Effect of insecticides, fungicides and flower hormones on mango yield.
Azizur Rahman S. K. M., Gajendra Singh
Author Affiliation: Department of Entomology, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, Uttaranchal, India.
Indian Journal of Plant Protection 30 : 63-66
Abstract : Studies were conducted in 2001 in Pantnagar, Uttaranchal, India, with mango cv. Langra to determine the individual as well as combined effects of insecticide, fungicide and flower hormone on hoppers (Amritodus atkinsoni, Idioscopus clypealis and I. niveosparsus), other insect pests, diseases (including powdery mildew caused by Oidium mangiferae), fruit set and fruit yield. Only 3 sprays of insecticide, fungicide or hormone, singly or in combination, were performed, i.e. on 12 March (1st), 28 March (2nd) and 12 April. The sprays comprised the insecticides monocrotophos 36 SL (1st; 0.15%), endosulfan 35 EC (2nd; 0.2%) and carbaryl 50 WDP (3rd; 0.2%); fungicides sulfur 80 WDP (1st and 2nd; 0.2%) and Karathane [dinocap] 48 EC (3rd; 0.1%); and hormone NAA (40 ppm), starting from panicle emergence stage. The treatment insecticides+fungicide+hormone showed the best results in hopper control, fruit set, number of fruits harvested and fruit weight, followed by insecticide+fungicide, whereas the treatments consisting of insecticide only and insecticide+hormone were at par. Hopper population was higher but significantly less than the control in the fungicide, hormone and fungicide+hormone treatments. However, fruit set and fruit yield were zero in all these treatments.