Asian Journal of Bio Science

S. T. Aghav ¹, H. S. Baheti ¹, A. B. Tambe ¹

Affiliations
1 Department of Entomology, Oilseeds Research Station, Mahatma Phule Krishi Vidyapeeth, Jalgaon (M.S.), IN

Abstract

Six insecticides viz; thiamethoxam, imidacloprid, acetamiprid, profenofos 40 per cent+cypermethrin 4 per cent, endosulfan @ 0.07 per cent and carbofuran with various concentrations were evaluated against shoot fly of Sorghum (Sorghum bicolor L Monech) The shoot fly oviposition, plants with eggs and dead hearts were ranged from 0.95 to 2.88 eggs plant^-1, 32.57 to 59.12% and 6.34 to 29.14%, respectively in various treatments as against to 1.78 eggs plant^-1, 35.76% and 48.96%, respectively in untreated control. Maximum grain and fodder yields were obtained from imidacloprid @ 1.2 per cent ST treated plots i.e. 27.59 and 91.67 q ha^-1, respectively and closely followed by thiamethoxam @ 0.75 per cent ST i.e. 27.50 and 81.92 q ha^-1, respectively.

Keywords

Sorghum, Shoot Fly, Chemical Control, Imidachloprid, Acetamaprid, Thiamethoxam.

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U. V. Ingawale ¹, A. B. Tambe ¹

Affiliations
1 Department of Entomology, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN

Abstract

Studies on seasonal abundance of aphids and their natural enemies in relation to the climatic factors were undertaken on lucerne crop during 2002-03. Average number of lucerne aphids and predators per tiller showed increasing trend from September 2002 with its maximum level at the middle of January 2003. Thereafter, decreasing trend was noticed. The aphid population was negatively correlated with maximum and minimum temperature and positively correlated with lady bird beetles andChrysopa larval population. The abundance of lady bird beetles and Chrysopa larval population was found at its maximum level during January, 2003, then after it started declining.

Keywords

Lucerne, Aphids, Predators, Lady Bird Beetles, Chrysopa.

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S. T. Aghav ¹, A. B. Tambe ¹, H. S. Baheti ¹, A. J. Patil ¹

Affiliations
1 Department of Entomology, Oilseeds Research Station, Mahatma Phule Krishi Vidyapeeth, Jalgaon (M.S.), IN

Abstract

A field experiment was conducted during rabi cropping season of 2001-02 to characterize relationship of various meteorological parameters with sorghum shoot fly incidence. The serial sowing technique was used starting from 36th meteorological week to 44th meteorological week. Maximum per cent dead hearts on 14 days after emergence were recorded during 36th meteorological week (45%) when prevailing maximum, minimum temperature and morning and evening relative humidity were 33.1oC,22.1oC, 77.5 and 58.5%, respectively. Maximum per cent dead hearts on 28 days after emergence were recorded during 36th meteorological week (78.8%) when prevailing maximum, minimum temperature and morning and evening relative humidity were 32.7oC,22.1oC, 78.7 and 54.7%, respectively. The shoot fly incidence in the form of dead hearts was correlated with the meteorological parameters corresponding to the period of observations. The population dynamics showed significant positive correlation with meteorological parameters studied while dead hearts formation was not correlated.

Keywords

Shoot Fly, Atherigona soccata, Sorghum.

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