In addition to the common pests such as brown planthoppers, what other pests are there in rice?

1. Rice straight mane thrips, adult and nymphs suck the juice on the leaf surface with a file and sucking mouthparts, causing the affected leaves to produce yellow-white micro-fine spots, the two wings of the leaf tip are curled inward, the leaves are yellow, the seedlings that are damaged early in the early stage of tillering do not rot and live for a long time, the hair roots are slow, there are few or no tillers, and the serious clumps die. Hard-hit rice paddies and burns like fire. The damage at the panicle stage is mainly to damage the panicle bracts, and the ovary is damaged when it enters the glume shell at the flowering stage, destroying the flower apparatus and forming deflated grains or empty shells.

2. Rice locusts, adults and nymphs eat the leaves, and when the whole leaves are eaten up, only the leaf veins remain.

3. Rice water flies mainly eat the seed endosperm of rice that has just germinated, causing a lack of seedlings, or biting off young shoots and young roots, resulting in drifting seedlings.

4. Rice negative mud worms, adults and larvae eat mesophyll, residual leaf veins or a layer of transparent epidermis, white spots appear on the affected leaves or the whole leaves are white and scorched, and the whole plant dies in severe cases.

5. Spodoptera exigua, larvae eat, especially the first generation of larvae are seriously damaged in the seedling and tillering stage, affecting the tillering and panicle. The overwintering generation of larvae is also very harmful to wheat.

6. After the larvae hatch, they crawl to the edge of the leaf or the tip of the leaf to spin silk and conjugate the leaf to make a cylindrical longitudinal insect bract, which is lurking in it.

7. Gill earthworms, in the soil of rice fields or aquatic vegetable fields to feed on humus, although not directly harmful to rice seedlings, but because their bodies turn in the soil, often bury the seeds under the soil, no longer germinate, or cause seedlings to lodging, resulting in lack of seedlings and broken ridges.

8. The larvae gather in the roots of rice seedlings, which is harmful to the base of the stem, causing the base of the stem to rot or break.

9. Rice gall mosquito, the larvae suck the juice of the rice growth point, causing the base of the victim rice seedling to swell, and then the heart leaf stops growing and is elongated by the leaf sheath to form a light green hollow onion tube, and the onion tube stretches outward to form a "standard onion". Rice can be damaged from the seedling to the spike formation stage, and the severely damaged ones cannot be headed, and almost all of them form "standard onions" or twist and cannot bear fruit.

10. White whiteflies, adults and nymphs use mouth needles to insert mesophyll into the mesophyll to suck the sap of rice leaves, causing rice leaves to turn black, wilt and mildew or induce coal pollution disease, which seriously threatens rice production.

In addition to the brown planthopper, the common insect pests of rice include two borer, three borer, rice planthopper, leafhopper, rice leaf roller, negative mud worm, armyworm, rice bug and so on.

Seedling disease, blight, leaf miner fly, negative mud worm, three chemical borer, rice leaf roller borer and so on. These are relatively common insect pests, and they must be prevented in time when planting.

There are many pests and diseases, such as borer, leaf rice blast, big borer, three chemical borer, longitudinal leaf borer, rice thrips, etc., we must prescribe the right medicine and choose the right agent.

There are also insect pests such as two borer, three borer, large borer, rice leaf roller, and rice planthopper.

This is a relatively common pest in rice fields, which is not harmful to the human body, will affect the growth of rice, and will cause problems in rice, such pests are still relatively common.

There are large areas of rice planthopper in many places in Nanchang, which is a small black worm that sucks rice leaves, looks like a small fly, and will bring great harm to crops.

This is a pest that eats rice, and it is generally difficult to eliminate.

It's a very scary bug that can affect crops, it can also affect rice yields, and it can cause a lot of germs.

Ways of rice planthoppers to harm rice: adult and nymph sting and sucking hazards. The damaged rice bushes in the field often start from points and patches, and they are shorter than the normal rice plants from a distance, and are commonly known as "passing through", "yellow pond" or "collapsing circle".

