What are the measures to deal with insect pests when planting cabbage in a large area?

Cabbage is the easiest to attract insects, the most is cabbage worms, diamondback insects, noctuidas, aphids and root maggots, these are boneless pests, trichlorfon can effectively prevent and kill them, and trichlorfon toxicity is small, little harm to bone organisms, so in the process of planting cabbage, you can regularly spray trichlorfon dilution, which can improve the quality and yield of cabbage.

For this pest on cabbage, we can disinfect the seeds before sowing, if the plant has grown, the most used is dichloride, you can also use methyl liphosphine, dixon, spray once or twice to eliminate it.

Cabbage, as a cruciferous plant, is able to produce glucosinolates and related metabolites. These glucosinolates attract insects such as cabbage worms, moths, and noctuidae to lay eggs on cabbage leaves and then hatch into boneless pests such as cabbage worms. No matter what kind of pests, if not properly controlled, the quality and yield of cabbage fields will be greatly reduced, so you must pay attention to these pests.

Prevention and control methods. For cabbage worms, the most common medicine we use is trichlorfon, which is very toxic and has no effect on bone organisms, but for boneless insects, cabbage worms, it is fatal, and it is basically eliminated by spraying once or twice. Root maggots are small flies that hatch from flies.

Small flies are not phototaxis but are sensitive to fishy smells. Fly stickers can be used to trap and kill, you can sprinkle some bait on the flies, and then hang them in the vegetable patch, to a certain extent, you can eliminate small flies.

The seeds can be disinfected before sowing to avoid the seeds carrying pathogens, and if the plants have grown, they can be sterilized by methyl phosphorus or dixone, so as to eliminate insect pests.

The cabbage planted has been harmed by some green cabbage insects, and I don't want to sprinkle pesticides, how should I prevent it? At present, the effective control method is spraying drugs, but considering the pesticide residues and people's popularity of organic vegetables, Chinese farmers have given up drug control in order to facilitate vegetable sales, and have used various local soil methods to control cabbage worms. The following will introduce you to several soil methods for the prevention and control of green cabbage insects.

Plant ash insecticidal method.

As the name suggests, plant ash is the ash left behind by burning tree branches, straw, etc., and can be found in every kitchen in rural areas. We can use its alkaline water to spray green vegetables. This method is not only insectic, but also can be absorbed by vegetable leaves as foliar fertilizer.

You can also soak the roots of vegetables with plant ash soaking water, and the eggs in the ground will be burned off when they come into contact with the plant ash. This method can not only inhibit the activity of underground pests, but also improve the self-resistance of vegetables. Plant ash insecticide is a control method worth promoting, which can inhibit the control of various crop diseases and pests.

Orange peel insecticidal method.

Mix a few pieces of orange peel with water and soak them in a container for more than 24 hours, then spray the soaked orange peel liquid on the cabbage to get rid of the aphids that eat the cabbage. Because orange peel contains substances that kill insects, it is harmless to people and animals. It is a new type of high-efficiency, broad-spectrum, non-polluting insecticide.

Pepper water insecticidal method.

Sichuan pepper itself is a natural insecticide. The peculiar smell of Sichuan peppercorns is the natural enemy of most pests. The method is to take an appropriate amount of pepper and soak it in water for 24 hours, filter it and spray it on the green vegetables, which can effectively kill the green vegetable pests that harm the cabbage.

Tobacco and tobacco insecticidal methods.

The method of using tobacco and tobacco to kill insects is also very effective, and the control effect on green vegetable pests is more obvious. The method is the same as that of Sichuan peppercorns. Soak an appropriate amount of shredded tobacco or tobacco in water for 24 hours and spray it on top of the cabbage.

The reason why tobacco leaves can kill insects after soaking in water is that tobacco contains nicotine, which is a harmful ingredient that can kill some small animals and insects.

Soak the roots of the vegetables in water with plant ash, and the eggs in the field will be scorched when they come into contact with the plant ash. This method not only inhibits the activity of underground pests, but also improves the self-resistance of vegetables.

The best thing to do is to spray some garlic juice, which will have a deworming effect and will not contaminate the vegetables.

Use some alkaline water for spraying, which can also be effectively controlled, and can better protect plants.

First of all, when planting, we must choose the soil is more fertile and broad land, and we must use farmhouse fertilizer when fertilizing, do not use the fertilizer bought outside, and often water the plants, but also to prevent the occurrence of pests and diseases, if there are small insects, then we must spray insecticides in time. I think that if we can do these things well, we will be able to prevent diseases and insect infestations.

In the season when cabbage is most likely to grow insects every year, spray pesticides in advance for prevention, and you can also use some plant ash to sprinkle on top of cabbage to prevent insect pests.

