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Senthil, K.
- Gall Wasp Leptocybe invasa (Hymenoptera: Eulophidae) Management in Eucalypts
Abstract Views :251 |
PDF Views:140
Authors
J. Prasanth Jacob
1,
K. Senthil
1,
V. Sivakumar
1,
R. Seenivasan
2,
P. Chezhian
2,
N. Krishna Kumar
1
Affiliations
1 Institute of Forest Genetics and Tree Breeding, Coimbatore-641002, Tamil Nadu, IN
2 Tamilnadu News Print and Papers Limited, Kagathipuram, Karur, Tamil Nadu- 639136, IN
1 Institute of Forest Genetics and Tree Breeding, Coimbatore-641002, Tamil Nadu, IN
2 Tamilnadu News Print and Papers Limited, Kagathipuram, Karur, Tamil Nadu- 639136, IN
Source
Journal of Biological Control, Vol 29, No 1 (2015), Pagination: 20-24Abstract
The invasive gall wasp Leptocybe invasa (Hymenoptera: Eulophidae) induces galls on the shoots of Eucalyptus camaldulensis Dehnh. and E. tereticornis Sm. and damage nursery seedlings young plantations and coppice shoots. The magnitude of the damage in nurseries and young plantations necessitates increased efforts to reduce the incidence and impacts of the pest. Identification of feasible and appropriate management methods will help in reducing the high cost of containing the pest in outbreak situations and avoid loss of planting material by state Forest Departments, Corporations and farmers while raising commercial Eucalyptus plantations. Deployment of gall tolerant clones and biological control agents has been attempted in the present study. Results show that eucalyptus gall wasp in nurseries can be managed by deploying identified gall tolerant, productive clones. Release of natural enemies like Quadrastichus mendeli and Megastigmus sp and regular monitoring of its population level in nurseries can further bring down the gall infestation.Keywords
Invasive Species, Eucalyptus, Gall, Biological Control, Parasite, Resistance.Full Text
- Efficacy of Ethyl Acetate Extracts of Botanicals On Diamond Back Moth Plutella xylostella L.
Abstract Views :81 |
PDF Views:68
Authors
Affiliations
1 Department of Agricultural Entomology, Agricultural College & Research Institute (AC&RI), Tamil Nadu Agricultural University (TNAU), Madurai 625104, Tamil Nadu, IN
2 Department of Agricultural Entomology, TNAU, Coimbatore 641003, Tamil Nadu, IN
3 Department of Soils and Environment, AC&RI, TNAU, Madurai 625104, Tamil Nadu, IN
4 Department of Biotechnology, Centre of Innovation, AC&RI, TNAU, Madurai 625104, Tamil Nadu, IN
1 Department of Agricultural Entomology, Agricultural College & Research Institute (AC&RI), Tamil Nadu Agricultural University (TNAU), Madurai 625104, Tamil Nadu, IN
2 Department of Agricultural Entomology, TNAU, Coimbatore 641003, Tamil Nadu, IN
3 Department of Soils and Environment, AC&RI, TNAU, Madurai 625104, Tamil Nadu, IN
4 Department of Biotechnology, Centre of Innovation, AC&RI, TNAU, Madurai 625104, Tamil Nadu, IN
Source
Indian Journal of Entomology, Vol 84, No 3 (2022), Pagination: 659-662Abstract
In the present study, ethyl acetate extracts of six botanicals were extracted by continuous hot percolation process in Soxhlet apparatus and evaluated to study the antifeedant, insecticidal and the growth and development inhibitory activity on second instar larvae of diamond back moth Plutella xylostella L. The results showed that the Sesbania grandiflora at 5% exhibited maximum antifeedant index (34.27%) followed by Swietenia macrophylla 5% (28.91%). Extracts of these plants were also found to be the most effective against larvae giving 76.67 and 23.33% mortality, respectively. The adult emergence was 23.33 and 26.67%, respectively with these, while developmental period did not reveal any significant differences.Keywords
Plutella xylostellaSesbania grandiflora, Swietenia macrophylla, botanicals, soxhlet extraction, antifeedant, toxicity, growth inhibition, developmental periodFull Text
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