Rice locusts affect rice yield, how to control rice locusts?

Generally, the egg mass is laid in the ridges, barren beaches, embankments and other soils, centimeter deep or weed roots, and overwintering between rice stubble. In the spring of the following year, the young nymphs swarmed after egging. Feed on the grasses around the field, begin to disperse after 3 instars, move into the field as a pest, use the medicine in the peak period of the young nymphs, mix with 20 30 liters of water and spray evenly, including the weeds around the paddy field to apply pesticides and control.

Exterminate rice locusts before they spread. Remind rice farmers to pay attention to the application of pesticides in paddy fields, focusing on spraying weeds around the edges.

We farmers should pay attention: after harvesting, we can put the straw in the field to create a good living environment for spiders; or to collect the spider egg sacs found before and after harvesting in a safe place to protect them; You can also use ducks to eat locusts, and the effect is also good. Nowadays, China has perfect prevention and control measures in dealing with the locust plague, such as biological control, chemical control, and pathogenic microbial control, which can effectively eliminate locusts.

Pathogenic microorganisms that have a targeted effect on locusts can greatly limit the number of locusts and their ability to swarm.

To reduce the habitat of locusts, some locusts occur in low terrain, we can transform such plots into ponds, fish and shrimp, so that the locusts can be greatly reduced, and locusts will be better controlled. Biocontrol. Use natural enemies to control insect population density.

The natural enemies of locusts include birds, frogs, beneficial insects, mites, pathogenic microorganisms, etc. It is necessary to create more environments conducive to the survival of natural enemies and increase the number of natural enemies.

Diseased locusts also lay eggs with microsporidia. The disease can spread among locust swarms through food contamination and locust biting each other, creating a long-term epidemic, just like the flu. Therefore, after a single control, the disease can be endemic in locust swarms for many years.

Dicotyledons such as soybeans are also fed when hungry. The main habitats are extensive cultivation, low-yield (overgrown) crop land, reed land, wasteland, reservoir area, saline-alkali tidal flat and other locust suitable habitats.

The use of biological pesticides for control, currently used for the control of locusts are locust microsporidia, Metarhizium aeruginosa and neem. Microsporidia locusts are locust-obligate, single-celled protozoans. Locusts can cause microsporidiasis when they feed on food with microsporidiasis.

The first is to choose a rice variety that is resistant to insect pests, and secondly, it must be sprayed.

Some pesticides should be sprayed. Some pesticides can wipe out rice locusts.

The prevention and control of rice blast is an important task in rice production. This work is a systematic work that cannot be done by medication or drying the fields alone. Prevention should be the mainstay, supplemented by the best, and work should be carried out in an all-round way.

According to the survey, the rate of diseased leaves in the field is between 2% and 5%. In the plots where the leaf blast occurred earlier, the phenomenon of leaf scorching has appeared.

<>Compared with the same period in previous years, this year's rice blast came relatively early. However, the local incidence is severe. Put an end to all causes of the rice plague.

Qingjianghe believes that the early occurrence of rice blast this year is mainly due to weather reasons. Under the conditions of saturated air humidity and suitable temperature, pathogens invade quickly, and rice can become sick in about a week. In areas where the temperature drops and where there is more rain and fog, it is more suitable for the epidemic and spread of rice blast.

What's even more ridiculous is that when checking the situation in the Heming community in Qingjiang, a farmer saw that after the rice went up the mountain due to rice blast, he also used urea"Seedlings"Isn't this a strange practice that backfires? For the occurrence of rice blast, in addition to the cultivation density, fertilization level, and planting technology management, the selection of varieties should not be underestimated. The selection of disease-resistant varieties should be planted rationally, and non-disease-resistant varieties should be planted in a large area in a certain local area, which is easy to cause the epidemic of rice blast.

In addition, the amount of nitrogen fertilizer should be controlled, the shallow water layer of the field should be maintained, and the humidity in the field should be reduced as much as possible. Remove weeds at the edge of the field and increase the ventilation and light transmission of the field. Scientific fertilizationScientific application of nitrogen, phosphorus and potassium fertilizers to improve the stress resistance of rice.

Finally, chemical control should be strengthened after the initial lesions of rice blast were found in the field. Commonly used drugs are rickavid, chunleimycin, rickvenjing, rickvenbi, rickvenling, rickvennuo, etc. 1. Rickvenjing single dose, rickwenbuzole, pyraclostrobin and other compound preparations have good prevention and control effects.

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In early spring, the grass in the field can be dried and fertilized, so that the locust eggs can be killed to the greatest extent, and some ducks can also be put in the field, because ducks can eliminate locusts, and secondly, we must grasp the time when the Daohuang appeared, and carry out drug spraying, which can eliminate the existence of rice locusts to the greatest extent.

When rice locusts appear, some pesticides should be sprayed to increase the light of the sun, and the rice that has been harvested from rice locusts should be pulled out to prevent these rice from being transmitted to other rice.

It can be artificially exterminated before the eggs hatch, and low-toxicity and high-efficiency pesticides can be used to kill insects, implement the protection of plants and animals, and protect the natural enemies of locusts.

Spray some pesticides on rice, pay attention to the method of spraying pesticides, weather, and choose pesticide varieties when spraying pesticides.

<> locusts eat a large amount of food, they will bite the leaves of plants into notches or peacock holes, and when locust disasters occur, they will eat grain into land trapped, affecting grain production and causing economic losses. Generally, malathion + second-line oil spray can be used to prevent and control locust disasters, or poison bait can be used to trap and kill.

Summary. Hello, sorry for your question.

The growth period of rice is relatively disordered.

With the continuous adjustment of planting structure, the basin along the Yangtze River has changed from double-cropping rice to single-cropping rice. In recent years, the area of single-season late rice has gradually expanded, which provides food for the early migration of rice species and is conducive to spawning and reproduction. contributed to the rise of the population; It provides an abundant source of native worms for offspring occurrence, which leads to an increase in the frequency of occurrence! Another aspect is that the high temperature and drought of the weather in the early part of this year led to the disorder of the rice growth period, resulting in the disorder of growth between fields and between plants, which is not accurate to grasp the time node of pests and diseases, resulting in the difficulty of rice leaf roller borer.

Why rice borers are so difficult to prevent.

Hello I am honored to have your question: The growth period of rice is relatively disordered, and with the continuous adjustment of the planting structure, the basin along the river has changed from double cropping rice to single cropping rice; In recent years, the area of single-season late rice has gradually expanded, which provides food for the early migration of rice species and is conducive to spawning and reproduction. contributed to the rise of the population; It provides an abundant source of native worms for offspring occurrence, which leads to an increase in the frequency of occurrence! Another aspect is that the high temperature and drought of the weather in the early part of this year led to the disorder of the rice growth period, resulting in the growth of the field and the field and between the plants, which is not accurate to the time node of pests and diseases.

In fact, the white spots of rice prove that the rice has been harmed, the borer has penetrated into the leaf sheath, and the rice leaf roller has been wrapped in the rice leaves, and the liquid medicine is difficult to spray the insect body, and the contact agent is difficult to kill. In the prevention and control to prevent the occurrence of problems, from the beginning of the rice tillering every 7 - hail 10 days spray control, when found that there are adult migratory insects in the rice field to dismantle the old flying to spray control, do not wait for the eggs to hatch into larvae and then to control, no pests and diseases to prevent it.

Do you have any questions?

There are also similarities and differences between plant fungal diseases, bacterial diseases and viruses and the invasion routes and primary infection sources and transmission routes.

How to determine the phytosanitary object? Is it possible to transport citrus from Hunan like Shandong? Why?

Okay, I'll get back to you right away.

It is possible to transport citrus to Shandong.

Summary. Locusts do not feed on rice borers, they attack a variety of plants, including crops, grasslands, and forest areas.

Locusts do not feed on rice borers, they attack a variety of plants, including crops, grasslands, and forest areas.

Fellow, I really didn't understand, I can be more specific.

Locusts and rice borers are both insects that harm crops. Locusts generally feed on a variety of plants, while rice borers burrow into rice ears and eat their interiors. From a theoretical point of view, locusts can eat rice borers, but in fact, they have different nutrient absorption methods and insecticide excretions, and locusts are not the natural enemies of rice borers.

Moreover, locusts are large in number and eat in large quantities, which can cause great damage and further aggravate the difficulty of agricultural production. Therefore, in agriculture, we also need to adopt more scientific and effective agricultural insect control methods to ensure the harmless growth of crops.

Locusts are the most harmful to crops during the adult stage.

In general, locusts go through four stages of development: egg stage, larval stage, adult stage and egg laying stage. Adults and locusts have the same feeding habits, both are herbivorous, and the adult stage is highly nutritious, accounting for more than 75% of the total food in a lifetime. They bite the leaves and buds of plants with chewing mouthparts into gaps and holes, and in serious cases, they eat up the leaves and buds of large areas of plants, causing major economic losses in agriculture, forestry and animal husbandry.

Some species are oligophagous pests, such as the East Asian locust, which feeds only on grasses and sedges; Some species are polyphagous, such as the Giant Cushion Locust. When the season is dry, they are more gluttonous, and the large amount of food they eat is excreted from the body without being fully digested, so they obtain a large amount of water from it to supply physiological and metabolic needs, thus increasing the degree of harm to crops.

Adult worms, because the organs are mature, have a larger range of activity.

larva, because it was not yet capable of flying at that time.

The period when locusts cause the greatest damage to crops is the adult oviposition stage, the nymph stage, and the adult flying stage.

1. Adult oviposition period.

After the adult eggs are laid, locust eggs are an important primary feed**, and a certain amount of locust eggs can lead to a sharp decrease in the number of primary feed, threatening the growth of crops. In addition, the excrement of locust eggs is rich in ammonia nitrogen, which can burn plant leaves and affect photosynthesis when accumulated in large quantities.

2. Nymph stage.

After the nymphs hatch, they will collectively forage and eat all kinds of plants, especially green forage crops such as bezomes, which can cause greater damage in a short time. During this period, locusts eat the most and cause the most damage.

3. Adult flight period.

Before the adults fly and lay eggs, they need a lot of protein and fat, and they will concentrate on foraging and eating a large number of crops. At this time, a large group of adults feed at the same time, which can lead to the complete death of agricultural crops in a very short time.

Locust hazards

Destruction of crops. Locusts are plant-feeding insects that can cause terrible damage to crops, meadows, and even fruit trees, among other things. Among them, the most serious is the destruction of crops, whose huge number of bodies will completely cover the entire field, eat up the leaves and shoots on the crops, and cause countless farmers to suffer huge economic losses and survival pressure.

Leads to ecological disasters. Large numbers of locusts gather together, creating a vicious cycle that can cause more serious damage to the region's problems such as desertification, land degradation and ecological imbalance. At the same time, locusts can also carry viruses and other disease-specific mimicens to spread, bringing great risks to the occurrence of local epidemics.