Effect of staggered sowing on shoot fly, Atherigona soccata Rondani (Muscidae: Diptera) and stem borer, Chilo partellus Swinhoe (Crambidae: Lepidoptera) in parching sorghum genotype

RACHANA JAKATI; S.S. KARABHANTANAL; H.T. PRAKASH; S. B. PATIL

RACHANA JAKATI Department of Agril. Entomology, College of Agriculture, Vijayapura- 586 101 University of Agricultural Sciences, Dharwad - 580 005, India
S.S. KARABHANTANAL Department of Agril. Entomology, College of Agriculture, Vijayapura- 586 101 University of Agricultural Sciences, Dharwad - 580 005, India
H.T. PRAKASH Department of Agril. Entomology, College of Agriculture, Vijayapura- 586 101 University of Agricultural Sciences, Dharwad - 580 005, India
S. B. PATIL Department of Agronomy, College of Agriculture, Vijayapura- 586 101 University of Agricultural Sciences, Dharwad - 580 005, India

Keywords: Shoot fly, Stem borer

Abstract

Parching/Hurda sorghum is one of the special sorghum varieties. This special variety of sorghum grains are suitable for making good quality hurda and well fit it into commercial utility. Field experiment was carried out at the Regional Agricultural Research Station, Vijayapura, to study the effect of staggered sowing on shoot fly and stem borer in SMJ-1 hurda sorghum genotype. The present study revealed that, among different sowing dates, hurda genotype (SMJ-1) sown on 1st fortnight (FN) of September had highest number of shoot fly eggs (3.80/plant) and dead heart (70.47%). With late sowing in 1st fortnight of November the shoot fly incidence was declined by recording lowest number of eggs (0.37/ plant) and dead heart (17.44%). The stem borer dead heart percentage is relatively consistent ranging from 1.51 to 2.14 per cent. The correlation studies indicated that, dead heart per cent due to shoot fly and stem borer revealed a significant negative correlation with plant height, grain and stover yield. Plant growth and yield parameters recorded optimal yields during 2nd fortnight of September and 1st fortnight of October with minimum pest damage.