The main hosts of cotton bollworm on vegetables are tomato, eggplant, potato, beans, pumpkin, cabbage, and cabbage. Among them, tomato is the most seriously affected. Here is a description of the control techniques of cotton bollworm on tomatoes.
Agricultural control
In the field of phlegm and flooding, combined with the management of the field to carry out cockroaches or soil boring, it can reduce the density of worms. 95% of the eggs are produced between the top of the tomato and the fourth layer of compound leaves. During the peak of adult spawning, combined with pruning, timely topping and crossover, the egg mass can be effectively reduced, and at the same time, the insects should be removed in time. Decrease the number of insects.
Lure adult
The branches will trap the insects. Where there are conditions, at the peak of the cotton bollworm moth, bundles of poplars, willows, acacia, and poplar trees can be used to lure the moths. The branches should be 20cm higher than the crops, 150 branches per hectare, 5-7 each, usually 6-8d for 1 branch. Every morning, the branches are covered with plastic bags before the dew is dry, and the adults are shaken. Focus on killing.
Sex attractants trap adults. During the occurrence of adult cotton bollworm, the male moth was trapped with a cotton bollworm attractant to reduce the fecundity of the female moth. Generally, each cotton bollworm sex attractant can control 667m2, and each attracting core is used for about 20d. Note that the distance between the lure core and the water surface in the trap should be kept at about 2 cm. Therefore, water should be added in time according to the water level in the trap, and an appropriate amount of washing powder should be added in the water to ensure that the sexual attractant traps the adult.
Controlling larvae to control cotton bollworms must eliminate the larvae before the capsules. Once the larvae break into the fruit, the effect of chemical control will be poor. Therefore, it is particularly important to strengthen the monitoring of cotton bollworms, accurately grasp the peak period of adult spawning, and determine the optimal control period. Generally, 3 days after the peak of adult spawning, it is best to control the larvae before they enter the fruit.
One of the following agents may be selected: 10% chlorfenapyr sc (depletion) 2000 times solution, 5% fipronil sc (Ritengite) 2000 times solution, 48% chlorpyrifos EC (Lesburn) 1000 times solution, 2 % Avi WP (vegetable) 1000 times solution, 2.5% bifenthrin EC (Uranus) 2500 times solution. In order to delay the resistance of the insect, it should be noted that different pesticides are used interchangeably. Tomatoes are harvested while flowering, so they must be harvested first and then applied to ensure the quality and safety of the listed tomatoes.
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