum (2:1), sorghum + maize (1:1), maize + Bajra (1:1) and sorghum + Bajra (1+1) was 30 and 141, 31 and 143, 40 and 150, 32 and 142, 32 and 142, 34 and 144 days after infesting the grains, respectively. The emergence of 50 and 80 per cent of moth from sorghum, maize,
sorghum + maize (2:1), maize + sorghum (2:1), maize + Bajra (2:1) was observed up to 70 and 80 days after infesting the grains, while, it was 90 and 110 days after infesting the grains of Bajra, Bajra + maize (2+1). More than 20% moths emerged from sorghum grains alone within 50 days of infestation. Whereas less than 1% moths emerged from bajra diet up to 40 days of infestation as compare to others.
Key words: Bajra, Corcyra cephalonica, grains, development, egg, emergence pattern, maize, rearing, sorghum