To do a good job in preventing pests and diseases, to ensure soil fertility, to water and fertilize in a timely manner, pesticides and fertilizers should also be used regularly, and after problems, professional insecticides must be used.

Rotate with non-cruciferous crops for more than 2 years, disinfect seeds before sowing, spray streptomycin, chloramphenicol and phytomycin at the beginning of the disease for control, 7-10 days each time, 2-3 times, the effect is better. When larvae are infested, start spraying pesticides. Commonly used pesticides are chrysanthemum emulsifiable concentrate and maju emulsifiable concentrate, the control effect is better, but it is necessary to pay attention to the alternate use of pesticides to avoid resistance, some pests and diseases are spread through seeds, so when buying seeds, it is necessary to buy seeds from formal channels.

Seeds from regular seed companies are generally phytoquarantine, especially imported seeds. Controlling the seeds is an important measure to control the spread of dangerous diseases and insects and ensure safe production. Crop rotation with other crops can make full use of soil fertility, make cabbage develop well, enhance its resistance to pests and diseases, and reduce the infection of pathogenic bacteria in the soil and the food of pests**.

Cabbage, also known as Chinese cabbage, is one of the common vegetables in our lives.

Cabbage is rich in vitamins, especially vitamin C, regular consumption of cabbage can not only clear heat and relieve pain, but also effectively improve immunity, prevent colds, cabbage is generally planted in direct seed. Before sowing, the seeds need to be exposed to the sun for 2 to 3 days, and then soaked with carbendazim for 24 hours to increase the germination rate and kill the bacteria that may be present in the seeds. After soaking, wash the seeds with water, wrap them in a damp cloth to promote germination, control the temperature at 20 25, and wait for about 3 days for the seeds to germinate.

Cabbage is usually cultivated in rice trays. The nutrient soil in the seedling tray is mixed with fertilizer in the ratio of 1 cubic meter of 5 kg of decomposed manure, kilogram of compound fertilizer, 5 grams of chloronitrobenzene and 5 grams of Pythium, watered until the water content of the nutrient soil reaches 70%, a seed is covered in each pit, and then a layer of fine soil is laid, and after planting, the slow seedling water is poured on the cabbage. At this stage, the ambient temperature is lower.

After watering, the soil should be cultivated and loosened, which is conducive to soil moisture preservation, and is also conducive to improving ground temperature, promoting the recovery and growth of the root system, in the cluster tree period, cabbage needs more water and fertilizer, and can be topdressed first, and nitrogen fertilizer is applied 15 20 kg per mu.

We must spray pesticides in time, pay attention to the prevention and control of pests and diseases, do not water too much, pay attention to water and fertilizer management, and pay attention to the density of planting.

Pesticides or chemicals can be used for prevention, reasonable temperature control, and attention to planting conditions, so as to prevent diseases.

I think that it is possible to spray bactericidal and insecticidal drugs every half a month during the growing season, so that pests and diseases can be prevented.

Powdery mildew is well known. A pesky white moth that hides on the back of crop leaves when it hurts. Inhaling coriander juice with a stabbing inhaler will make the leaves fade and yellow, the plant growth momentum will weaken, wilt, and the secreted feces will be viscous, which will easily cause coal pollution diseases and affect photosynthesis and commerciality.

For the prevention of powdery mildew**, you can use yellow plate attraction, mites, benzena, fumigation and other fumigation.

Aphids, known as putty, bee lai, etc., are common pests among the masters and can puncture coriander juice and cause plant malnutrition. The parasitism of the five coal pathogens secreted by the dry yellow of the young leaves will affect photosynthesis and can also transmit viruses.

Tea yellow and red spider are also the juice of coriander, the plant is deformed and grows slowly, the leaves are hard, the leaves turn yellow, the leaf margins are rolled down, the growth advantage withers, and no new leaves are produced. The tea yellow mite reproduces very quickly.

For the control of this insect, drugs are mainly used, such as avermectin, salixinomycin, etc.

The range of harm from anti-submarine flies is quite wide. In particular, the experts who grow in the facility want to get this bug, which can cause a serious reduction in yield if not placed in time.

The control of this insect can be destroyed by cleaning all hands and focusing on it. Drugs can be used with fly amine, avermectin, inactivated vaccines, etc.

Everyone should be familiar with coriander. It is a common seasoning in our lives. It has a unique smell and is loved.

But it is this special smell that makes many pests evade, so there are not many bugs that hurt the master. Then, growing coriander does not need to prevent insect infestations. Is it implausible?

This statement can be said to be credible. At least the coriander that my family grows sporadically rarely controls pests. Vegetables with fewer pests are not just coriander. For example, vegetables such as garlic and lettuce are vegetables with few insect pests, so they are also vegetables that are grown a lot.

