What kind of bug is on rice? What are the hazards?

1. Rice blast.

The time of damage of the disease is different, and the symptoms are also different, mainly including seedling blast, leaf blast, joint blast, ear neck blast, and grain blast. The seedling blast is yellow-brown and dead, and the leaf blast will appear yellow halo or dark green oval lesions, and brown mold layers are produced on both sides of the leaves. The spike plague will produce brown dots, which will make the whole node black and necrotic, and it is easy to break, and the spike neck blast will make the spike neck brown, resulting in a withered white spike.

Grain blast will appear grayish-white lesions.

Control methods: select disease-resistant varieties, carry out scientific fertilization management, and then increase phosphorus and potassium fertilizer to improve the disease resistance of rice. Thiotricyclazole; or tricyclazole and other agents for prevention and treatment, with an interval of 7-10 days, can play a good prevention and control effect.

2. White leaf blight.

It is easy to be infected at the seedling stage and tillering stage, and after the leaves are infected, there will be green and yellow spots, and after drying, they will form small yellow particles, which are easy to fall off. At the tillering stage, dry seedlings begin to appear, which is manifested as water loss, roll, and wilt, and there will be yellow-white bacteria and pus overflowing from the diseased stems.

Prevention and control methods: strengthen fertilizer and water management, apply plantar fertilizer and rotting farmhouse fertilizer, increase phosphorus and potassium fertilizer, use soaking fruit or strong chlorine essence soaking, and conventional germination and sowing after strong chlorine essence washing. In the early stages of the disease, phylloconazole is used; Chlorbromoisocyanuric acid is sprayed for control, and the control effect is very good.

3. Streak disease.

The disease mainly harms the leaves, which are dark green water-soaked translucent spots at first, and rapidly expand into yellow-brown thin lines or short dashed line spots between the leaf veins, and the lesions are infiltrating green at both ends. The lesions also often overflow with dewdrop-shaped yellow bacterial pus, which are yellow gelatinous small grains after drying, and are not easy to fall off, when the disease is severe, the leaves become withered, and the leaves are curled when the disease is severe, and the field presents a yellowish-white patch, causing the early death of the plant or the inability to tassel.

Control methods: need to strengthen pest control, select resistant varieties, scientific water management, apply well-rotted farm fertilizer, improve the disease resistance of plants, before sowing, can be soaked in 85% trichloroisocyanuric acid wettable powder 300 500 times, after the onset of the disease, the use of chlorbromoisocyanuric acid; Zhongshengmycin is sprayed with water for prevention and control, and the control effect is very good.

There are more than 350 kinds of rice insect pests known in China.

The more common ones are as follows: three chemical borer, longitudinal leaf roller, rice planthopper, rice thrips, rice bract and rice leaf roller.

The stinging and sucking pest, the rice planthopper, is one of the most common insect pests of rice. There are three main types: white-backed planthopper, gray planthopper, and brown planthopper. Rice planthoppers are not easy to find as adults and nymphs lurking at the base of rice stems, mainly by sucking the sap of the plant, which leads to the normal nutrient transmission of rice, and at the same time promotes the wound to be easily infected with diseases, which eventually leads to lodging and yield reduction!

Rice planthoppers. The most suitable living temperature for rice planthopper is: 20-30, which is easy to occur in paddy fields with partial nitrogen fertilizer, excessive planting density, and relatively humid and humid rice fields.

Damage of rice planthoppers

1. Rice planthoppers and nymphs suck harm. 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".

2. Excrement often causes mold growth, affecting photosynthesis and respiration of rice.

3. Spread plant virus diseases. Brown planthoppers can transmit dwarf disease in rice bushes; White-backed planthoppers can transmit rice black-streaked dwarf disease; Grey planthoppers can transmit rice stripe leaf blight, etc.

In the production process of rice, the common insect pests mainly include rice borer, nematode, gray planthopper, rice borer spins silk with larvae, rolls up the leaves of rice, forms insect buds, eats the leaves of rice, causes white leaves, and the damaged rice field is white, and the weight of 1000 grains is reduced.

Borer. It is a pest of rice and belongs to the order Lepidoptera. The borer is a general term for the insects of the Moth family of the order Phosphooptera.

