The heartworm, especially in the plain along the river, is seriously harmed, how to treat the rice h

The most harmful rice borer is the two borer and the three borer, which is often called the drill worm. They are the drill and borer of rice stems to damage rice, resulting in rice ear loss or white ear, which directly affects the yield. The incubation period of each generation of borer eggs is roughly in early to mid-May for the first generation, early to mid-July for the second generation, and early to mid-August for the third generation.

In the areas where the first generation of double-cropping rice is heavier than the second and third generations, the second and third generations are heavier than the first generation in the mixed planting areas of single and double-cropping rice, and the first and second generations are heavier than the third generation in areas where single-cropping rice is dominant. There are four generations of three chemical borers a year. The larvae overwinter in the grasses.

Overwintering larvae pupate and emerge between April and May. Rice is most vulnerable at the scorn stage and booting stage.

At present, there are 1-5 generations in the north and south of China, of which there are more generations in the south and less in the north. The living habits of the big borer, the two borer, and the three borer are similar, and I take the common two borer as an example: the two borer, which belongs to the lepidopteran pest and the moth family, is one of the three major insect pests that harm rice in China

Rice leaf roller, rice planthopper, and two chemical borer. Among these three pests, the two borers are more difficult to control, mainly because they are bored into the rice stalks, and the pesticides are difficult to hit directly.

The adult insect of the borer is a moth and has obvious phototaxis. Moths lay eggs in lumps, preferring to lay at the base of the leaf sheath and at the tip of the leaf. A female moth can lay 5-6 eggs, about 500-700 eggs.

In the past, it was usually burned directly, but now it can't be incinerated, so it can only be cleaned out of the field and disposed of together. This can effectively reduce the source of insects, and destroy the environment for these borers to overwinter, thereby greatly reducing the survival rate of borer overwintering. The borer is the insect that burrows into the stem of the rice grass and is actually a borer, which is a two-insect borer, a three-chemical borer and a large borer.

This insect is really a little weird, the taste on the leaf is enjoyed, it is not satisfied, and it has to drill into the stem to taste the taste of sweetheart, it is really a bit of a frame to see how you can help me.

Some pesticides should be sprayed, some of which are specifically designed to control the rice borerworm.

First of all, the source of insects is eliminated, and the source of overwintering insects of the two borers mainly comes from the straw, so the straw of the current year should be disposed of in time, or treated by disinfection and sterilization methods, and the weeds at the edge of the field should be pulled out in time, so that the source of overwintering insects can be greatly reduced and the insect pests of the second year can be reduced. Second, the use of deep tillage irrigation, spring ploughing rice should be carried out in advance of deep ploughing and overturning irrigation, submerging the rice pile, because when the average daily temperature reaches 12 degrees Celsius, the moth will feather and lay eggs and hatch. Third, after the summer harvest, the early rice roots and straw should be treated in time, and in the double-cropping area, after the first season of rice is harvested, most of the larvae of the second generation have not yet had time to pupate, so after harvesting, it is necessary to plough and irrigate in time to eliminate the larvae and pupae in the rice field.

Pesticides should be sprayed in a timely manner, and should be treated accordingly, and should be watered and fertilized at the time of subsequent management, and the soil should be fertile and well-lit.

First, it is best to burn the grass after harvesting, and second, kill insects and prevent them in advance.

Answer: rice borer, three borer, big borer, these three kinds of borer, all have the common name of borer, the prevention and control of rice borer, should be used before the larvae drill into the rice plant, generally in the egg incubation period of the application, the larvae drill into the rice plant after the application effect is often poor.

At present, most of the rice dead hearts are caused by the two borers, which have the habit of transferring plants, and one larva can cause multiple stem tillers to dry hearts.

Prevention and control of diphos, in the peak period of egg incubation, the application of chlorpyrifos, avermectin and its mixture with insecticides and other commonly used drugs, there is a good control effect, the application of diazinphos, butene fipronil (similar to fipronil is one of the best drugs for the prevention and control of diborer), chlorantraniliprole, fiproramide, cyanopronizone and other drugs also have good control effect. Among them, diazinphos, butylfipronil, chlorantraniliprole, and fiproramide have good systemic conductivity, and when the appropriate period of prevention and control is missed, the dimorph borer has been bored into the rice leaf sheath and other parts when the pesticide is applied, which also has a good control effect, and can effectively reduce the harm of the two borer transplantations.

Rice borer, also known as three borer, two borer, big borer. The larvae burrow the rice plant and feed on the leaf sheath tissue, stem, ear bud and the inner wall of the rice stem, resulting in withered seedlings, dead boots, white ears, etc., which seriously affect rice production.

For the prevention and control of rice borborerworm, the drug should be used before the occurrence of the peak of egg hatching to the first instar larvae, and chlorantraniliprole, emamectin benzoate, indoxacarb, Bacillus thuringiensis, fenozide + organosilicon spray control should be used, and the effect was good.

Rice is easy to suffer from the harm of borers, you can use clean water to pour into the rice, so that the water depth reaches 3 4cm, you can also spray emamectin salt, fenozide, emamectin salt and other pesticides for rice borers, spray once every 5 6 days, spray for a month, you can also use red-eyed bees, frogs and other natural enemies to prevent and control.

1. Irrigation and insect control.

When planting rice every year, after the two borers lay eggs on the rice, the eggs will hatch out of the heartworm in summer to harm the rice, generally can be poured into the rice, so that the water depth reaches 3 4cm on it, wait for a week and then discharge the water, so that the rice borer can be effectively removed.

2. Spray the agent.

If the rice suffers from the borerworm, not only can the irrigation method be used to kill the insect, but also the rice can be sprayed according to the ratio of 1:20 diluted emamectin salt fenozide, emamectin salt, methoxyfenozide and other agents for prevention and control, spray once every 5 6 days, and spray continuously for a month.

3. Release natural enemies.

Rice heartworm will affect the yield, so what is the best way to use rice heartworm, first of all, you need to apply organic fertilizer to it every half month, in the process you can smear secretion on part of the rice, and then release the natural enemies of rice heartworm such as red-eyed bees and frogs, which can effectively remove rice heartworm.

4. Manual insect control.

Generally, when planting rice, it can be watered, and it is found that there is a drill worm that harms rice, and it can be treated immediately, and it is best to deal with it when it is egg, and it is necessary to deal with weeds in a timely manner, reduce the source of insects and damage plants, and only give it the usual corresponding agent to prevent and control it.

Rice borer is commonly known as borer, it is the main insect pest of rice, harming the early season seedling field from late April to mid-May and the late season seedling field from August to September.