Preliminary study on cause of gall formation in mango by Apsylla cistellata Buckton (Hemiptera: Psyllidae).
Kuldeep Sharma, Khan M. A., Suneel Kumar
Author Affiliation: Biological Control Laboratory, Department of Entomology, College of Agriculture, G.B.P.U.A.&T., Pantnagar (U.S. Nagar) 263 145, India.
Entomon 33 : 213-215
Abstract : Gall formation associated with the incidence of Apsylla cistellata in mango is attributed to the chemical changes in the host caused by feeding of Apsylla nymphs. The oils of infected and healthy plant parts were extracted using Clevenger's apparatus and Uv-vis spectra of samples were recorded ranging 200-300 nm in THF over Genesis 10 Thermospectronic USA. It was seen that there was significant change in the chemical composition of oil in the infected shoot when compared to healthy shoots in September while no change was seen in the infected shoot in April. Thus physiological effect caused by the feeding of A. cistellata on the mango trees is indicated to be associated with gall formation.