Green worms
At present, there is a pest on many vegetables such as green onions, beans, cauliflower, tomatoes, peppers and so on that is difficult to treat, and farmers call it "green worms", which have been identified as beet moths. The beet noctuidae belongs to the lepidoptera and nocturnidae pests, and is an important crop pest with worldwide distribution, strong resistance and intermittent outbreaks.
First, the characteristics of the hazard
The beet moth is mainly infested with larvae, and its diet is heterogeneous, which can harm the leaves, young growth points, buds and fruits of plants and other organs. The hatching larvae cluster the back of the leaf to feed on the leaf flesh, leaving only the epidermis, forming transparent small holes. The larvae can also spit silk knots, spread with the wind, after 3 years, the larvae eat a large amount, began to disperse into harmful leaves, young stems and fruits, can eat the leaves into holes or absent. Older larvae can also drill green pepper and tomato fruits, causing fruit drops and rotten fruits. Old larvae eat fruit and form binge eating, which is a very harmful pest.
Second, the law of occurrence
3 to 4 generations occur in North China a year, and 5 to 6 generations occur in the Yangtze River Basin every year. Generational overlap is serious, with pupae overwintering in 7 to 10 cm soil, and there is no overwintering phenomenon in South China. The first generation in Zhejiang occurs in mid and late June, the second generation in early and mid-July, the third generation in early August to late August, the fourth generation in mid-to-late September, the fifth generation in mid- and late October, and the sixth generation in late October to late November. Adult insects hide in the shelter of weeds and crops during the day, and are nocturnal, with the most active activity at 20 to 23 o'clock, and have phototropism. 3 to 5 days before spawning, each female can lay about 5 eggs (about 100 to 600 eggs), and the spawning period is about 3 to 5 days.
3. Comprehensive prevention and control
(1) Lights trap adult insects
Beet nocturnal moth has a strong phototropism, light booby-trapping is an effective measure, can use black light lamps, frequency vibration insecticidal lamps for booby traps, every 50 acres set up a lamp.
(2) Late autumn or early winter ploughing the soil to extinguish pupae
In many areas, the beet noctu moth overwinters as a pupa, and can destroy some of the overwintering pupae by turning the soil.
(3) Artificial egg collection and larval capture
The eggs of the beet moth are on the back of the leaves, and the eggs have yellow-white scales, which are easy to identify, and the larvae before the 3rd instar are mostly concentrated on the heart leaves, which is more concentrated. Where conditions permit, this measure may be taken in places where the planting area of each contracted household is not large.
(4) Clean the countryside and eradicate weeds
In the spring from March to April, combined with medium ploughing loose soil, weeds are removed to eliminate the first larvae on the weeds.
(5) Pharmaceutical prevention and control
Because the insect wall of the beet moth is thick, the excretion effect is fast, and the resistance to drugs is strong, it is necessary to master the early control of the insect in the prevention and control of the insect. In the period of control, we are best to choose the beet nocturnal moth larvae before the 3rd age, before the initial egg larvae have not been harmed, spray control. The agent is recommended [Kimil]/[indigovirus + lice mite urea]/[Kang Huan], which is used in turn to prevent beet moths from becoming resistant to drugs.
【Kim mir】
1. The domestic official registration of tank bean thrips, tank bean pod borer and cabbage moth, honeysuckle inchworm, cotton bollworm high content of A vitamin salt
2. China's green food production materials certification products, the first choice for pollution-free crops
3, micro emulsion, safe and environmentally friendly, do not hurt flowers and do not hurt fruits
4. Unique addition of thrips induction aids, stronger lethality and longer lasting
5. Kill the westflower thrips and palm thrips, and control lepidoptera pests such as the grassland nocturnal moth, the rice rice longitudinal leaf borer, the beet noctuce moth, and the twill moth
【Kang Huan】
1. For Lepidoptera pests
2. Reduce the amount of drug used, delay pest resistance, strong effectiveness, more thorough insecticidalization, and more durable insecticide.
3. It has a good anti-effect on kale beet moth, especially suitable for pest strains that are resistant to other insecticides.
【Indateran + Lice mite urea】
1. For Lepidoptera pests.
2. Mainly gastric toxicity and touch killing activity, by blocking the sodium ion channel in the nerve cells of pests, blocking the transmission of nerve impulses, resulting in the death of pests.
3. Insect eggs and kill at the same time.
【Disclaimer】
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