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Mohanraj, P.
- Effect of Biorationals against the Thrips, Scirtothrips dorsalis Hood Infesting Chilli
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Authors
Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Krishi Vigyan Kendra, Pechiparai (T.N.), IN
3 Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Krishi Vigyan Kendra, Pechiparai (T.N.), IN
3 Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
Source
International Journal of Plant Protection, Vol 9, No 1 (2016), Pagination: 158-161Abstract
The present investigation was carried out to test the efficacy of biorationals against thrips, Scirtothrips dorsalis Hood on chilli. Field experiments were conducted at farmers holding during September 2009 - Febrauary 2010 and November 2009 - April 2010. Among biorationals tested, spinosad 45 SC @ 0.4ml 1-1 and emamectin benzoate 5 SG @ 0.4g 1-1 was found to be superior to the standard check dimethoate 30 EC @ 2ml 1-1 registering the least population of 0.55 and 0.59 / leaf, followed by Beauveria bassiana @ 1 x 108 spores ml-1 and neem oil 3 per cent which recorded thrips population of 1.01 and 1.11 / leaf. With regard to leaf curl damage by thrips, spinosad 45 SC @ 0.4 ml 1-1 and emamectin benzoate 5 SG @ 0.4g 1-1was very effective. Highest dry chilli yield of 1509 kg ha-1 was registered in spinosad 45 SC @ 0.4ml 1-1, which was on par with emamectin benzoate 5 SG @ 0.4g 1-1 (1525 kg ha-1) with respective additional income of Rs. 30,300 and Rs. 26,400. The highest cost benefit ratio (1:4.30) was obtained in spinosad 45 SC @ 0.4ml 1-1 followed by 1:4.30 in emamectin 5 SG @ 0.4g 1-1.Keywords
Biorationals, Thrips, LCI, Yield, Chilli.- Silkworm Disease Diagnosis through Molecular Approach and their Management
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Authors
Affiliations
1 State Department of Horticulture, Kanchipuram (T.N.), IN
2 Directorate of Extension Education, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
3 Department of Sericulture, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
4 Department of Entomology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
1 State Department of Horticulture, Kanchipuram (T.N.), IN
2 Directorate of Extension Education, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
3 Department of Sericulture, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
4 Department of Entomology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN