What chemicals should be used to control tomato leaf curl disease?
For physiological leaf curl, the control measures are timely watering and fertilizing after fruit set, and covering with a shade net: cover it during the day on sunny days, uncover it at night, and do not cover it on cloudy days. The symptoms of damage by the broad mite (Polyphagotarsonemus latus) are leaves becoming narrower, stiff and upright, shrunken or distorted and deformed, and finally the growing tip becoming bare. For chemical control, 1.8% Abamectin can be sprayed at a 3000-fold dilution. Hormone...
Physiological leaf curl: the control measures are timely watering and fertilizing after fruit set, and covering with a shade net: cover it during the day on sunny days, uncover it at night, and do not cover it on cloudy days.
Broad mite damage: the symptoms are leaves becoming narrower, stiff and upright, shrunken or distorted and deformed, and finally the growing tip becoming bare. For chemical control, 1.8% Abamectin can be sprayed at a 3000-fold dilution.
Hormone-type phytotoxicity: when plant hormones are used to control flower and fruit drop, bending of leaves or growing points may occur, and new leaves cannot unfold normally. The control measure is to choose an appropriate concentration when using them, generally 15-20 mg/kg; when the temperature is high, the concentration should be lower. When using them, take care to prevent the solution from touching tender leaves or growing points, and never spray it on them.