Harmful symptoms of rice planthoppers: many irregular brown spots appear on the stems at the beginning of the damage, and when the damage is serious, the whole plant withers and gradually expands into patches.

Rice is damaged during the booting stage, cannot be headed, and is damaged after heading, which affects the fullness of rice, reduces the 1000-grain weight, and has a high deflated grain rate.

Females lay eggs.

Excreta often induces mold growth, which affects photosynthesis and respiration in rice.

Rice planthopper is one of the main pests of rice in production, and there are two main species: brown planthopper and white-backed planthopper. As long as the environmental conditions are suitable, rice planthoppers can multiply rapidly, causing serious harm to rice production. Generally, it can cause a loss of 10% to 20% in rice production, and in severe cases, the loss can reach 40% or 60%, or even no harvest.

In this paper, the characteristics and causes of rice planthopper were introduced, and the corresponding control measures were proposed.

There are two types of adults: long-winged and short-winged. The long-winged adult has a body length of 4 5 mm, grayish-yellow, the top of the head is narrow, protruding in front of the compound eye, there are 3 convex longitudinal ridges on the face, the ridge color is light, the groove color is dark, the black and white are distinct, the small shield on the thorax and dorsal ** has a pentagonal white or blue-white spot, the sides of the female are dark brown or grayish-brown, and the male is black and connected at the front end, the wings are translucent, and the line of the two wings meet** has a black spot; The short-winged female is about 4 mm long, grayish-yellow to pale yellow, with short wings, only half of the abdomen. Egg-tip capsicum-shaped, thin, slightly curved, about millimeters long, milky white at firstbirth, then pale yellow, with 2 red eyespots.

The eggs are laid in the leaf sheath called the middle rib and other tissues, and the egg grains are arranged in a single row into lumps, and the egg cap is not exposed. The nymphs are nearly fusiform about millimeters long, milky white when first hatched, with gray spots, and then pale yellow, with gray-brown or gray-blue markings on the dorsal body back.

Rice planthoppers have stinging and sucking mouthparts, which suck the sap of rice through the mouthparts, thereby interfering with the normal distribution of photosynthetic products of plants, reducing the nutrients transported to the root system, thereby disrupting the normal physiological activities of the root system and accelerating the senescence of leaves. The adults and nymphs of the rice planthopper gather at the base of the rice bush, suck the sap of the stems and leaves through the mouthparts, and consume the nutrients stored by the plant, so that the nutrient accumulation is insufficient, the grains are not full, and the grain rate increases. At the same time, the coagulated saliva secreted by pests can also form a needle sheath, which hinders the activity of the transport tissue in the rice plant.

It causes the rice leaves to lose water and turn yellow, and the lower part of the rice plant turns black, rots and smells, paralyzed and lodging, and falls into the pond and dies, which is called "passing through" and "wearing the top".

Due to global warming, the Pacific subtropical high is significantly enhanced in the dry season, and the north-south airflow convection is frequent, which creates extremely favorable conditions for the migration of rice planthoppers, which has caused the frequency of rice planthoppers to occur more and more frequently in recent years.

At present, several pesticides that are effective against rice planthopper are imidacloprid, thiazinone, enyldimidanthin, thiamethoxam and pymetrozine, which can be divided into two categories: nicotinic insecticides and chitin synthesis inhibitors.

The more commonly used agents for the prevention and control of rice planthoppers are dimidoxam, permethrin, fenvalerate, deltamethrin, thiazinone, pymetrozine, etc., according to the specific situation to choose the most suitable local agents, in addition, when spraying, due to the high temperature, it is recommended that the amount per mu remains unchanged under the premise of more water, thorough, as far as possible to spray the liquid medicine on the whole plant of rice.

The best thing to do is to snefer with imidacloprid, which can be prevented by 2 to 3 times at night.