Field resistance in mango varieties against shoot gall
1999
Singh, Gajendra(G.B. Pant University of Agriculture and Technology, Pantnagar (India))
Shoot gall caused by Apsylla cistellata Buckton is one of the most severe mango malady in Nepal, Bangladesh, northern India and Pakistan. The only effective control measure against it is insecticidal application before gall formation in the rainy months of August-September. Therefore attempts were made for two years (1994-95 and 1995-96) to screen out 110 varieties of mango against shoot gall formation, percent twig affected and ovipositional preference by the female A. cistellata. Twenty varieties viz : Annanas, Azwain, Baramalda, Chinnaswarnarekha, Delicious, Gulabkhas, K.O. 7, K.O. 11, Makaram, Maharaja of Mysore, Mohamaddi, Mundappa, Nowneetum, NX Panchadharakalsa, Panchadharakalsa, Police, Sonnakullu, Salem Banglora and Vellakachi had zero gall formation in both years. Thus they escaped from the attack and egg laying. These varieties seem to have field resistance against A. cistellata. Some 68 varieties were susceptible (less than 100 galls/10 twigs). While 22 were highly susceptible (more than 100 galls/10 twigs).
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