Why are vegetable leaves covered with sores? Why do vegetable farmers work in the field for three days and at two ends? Why do so many seedlings die mysteriously? Yes, it is the number one pest of leafy vegetables - jumping nails.
Jumping nails are also known as vegetable fleas, soil fleas, etc. in some places, which harm a wide range of crops, and can cause harm to radishes, cabbage, rapeseed, mustard greens and eggplant fruits, melons, beans, bananas, etc. In recent years, there has been a trend of aggravation in some areas.
Yellow stripe jumping armor hazards
Often clustered on the back of the leaves to feed, small, can fly, very lively, life expectancy of about 50 days, long can survive for 1 year.
Nibbling on the leaves often causes the damaged leaf surface to be covered with dense oval holes, so that the leaves wither, photosynthesis is reduced, and the value of the commodity is lost.
Jumping nails are tender and like to feed on the young parts of the leaves, so the seedling stage is the most seriously affected, often causing seedling destruction.
Spring, summer and winter are the two most harmful peak periods for jumping beetles. Because jumping beetles can fly well and have high resistance, it brings great difficulty to control.
According to its life law and harmful characteristics, it is necessary to carry out prevention and control in accordance with the following four principles, and the effect is better.
1. Timely
The control of jumping beetles is the most harmful from April to May (the first generation) of the year. In the warmer season, most of the adults dive back into the soil at noon, and it is generally difficult to kill by spraying. Spraying can be done at 7 to 8 a.m. or 5 to 6 p.m., when the adults are less active and effective;
In winter, jumping beetles are particularly active around 10 a.m. and 3 to 4 p.m., and are susceptible to panic and run around, but often lie still at the bottom of the leaves at noon. Therefore, in winter, the adult can be sprayed in the morning when the adults are just emerging, or at noon or in the afternoon when the adults are in a state of fatigue.
2. First outside and then inside the medicine
Jumping beetles have a strong jumping ability, spraying from the inside to the outside, jumping beetles are easy to escape, so when spraying, you should pay attention to spraying from the edge of the field to the inside, in order to prevent adult insects with strong jumping ability from escaping.
If the field block is wide, it should be sprayed around first, and the insects should be closed; if the field block is narrow and long, it can be sprayed at one end first, and then sprayed from the other end, so as to encircle and block and intercept, to prevent adult insects from escaping. Spraying should be light and do not disturb adults.
3. Rule both up and down
The control of jumping beetles only considers spraying on the ground, which is often less effective. Jumping beetles not only harm crop leaves, but also harm crop roots, and should be treated together from top to bottom, combining physical control and chemical control
First of all, after the crop is harvested, the residual leaves are thoroughly collected, the weeds are uprooted and burned, and the soil is deeply turned before sowing to eliminate some of the insect pupae, worsen the wintering environment of the insects, and reduce the harm. In addition, lay mulching to prevent adults from laying eggs on the roots. In the heavily endangered areas, the soil is treated first by sprinkling poisonous soil or spraying liquid before sowing or before colonization, and the insect pupae in the soil are poisoned.
4. Alternate medication
There are many drugs that can prevent jumping beetles, but a single drug is prone to drug resistance, which affects the prevention and control effect. The use of single-dose agents for many years has high resistance, and it is necessary to rotate and compound drugs.
When the larvae are found to begin to harm the roots of vegetables, the roots can be irrigated with octylthion.
When there is a hazard in the field, insecticides such as furosemide, acetamidine, pyridine, pyridoxine, pyrethiazide, lice aphid urea, and Lonsida Axal beetle can be sprayed, which can be mixed or alternately used, but not a single drug.
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