Field resistance in mango varieties against shoot gall.
Gajendra Singh
Author Affiliation: G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India.
Acta Horticulturae : 759-763
Abstract : Shoot gall caused by Apsylla cistellata Buckton is one the most severe mango problems in Nepal, Bangladesh, Northern India and Pakistan. The only effective control measure against this insect is the use 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 113 varieties of mango against shoot gall formation, percentage of twigs affected and ovipositional preference by females of A. cistellata. Twenty varieties (Annanas, Awain, Baramalda, Chinnaswaranrekaha, Delicious, Gulabkhas, K.O.7, K.O.-11, Makaram, Maharaja of Mysore, Mohamddi, Mundappa, Nowneetum, N×Panchadharakalsa, Panchadhara Kalsa, Police, Sonakullu, Salem Banglora and Vellakachi) had zero gall formation in both years. These varieties seem to have field resistance against A. cistellata. Another 68 varieties observed were found susceptible (less than 100 galls/10 twigs), while 22 were highly susceptible (more than 100 galls/10 twigs).