What pests are likely to occur in wheat in July? How to prevent it correctly?

What pests are likely to occur in wheat in July? How to prevent it correctly?

1. Aphids. Aphids are common pests in the growth of wheat, and we often call them borers and bees, which are extremely harmful. They mainly suck the juice of wheat (leaves, stems, and ears can be harmed).

If not prevented and controlled in time, it will have a big impact on the yield. For aphids, the best way to prevent them is to plant seeds and mix them with imidacloprid seed coatings. During the growth process, when aphids appear in the field, they should be treated promptly.

The optional chemicals are imidacloprid, acetamiprid, etc. If the control effect is not good, it should be carried out several times every 7-10 days, but in general, aphids are also good for control.

2. Gray planthopper.

The planthopper is also a sucking pest and is also very harmful to wheat. It will not only affect the yield, but also the final quality. For example, it may cause symptoms such as empty grains and smut in wheat.

In addition, some diseases on wheat can also be transmitted by the planthopper, so controlling the planthopper is also very important. At present, imidacloprid can be used as a reciprotic to control gray planthoppers. In some areas, pyridone can be used when imidacloprid resistance is high, but it will be slightly more expensive.

3. Slap sucking worms.

Wheat suckers are also a very common pest in wheat fields. It mainly sucks the juice of the filled grains, causing problems such as empty grains and poor quality. It will also affect the final yield of wheat, ranging from 10% to 20%, or about 50% of the yield.

More seriously, it will directly lead to crop failure. Of course, this is not the situation we want to see. The main control of midges is soil treatment, such as phosphine or methylisosalix.

Secondly, once midges are found in the wild, they should be timely**. Common pesticides such as chlorpyrifos, cyfluthrin (cypermethrin), deltamethrin, etc., can be used. The one-time prevention and control effect is not ideal, and it should be carried out every 7-10 days.

The main pests of wheat and their control methods.

Wheat aphid is one of the important pests of wheat, also known as decay or bees, and belongs to the order Homoptera. Aphids are mainly concentrated in the stems, leaves, ears and other parts of wheat, sucking this part of the sap, affecting the photosynthesis of wheat, resulting in a reduction in wheat yield, which can cause more than 30% loss in severe cases.

For example, gray planthoppers, aphids, sucking insects, corn borers, grubs, must be sprayed with disinfectant in time, but also sprayed with insecticides in time, and the density of attention must be grasped.

Aphids Aphids are common pests in the growth of wheat, and we often call them borers and bees, which are extremely harmful. The best way to prevent this is to plant seeds and mix them with imidacloprid seed coatings. During the growth process, when aphids appear in the field, they should be treated promptly.

The optional chemicals are imidacloprid, acetamiprid, etc.

First, wheat snow rot and snow mold are common, the second is powdery mildew and rust with the weather changes are serious, from seedlings to heading can be damaged, mainly causing seedling wilt, stem base rot, stalk rot and ear rot, among which the most serious damage is ear rot, when the wheat flowering period, it is necessary to water less, too much watering is also easy to cause wheat scab, the most suitable period for spraying is the full heading period of wheat to the full flowering stage.

When wheat enters the April period, wheat is managed differently in different regions. Taking winter wheat in the Huanghuai River basin north of the Yangtze River as an example, wheat in April is the harvest period, which is the vegetative growth and reproductive growth of wheat at the same time, and it is also the period of wheat pollination, which is the critical period of the whole wheat growth period, and the management of this period should be strengthened.

Wheat has a wide range of cultivation in our country, affected by the region of wheat in each region, there are certain differences in the management after entering April, for example, our local April, wheat basically does not have any management, this wheat management may not be reliable for some people, but it is true, there is basically no field management in the wheat field in April.

After entering April, our local wheat has been watered back to green water, of course, the growers have also applied sufficient fertilizer to the wheat, during this period of time the wheat grows rapidly, and the ground will be blocked in the short term, especially in April, when the temperature is not very high, the ground water transpiration is slow, so that the wheat can be said to be full of food and drink, just a day a long man, we also have a local habit, that is, the wheat watering water before spraying herbicides, So there is no need to worry about weeds in the wheat fields in April, and wheat farmers generally start to be busy with other odd jobs.

Of course, the wheat management in April is not nothing to do, in mid to late April, you need to go to the ground to prepare for watering two water, there is a saying in the hometown "not afraid of the first water late, just afraid of the second water short", which means that the first water can be properly watered a little later but the second water can not be delayed, if the ground condition is not good or the fertilizer is not sufficient, it is necessary to water in time and carry out secondary top dressing, to avoid the problem of poor rise of wheat seedlings, good seedlings can be more grain. Therefore, the field management of wheat in April is to check the rise of wheat seedlings and the bottom situation after mid-April, combined with the precipitation and temperature in the region, do a good job of watering the second water, it is necessary to carry out a small range of secondary top dressing is not as vague as possible, after all, it will affect the yield of wheat.

Mainly to prevent the harm of aphids, insects are very harmful, can send a lot of bacteria, and will also affect the yield of wheat.

