Beet nocturnal moth is a predatory pest that harms kale, cauliflower, cabbage, radish,
Tomatoes, peppers, eggplants, cucumbers, cowpeas and other 30 kinds of vegetable crops.
First, the characteristics of the hazard
The adult beet moth has the habit of nocturnal activity, has a tendency to light on the black light, hides in the lower part of the crop during the day, from dusk to the whole first half of the night is the adult insect feeding, the peak period of egg laying, the eggs of the beet nocturnal moth are mostly produced on the reverse side of the lower leaves of the plant, the first hatching larvae eat the leaf flesh day and night near the egg block, leaving the epidermis or small holes of the leaf, the second and third instar larvae begin to gradually crawl around or spit silk to disperse the damage, after the fourth instar the larvae increase the amount of food, you can also drill cabbage, Chinese cabbage and other vegetable balls and bell pepper, tomato fruit, Cause rotten vegetables, fallen fruits, rotten fruits, etc., eating leaves causes wounds and pollution, making crops susceptible to soft rot, beet night moth larvae and diurnal night out of harm to vegetable crops characteristics, sunny days lurking in the shade around the plant or in the soil cracks, after the evening out of harm to vegetables, often not easy to be found, so can not be taken lightly, plus the larval resistance is much stronger than the twill moth, increasing the difficulty of prevention and control.
Second, prevention and control skills
According to the harmful characteristics of the beet noctuidae moth, the appropriate period of medication should be mastered at the peak of the larval, sprayed at night for control, and the type of drug should be selected from 10% insect mite nitrile (excepted) 2000 times, 30% indigovir (amper) 2500-3000 times, such as missing the first and second instar larvae after the optional 24% methoxyhydrazide (meiman) suspension agent 1500-2000 times spray control. In order to prevent drug resistance, it should be used alternately with pesticides, no need for multiple pesticides to be mixed or single pesticide varieties to be used continuously, and the amount of water must be sufficient when taking drugs, and the spraying should be evenly in place.