Biology and bionomics of Stephanitis typica (Distant)
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Date
2007-02-08
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Abstract
Direct and indirect evidence is available on Stephanitis typica (Distant) (Tingidae) transmitting Coconut Root (wilt) disease in Kerala, responsible for an annual loss in yield of 34 crores nuts. The lace bug, originally recorded from banana, is polyphagous. On coconut foliage, the bug completes its life cycle in about 25 days with an average incubation period of 12 days and a total nymphal period of 13 days covered under five instars. Both the imago and nymphs drain the contents of the mesophyll tissue. There are two peak periods of abundance in March-May and September-October. Fluctuations in populations are directly correlated to temperature and sunshine, inversely to relative humidity and rainfall. On individual palms, abundance increases from outer to the tender leaves. On each leaf, they occur in greater numbers in middle leaflefts. Diseased palms harbour more insects than the healthy. The insect is preyed upon by a mirid bug. The pest is easily controlled by praying carbaryl.
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Biology of lacebug vector of coconut root (wilt)
Citation
Proc.natl.Acad.Sci. 1980 v-46 i-6 p-832-836