*.. JASSID ATTACK ON COTTON..*
=> The cotton jassid
sucks sap from the underside of leaves and leaf buds.When jassid are abundant, cotton growth is stunted,the leaves turn downwards and heavy fruit loss may occur on pre flowering plants.......During aservere attack,leaf shedding occurs.
*....MANAGEMENT....*...
* Natural enemies;
=>.predatory bugs like ladybird beetles and spiders will attack jassid. Do not kill these natural enemies when you see them......
* Culturral control;
=> Clean cultivation ; avoid excessive use of fertilizer (no more then 3-4 bags of urea) as jassid will be attracted to crops higher in nitrogen ,as they will be tastier ..
=>Grow cotton from 15 APRIL to 31 MAY to escape jassid attack...
* CHEMICAL CANTROL........
=> Usev seed treatment (imidacloprid 70ws@10gm/kg seed at the time of sowing
. Apply dimethoate 40EC 400ml per acre at the time of high infestation, no more than twice ..
. Apply acephate75sp 250-375gm per acre at the time when pest pressure is highest..
*Technicalideas5650.blogspot.com
No comments:
Post a Comment