Growing coriander does not need to protect against pests, but coriander is not pest-free, coriander butterflies and coriander aphids are pests that occur during the cultivation of coriander, so they must be prevented in time. Among them, when the number of coriander butterflies is small, it can be manually killed in combination with field management, and when the number of larvae is large, it can reach 20% of Xi'an thundering oil 300 times, and can also reach 90% of trichlorfon 1500-2000 times.

Aphids are also the culprits of coriander virus disease, so coriander seedlings should be prevented with pesticides, once every 7 10 days, 2 3 times in a row, so that mites can reduce the spread of the virus at the same time, but also reduce the occurrence of coriander virus disease.

Aphids are a large group of pests in the kingdom of pests. Since I was a child, I knew that there were cotton aphids, soybean aphids, peanut aphids, etc. in cotton fields! Later, it was found that there were peach aphids, pea aphids, radish aphids, etc.

This pest is not only harmful to crops, but also corrosive to manure, causing the leaves of crops to become moldy, photosynthesis disappears, and plant leaves can only wilt and die after losing their metabolic function. At the same time, when gnawing crops, diseases such as viral diseases can also be transmitted, so mites are the big killers of crops, and masters can't escape.

Everyone should be familiar with coriander. It is a common seasoning in our lives. It has a unique smell and is loved.

But it is this special smell that makes a lot of pests evade, so there are not many coriander bugs, coriander butterfly insects and coriander aphids are pests that occur during the cultivation of coriander, so they must be prevented in time. When the number of coriander butterfly larvae is small, it can be manually killed in combination with field management, and when the number of larvae is large, trichlorfon can be sprayed to kill pests. Trichlorfon** is cheap and works well.

Coriander as a kind of vegetable that is afraid of high temperature, can be planted in other seasons except summer, coriander growth needs a suitable temperature and environment, and farmers also need to pay attention to the treatment of coriander seeds, when selecting coriander seeds, they should choose good quality, rich fragrance, and no obvious mechanical damage on the surface. For the yellow leaves and root rot of coriander, farmers can strengthen the release of air and reduce the humidity during the whole growth period to reduce the occurrence of diseases.

Scientific countermeasures, such as chemical treatment, in the early stage of the onset of pests and diseases, spray 50 times of 500 times of 5% bacterial poison clear and 500 times of 20% virus A water-soluble powder per 667 square meters, 1 time in 10 days, 2 times in a row, and stop using the drug 3 days before collection.

In the early stage of the shed, when the humidity is high, it is necessary to pay attention to the ventilation and dampness, and the disease should be sprayed in time to prevent and control the disease, and it should not be too large for a long time. The control of pesticides is mainly based on soil treatment, carbendazim can be used, sprinkled in the sowing furrow before sowing, and combined with watering and heavy cropping agent in disease-prone plots.

Prevention of pests and diseases starts with seeds, which are the main source of viral infection. When we select seeds, we should choose the seeds of disease-free plants or use disease-free seedbed seedlings when raising seedlings, timely control of aphids, once aphids are found in the young leaves of seedlings, immediately spray with pymetrozine or imidacloprid; It can also be physically controlled with silver-gray film.

There is an optimal time to harvest each vegetable, and it is important to choose the right time to harvest. A few days late harvest will affect the quality, and it is easy to lead to the occurrence of pests and diseases. For example, peppers, timely harvesting can reduce the phenomenon of falling flowers, fruits and leaves.

In order to strengthen the prevention and control effect of pests and diseases, vegetable farmers should strictly comply with the relevant planting and production requirements of greenhouse vegetables, select high-quality seedlings, and at the same time should carry out large-scale irrigation before planting, and implement the disinfection and cleaning of greenhouse planting sites. Be prepared to enter the shed; Before sowing, the seeds and seedbed soil were disinfected with seed dressing and carbendazim to keep the seedbed soil loose, strengthen the management of ventilation, cooling and humidity drainage at the seedling stage, and spray 70% mancozeb 1000 2000 times or 70% methyl tobuzine 800 times solution at the beginning of the disease for control.

Vegetable seedling diseases are prone to frequent occurrences, and the main diseases are early blight, cataplexy, and blight. Therefore, by understanding the pathogenesis characteristics of these common diseases, production management can be targeted. Under suitable conditions, it only takes about 1 day from the onset of the disease to the seedlings, and the roots of the seedlings after cataplexy are dark brown, rotten and sunken, and then the water is lost and dried up.

Improper management of the nursery or seedbed, such as the use of old beds and unsterilized soil for seedlings, resulting in the accumulation of pathogens; The sowing is too dense, and the seedlings are not divided and interspersed in time. Water accumulation on the bed surface after irrigation; Poor thermal insulation performance of the nursery house, freezing or improper ventilation of seedlings will aggravate various seedling diseases.