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Sebastian, P. A.
- Vertical Stratification of Spiders in Kuttanad Rice Agroecosystem, Kerala
Abstract Views :310 |
PDF Views:158
Authors
Affiliations
1 Division of Arachnology, Sacred Heart College, Thevara, Cochin, Kerala, 682013, IN
2 Christ College, Iringalakkuda, Thrissur, Kerala, 680125, India, IN
1 Division of Arachnology, Sacred Heart College, Thevara, Cochin, Kerala, 682013, IN
2 Christ College, Iringalakkuda, Thrissur, Kerala, 680125, India, IN
Source
Journal of Biological Control, Vol 28, No 2 (2014), Pagination: 62-67Abstract
Investigations were carried out during the period from July 2010 to January 2011 on the vertical stratification of spiders in the rice agroecosystem of Kuttanad, Kerala. For the present study, five main functional groups were recognized based on the activity and foraging behaviour related to average height of the rice plant, namely <20cm from water/soil surface, 20-40cm, 40-60cm, 60-80cm and >80cm. The final growth stage of each plant was thoroughly examined from top to bottom, on leaf blades, flowers, dry leaves and ground stratum. Spiders were then identified with the help of available literature. A total of 1632 individuals from 69 species, 49 genera and 17 families were collected during the study period. The most species rich family was Salticidae (15 species) followed by Tetragnathidae (12 species) and Araneidae (7 species). The spiders collected were classified into 7 ecological guilds based on the foraging mode of the spiders. Among the 69 species of spiders collected, 54% belongs to stalkers (28%) and orb weavers (26%) categories. The second dominant guilds are the ground runners (13%) and space web builders (11%). Ambushers (10%), foliage runners (7%), sheet web builders (5%) and sheet web builders are the other ecological guilds to which these spiders belong.Keywords
Araneae, Rice, Stratification, Guild, Microhabitat, Spiders.Full Text
References
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- Biocontrol Potential of Oxyopes chittrae Tikader (Araneae: Oxyopidae) on Three Lepidopteran Pests of Cotton
Abstract Views :245 |
PDF Views:131
Authors
Affiliations
1 Division of Arachnology, Department of Zoology, Sacred Heart College, Thevara, Kochi, Kerala-682013, IN
1 Division of Arachnology, Department of Zoology, Sacred Heart College, Thevara, Kochi, Kerala-682013, IN
Source
Journal of Biological Control, Vol 18, No 1 (2004), Pagination: 77-80Abstract
Biocontrol potential of Oxyopes chittrae Tikader (Araneae: Oxyopidae) on three lepidopteran pests of cotton was studied in the laboratory during the years 1999-2001. Early instars of insect pests were only taken to assess the feeding potential. The rate of predation was found "'arying among the life stages and sexes. Adult females consumed more prey than any other stage. It consumed an average of 19.08±11.01, 4.61±1.03 and 4.08±O.9 numbers of bollworms, borers, and loopers_ The different life stages of Oxyopes chittrae showed a high degree of variation in feeding potential and maximum variation was with bollworm and minilllunl with looper. The prey preference was in the order bollworm> borer> looper.Keywords
Biocontrol, Cotton, Lepidopteran Pest, Oxyopes chittrae.Full Text