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- Title
Impact of different modules on spiders in rice (oryza sativa L.) ecosystem.
- Authors
Rajadurai, G.; Kumar, K.
- Abstract
The impact of different modules against the population of spiders in rice (Oryza sativa L.) ecosystem was studied during 2012 - 13. Two supervised field experiments were conducted during kharif 2012 and rabi 2012 - 13. Totally five modules namely chemical module, bio intensive module, neem based module, integrated module and farmers practice module with four replications was evaluated in the two seasons. In this experiment nine species of spiders viz., Araneus spp. C., Argiope catenulata D., Argiope pulchella T., Callitrichia formosana Oi., Clubiona japonicola Bosenberg & Strand, Leucage decorata W., Lycosa spp., Oxyopes javanus T. and Tetragnatha javana T. were identified during the crop growth period. The population of spiders was observed from 14 days after transplanting (DAT) to 77 DAT in both the seasons. During kharif 2012 the population of spiders ranged from 0.05 to 0.45/hill. The overall mean population of spiders ranged from 0.14 to 0.25/hill irrespective of the treatments. It was found that the per cent reduction was higher in the chemical module (44%) compared to the farmers practice module. During rabi 2012 - 13 the population of spiders ranged from 0.15 to 1.92/hill. The overall mean population of spiders ranged from 0.33 to 1.18/hill. A higher per cent reduction was observed in the chemical module (72.03%) as in the kharif. It was concluded that from both the field experiments a higher population of spiders was observed in the farmers practice module followed by integrated module, neem based module, bio intensive module and chemical module.
- Subjects
SPIDER populations; RICE diseases &; pests treatment; BIOPESTICIDES
- Publication
Journal of Biopesticides, 2014, Vol 7, p10
- ISSN
0974-391X
- Publication type
Article