Accurate control methods of soybean heart borer with rational application of pesticides

Soybean heart borer should adopt the control strategy of "prevention, avoidance and control". On the basis of agricultural control, grasping the occurrence period, quantity and degree of pests, rational pesticide application and accurate control should be adopted.

Soybean heart borer

Agricultural control: 1, the use of insect resistant (tolerant) varieties. The soybean varieties with hairless and hard pod tissue are resistant to heart borer. 2. Reasonable rotation. Rotation with non-legume crops for more than three years to reduce the number of overwintering insects; 3. Ploughing bean stubble land and ploughing wheat stubble land to reduce the source of insects.

Physical and biological control: 1, adopt black light, frequency vibration trapping moth l 2, use 1.5 kg Beauveria bassiana powder to mix 13.5 kg fine soil or plant ash evenly and sprinkle them on the ridge platform of bean field, so that the larvae who fall to the ground will come into contact with Beauveria bassiana spores and die; 3, 20-30 000 Trichogramma are released per mu during the peak spawning period of adults.

Chemical control: 1. Dichlorvos fumigation: in the early stage of adults, cut corn cobs or sunflower stalks into 5cm segments with 100,150ml / mu of dichlorvos EC per mu, soak in dichlorvos, put a stick 5 meters every 4 ridges, and clip it on soybean branches. 2. within 5-7 days after the adult peak, pyrethroids were sprayed to control adults: 25ml / mu mixed with water, and the spray head was sprayed upward from the root of soybean with a knapsack sprayer, so that the back of the lower and top leaves were equally sprayed. Commonly used agents: 80% dichlorvos EC, 25% Kuaishaling EC, deltamethrin, permethrin and so on.