International Journal of Plant Protection

D. R. Patel ¹, M. S. Purohit ²

Affiliations
1 College of Agriculture, Navsari Agricultural University, Bharuch Gujarat
2 College of Agriculture, Navsari Agricultural University, Bharuch Gujarat, IN

Abstract

The incidence of Mythimna separata on Rabi sorghum was noticed from fourth week of November and remained up to second week of January, ranged between 0.04 to 0.15 larvae per plant. Maximum larval population was recorded during first week of December (0.15 larvae/plant). The correlation studies revealed that abiotic factor did not influence on army worm population on sorghum during Rabi season.

Keywords

Sorghum, Armyworm, Mythimna Sepatata, Correlation

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D. R. Patel ¹, M. S. Purohit ²

Affiliations
1 Polytechnic in Agriculture, (N.A.U.), Maktampur, Bharuch Gujarat, IN
2 Department of Entomology, N.M. College of Agriculture, Navasari Agricultural University, Navasari Gujarat, IN

Abstract

Field screening of 12 genotypes of sorghum against major insect pest during Rabi 2006-07 and 2007-08 showed that among 12 genotypes Nizergoti was found less susceptible to shoot fly, Among different plant characters, the length of leaves exhibited significant positive (r=0.272) and number of leaves was found to be significant and negative (r=-0.255) influence on incidence of shoot fly (r=-0.255).

Keywords

Sorghum, Shoot fly, Atherigona soccata, Genotypes, Physical plant characters, Susceptible

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D. R. Patel , M. S. Purohit ¹

Affiliations
1 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navasari Gujarat, IN

Abstract

Studies on population dynamics of Melanaphis sacchari infesting sorghum was made during 2007-08 and 2008-09 in Kharif season at Agricultural Research Station, N.A.U., Tanchha, district Bharuch. The incidence of pest began from fourth week of August and continued upto first week of November with a peak activity in first week of November. The abiotic factors, minimum and average temperature, morning, evening and average relative humidity, rainy days and wind velocity had significant negative association, while sunshine hours had significant positive association with Melanaphis sacchari on Kharif sorghum.

Keywords

Sorghum, Aphid,melanaphis Sacchari Correlation, Weather Parameters

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