INFLUENCE OF WEATHER FACTORS ON THE INCIDENCE OF LITCHI SHOOT AND FRUIT BORER, Conopomorpha cramerella Snellen (LEPIDOPTERA: GRACILLARIDAE) IN BIHAR
Litchi (Litchi Chinensis Sonn) is one of the important sub-tropical fruits, indigenous to southern China. It was introduced to India during the end of the 1711. century. India occupies second position in terms of area (60,000 ha) and production (4.33 lakh MT) after China, with the productivity of 7.2 metric tones (Kumar and Kumar, 2008). In India, Bihar offers the most salubrious climate to grow litchi and accounts for about 47 percent of the total area under litchi in the country. The total production of litchi in Bihar is 3.36 lakh tones with productivity of 12 tonnes per hectare. More than two third (74%) of its production in India comes from Bihar. Litchi suffers from the attack of the litchi shoot and fruit borer (Collopomorpha cramerclla Snell). The larvae damage the Iitchi leaves by mining the midribs and fruit by feeding on pulp. It starts its activity on litchi trees as leaf miner during August - February and from April to July as fruit borer (Hameed et al.. 1999). There has been no systematic work on its seasonal incidence on litchi in relation to weather conditions prevailing in Bihar. The present study was, therefore, undertaken to generate relevant information on these aspects, which will help in formulating integrated pest management strategies against this pest.
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