ISHS Acta Horticulturae 231: II International Symposium on Mango
EFFICACY OF SYNTHETIC PYRETHROIDS AGAINST MANGO HOPPER AT LOWER DOSES |
| Authors: | A.H. Shah, R.C. Jhala, Z.P. Patel, R.L. Patel |
| Abstract:
Two field experiments were conducted to evaluate the efficacy of various synthetic pyrethroids, namely, permethrin, fenvalerate (both at 20, 30 and 40 ppm) and cypermethrin (at 10, 20 and 30 ppm) against mango hopper, Amritodus atkinsoni (Leth.) The spray treatment of different doses of each pyrethroid was applied after flowering on mango. All the pyrethroids at lower doses were found effective against hopper for more than 2 months. Only one spray of any of the lower dose of permethrin, fenvalerate or cypermethrin was sufficient to keep the mango hopper population below the arbitrary threshold level of five nymphae per inflorescence over a period of 50 days and 5 adults per sweep over a period over a period of 105 days after spraying. | |
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