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Reddy, R. V. S. K.
- Genetic Divergence in Dolichos Bean (dolichos Lablab l. Var. Typicus) Genotypes for Yield and Yield Contributing Traits
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Authors
Affiliations
1 College of Horticulture, Dr. Y.S.R. Horticultural University, Rajendranagar, Hyderabad (A.P.), IN
2 Vegetable Research Station, Dr. Y.S.R. Horticultural University, Rajendranagar, Hydearabad A.P., IN
3 National Bureau of Plant Genetic Resource Regional Station, Hydearabad A.P.
4 College of Agriculture, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hydearabad A.P., IN
1 College of Horticulture, Dr. Y.S.R. Horticultural University, Rajendranagar, Hyderabad (A.P.), IN
2 Vegetable Research Station, Dr. Y.S.R. Horticultural University, Rajendranagar, Hydearabad A.P., IN
3 National Bureau of Plant Genetic Resource Regional Station, Hydearabad A.P.
4 College of Agriculture, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hydearabad A.P., IN
Source
The Asian Journal of Horticulture, Vol 8, No 2 (2013), Pagination: 733-736Abstract
Mahalanobis D2 statistics was used to study the genetic divergence for 19 characters among 48 genotypes of Indian bean. Genotypes were grouped in to eight clusters on the basis of relative magnitude of D2 values. The highest number of genotypes (14) appeared in cluster III. The maximum inter cluster distance was observed between cluster IV and cluster VI followed by cluster IV and VIII. The minimum inter cluster distance was observed between cluster I and cluster IV. Maximum intra cluster distance was in cluster V followed by cluster III. The mean value for most of the traits was highest in cluster VIII. Among the yield contributing characters, the maximum contribution towards divergence was made by protein content followed by number of flowers per inflorescence, pod length and number of pods per plant. Hybridization between cluster IV and VI could be utilized for getting the superior recombinants or transgress segregants in segregating generations.Keywords
Dolichos Bean, Genetic Diversity, Hybridization
- Dissipation Studies of Chlorantraniliprole on Capsicum in Field and Poly House Conditions for Food Safety
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Authors
Affiliations
1 Department of Entomology, Horticultural Polytechnic, Dr. Y.S.R. Horticultural University, Nuzvid, Krishna (A.P.), IN
2 Indian Council of Agricultural Research., Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
3 Department of Entomology, AINP on Pesticide Residues, Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
4 Department of Extension, Dr. Y.S.R. Horticultural University, Nuzvid, Krishna (A.P.), IN
5 Department of Plant Pathology, Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
1 Department of Entomology, Horticultural Polytechnic, Dr. Y.S.R. Horticultural University, Nuzvid, Krishna (A.P.), IN
2 Indian Council of Agricultural Research., Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
3 Department of Entomology, AINP on Pesticide Residues, Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
4 Department of Extension, Dr. Y.S.R. Horticultural University, Nuzvid, Krishna (A.P.), IN
5 Department of Plant Pathology, Prof. Jayshankar Telangana State Agricultural University, Rajendranagar, Hyderabad (Telangana), IN
Source
The Asian Journal of Horticulture, Vol 12, No 1 (2017), Pagination: 22-27Abstract
Chlorantraniliprole is a broad spectrum foliar insecticide with contact and systemic action, widely used on vegetables in India for the management of lepidopteran insects both in field and poly houses. Chlorantraniliprole is not registered for use on capsicum in India and hence, maximum residue limits are not available as per Food Safety and Standards Authority of India. However, use of chlorantraniliprole in open field and poly house is very common hence, chlorantraniliprole residues are found in survey samples. A research project was taken to study dissipation pattern of chlorantraniliprole 20 SC in both open fields and poly houses, when applied thrice @ 60 g a.i.ha-1, first spray at fruit initiation followed by second and third spray at 10 days interval as per the farmers practice. Chlorantraniliprole residues were quantified through regular sampling till the residues are below determination level (BDL) of 0.05 mg kg-1 following the validated QuEChERS method. The qualitative and quantitative analysis of chlorantraniliprole was performed on LC-MS/MS (PDA). Initial deposits of 0.36 mg kg-1 were detected in capsicum samples collected from open filed, which dissipated to BDL in 7.0 days while in poly house, initial deposits of 1.31 mg kg-1 were dissipated to BDL in 15.0 days. The waiting period for safe harvest was worked out to be 7.0 and 15.0 days when chlorantraniliprole 20 SC @ 60 ml a.i. ha-1 sprayed thrice in open and poly house conditions, respectively. Dissipation is slow in poly house compared to open fields due to various factors. In both situations initial deposits are lower than the MRL (2 mg kg-1) of Codex Alimentarius Commission hence, a pre-harvest interval of 7.0 and 15.0 day is recommended.Keywords
Chlorantraniliprole, Capsicum, Field, Poly House, Food Safety.References
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