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Occurrence of the red spider, Oligonychus coffeae (Nietner), on tea in north-east India in relation to pruning and defoliation.

Published online by Cambridge University Press:  10 July 2009

G. M. Das
Affiliation:
Senior Entomologist, Tocklai Experimental Station, Cinnamara, Assam.

Extract

The red spider, Oligonychus coffeae (Niet.), persists in all stages of its development on a few old leaves and ‘ janams ’ (small leaves at the base of the shoot) of tea bushes during the cold weather, and this persisting population is primarily responsible for the attack in the spring.

In pruning, a great many of the old leaves (including janams) are removed from bushes, and, concomitantly, the red spider. Pruned tea is, therefore, less attacked than unpruned tea or ‘ skiffed ’ tea (where just a little is cut off the tops of the shoots) in which comparatively more leaves are left on bushes.

Type
Research Paper
Copyright
Copyright © Cambridge University Press 1960

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References

Andrews, E. A. (1928). Red spider.—Quart. J. Indian Tea Ass. 1928 pp. 206219.Google Scholar
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Das, G. M. (1959b). Bionomics of the tea red spider mite, Oligonychus coffeae (Nietner).—Bull. ent. Res. 50 pp. 265274.CrossRefGoogle Scholar
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Woodford, E. K. (1947). Factors effecting the distribution and intensity of the attack of red spider (Tetranychus bioculatus W.M.) at Borbhetta in the spring of 1947.—Rep. Indian Tea Ass. Sci. Dep. 1947 appdx. 1Google Scholar
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Occurrence of the red spider, Oligonychus coffeae (Nietner), on tea in north-east India in relation to pruning and defoliation.
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