Role of Stephanitis typicus Distant in the spread of coconut root (wilt) pathogen
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1972-05
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Abstract
Banana lace-wing bug (Stephanitis typicus Distant) transmitted the pathogen associated with the root (wilt) disease of coconut. Preliminary studies on the vector-pathogen relationship, with cowpea (Vtgna sinensis (L.) Savi ex Hassk) as an indicator host, revealed that effective transmission was accomplished by groups of 10 bugs. They needed acquisition feeding- of 2 hr and transmission feeding of 16 hr. The infectiyity was lost after 24 hr. Affected palms in die age group of 25-35 years, which were in the middle stage of disease and had flaccidity alone as the symptom, were the most efficient sources of inoculum. At least 16 per cent of the field population of the bugs actively transmitted the disease.
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Indian J. agric. Sci.42(5):414-417,May 1972