The common species in China are: the three borer, the brown edge borer, the two borer, the Taiwan rice borer and the large borer of the family Noctuidae. The three borer, the two borer and the big borer are the historically large pests of rice.

What kind of bugs are on rice and what are the dangers? Personally, I think it's normal for insects to be like this kind of rice, after all, your kind of rice, its value is relatively poor, and it is easy to eat. Long bugs.

Locusts, grasshoppers, leeches, rice planthoppers, cotton bollworms, etc.

1. Locusts: Locusts have a wide range of food, and can eat the leaves, young stems, flower buds and tender fruits of wheat, rice, millet, corn, beans, tobacco, reeds, vegetables, fruit trees, forest trees and weeds, etc., and bite the leaves into notches or holes.

2. Grasshopper: Insecta, Orthoptera, the common name of some large songworms of the family Mantisidae, which is larger, similar in appearance to locusts, with a grass-green body and slender antennae. The forewings of the male insect rub against each other, and they can make a crisp and loud sound.

3. Leech: grows and breeds in inland freshwater waters, is a traditional Chinese special medicinal aquatic animal, the common characteristics of wide-body golden leech, brown leech and Japanese leech are: body length is slightly flattened, there are suction cups at the front and back ends, and the whole body has 5 ring lines.

4. Rice planthopper: harm rice and other crops by sucking plant sap. There are three main types of planthoppers that damage rice in China: brown planthopper, white-backed planthopper and gray planthopper, among which the brown planthopper is the most serious, followed by the white-backed planthopper.

5. Cotton bollworm: widely distributed in China and all over the world, and occurs in cotton and vegetable planting areas in China. The cotton areas in the Yellow River Basin and the Yangtze River Basin were more seriously affected. In recent years, Xinjiang cotton areas have also occurred from time to time. There are more than 200 species of host plants in more than 30 families.

Rice diseases mainly include stripe leaf blight, sheath blight, rice blast, rice koji disease, seedling disease, bacterial base rot, black streaked dwarf disease, bacterial wilt, dry tip nematode disease, micrococcidious sclerotinia disease, flax leaf spot, red blight, etc.

Rice diseases are generally divided into seedling stage diseases and growth stage diseases. The main diseases in the growth period are sheath blight, rice blast, rice koji disease, white leaf blight, flax leaf spot, dry tip nematode disease, etc. Seedling stage diseases mainly include physiological seedling rot and seedling infection diseases. In the northern japonica rice area, the common infectious diseases at the seedling stage include blight, rot disease, and seedling disease.

There are many reasons why rice suffers from insect infestations, mainly including the following aspects:

1.Growing environment: The environment in which rice grows has an important impact on the occurrence and development of insect pests. Poor soil quality, too much or too little water, and abnormal climate will increase the risk of insect pests.

2.Rice varieties: Different varieties of rice have different resistance to insect pests, and some varieties have weak disease resistance and are susceptible to insect pests.

3.Agricultural production methods: Unreasonable agricultural production methods can also lead to insect pests in rice. For example, continuous cropping, excessive fertilization, and untimely weeding will cause excessive multiplication of insect pests in the soil, resulting in rice damage.

4.Pest and disease transmission: Some pests and diseases can be transmitted to rice through insects, aphids, etc., resulting in rice being attacked by pests.

Therefore, in order to reduce the risk of rice suffering from insect pests, it is necessary to rationally manage the planting environment, adopt scientific agricultural production methods, and carry out pest control in a timely manner, so as to improve the disease resistance of rice and the quality of the growing environment.

Rice can have bugs mainly because they are crops and are affected by various pests and diseases. Common rice pests include rice planthoppers, rice borers, rice thrips, etc., which will suck the sap of rice or destroy the stems, leaves, ears and other parts of rice, resulting in rice yield reduction, death and other problems. At the same time, the environment and management of rice growth will also affect whether there will be insect pests, such as soil pH, moisture, light and other conditions will affect the healthy growth of rice, thus affecting whether there will be insect pests.

In order to prevent and control rice insect pests, biological control, chemical control and other methods can be adopted, and attention can be paid to the management and adjustment of the planting environment.