1. Wheat rust, once wheat stripe rust is found, it should be prevented immediately, because stripe rust will spread very quickly when it encounters suitable moisture and temperature!

2. Wheat powdery mildew.

April and May are the peak season for powdery mildew. This year, powdery mildew is very harmful to wheat. As the disease progresses, powdery white mold will grow on the surface of the leaves, and in severe cases, the leaves will dry up.

Wheat rust, powdery mildew, aphids and red spiders, so in the process of wheat growth must strengthen the management of the land, in the critical period must be sprayed pesticides in time.

At this time, it is necessary to prevent total erosion disease, and at this time planting wheat will get this disease, which requires preparation for insect control.

Wheat planting in April is home to the pests and diseases that need to be prevented from wheat rust, powdery mildew, aphids and red spiders. The preventive approach is to strengthen the management of paddy fields and grasp the critical period.

Wheat total erosion disease is also known as wheat blight and blackfoot disease. Total erosion is a root disease that infects only 1-2 nodes at the base of the root and stem. At the seedling stage, the diseased plants are dwarf, the lower part has many yellow leaves, and the seed roots and stems in the ground turn gray-black, which causes the wheat seedlings to die in a row.

At the jointing stage, the diseased seedlings of winter wheat were slow to regreen and had few tillers, and most of the roots of the diseased plants turned black, and sometimes there was a more obvious gray-black hyphal layer at the base of the stem and the inner side of the leaf sheath.

1. Seed treatment: before sowing, the seeds are treated, which is labor-saving, time-saving, economical and efficient, and is the best control method. 2. Soil treatment:

When wheat is sown, the soil is also treated. 3. Early prevention and control: In the wheat regreening, jointing and heading stages, it is necessary to check in the field regularly.

Aphids harm wheat, reduce yield, spread diseases, absorb wheat nutrients, weaken photosynthesis, and affect growth and development after spreading diseases. Agricultural planting nets.

Wheat seedlings are easy to recruit insects, at this time you can properly spray insect control drugs, so that wheat seedlings grow better, aphids will cause wheat seedlings to grow slowly, will mature later than other crops, will make the wheat harvest bad, will reduce the yield of grain, must be in the wheat seedling period to control the control of aphids.

In the process of planting wheat, it is necessary to mix wheat seeds with fertilizers accordingly, and during the germination of wheat, it is necessary to spray pesticides, deal with the surrounding dead branches and weeds in time, do a good job in field management, loosen the soil, water in time, and maintain sufficient sunlight. Tooth decay is devastating for the growth of wheat, which may delay the heading period of wheat seedlings, reduce yields, and turn the wheat stalks yellow.

Wheat long-legged spider: shape: prismatic, black exhaustion.

In the four pairs of feet, the front and back pairs are longer than the middle two pairs. Growth Habit: Three to four generations are produced in a year.

It prefers to be in arid land, mostly in dry terrain and dryland agricultural wheat land. Nymphs or eggs are used for winter, so they are basically synchronized with the growth and development of rice seedlings, so the damage is relatively large. The daily activity is gradually themed after sunrise, with more activity from 10 a.m. to 6 p.m., and after 9 p.m. it lies in the crevices under the rocks.

Wheat Spider: Shape: nearly oval, dark light brown, with red spots on the reverse side, four pairs of legs almost the same length.

Growth Habits: Two to three generations a year. This type of pest and disease is not drought tolerant and mostly occurs in watered or low-lying wheat fields where the vegetation is dense and cold.

Gradually, nymphs occur gradually in mid to late March. Details of the daily activities are gradually themed after 4 p.m., more active at dusk, and ambushed in the rocks or soil crevices of the wheat field after 8 a.m. Habits:

Spend the winter in the deepest part of the soil with pupa. In mid to late March, the masked nymphs lay their eggs in rows in the tissues around the main vein of wheat leaves. After more than 10 days, the eggs turn into larvae, and the first instar larvae bite the edge of the leaf, and after the instar is relatively large, they bite and feed in a molded or longitudinal direction at the top of the leaf, producing a neat cross-section.

After the third instar, they lie in ambush in the soil around the roots of rice seedlings or in wheat bushes during the daytime, and go out to feed at dusk. There's pretending to be dead.,Burst out with a slight vibration.。。 Prevention and control methods:

Taking advantage of the black and white reversal characteristics of wheat round spiders, watering from 8 am to 4 pm can drown a large number of wheat round spiders; Similarly, taking advantage of the characteristics of the daytime theme activity of the wheat long spider and the dormant state after 9 p.m., moderate watering and drowning insect pests. In addition, it is more efficient to apply appropriate chemical fertilizers during irrigation to increase the destructive power.

When spraying pesticides, spray according to the activity regularity of the two species of spiders, such as wheat round spider can be sprayed after 4 pm, and wheat long-legged spider can be sprayed after 10 am. If the spider sprays when it is hidden, it will only receive twice the effect with half the effort. Downy mildew, rust control methods:

Wheat jointing occurs in the field environment humidity is too large, prone to downy mildew and rust, should be prevented in time, 1 mu with 35 to 40 grams of rust sprayer, every two weeks need to last two to three times. Erosion: Phosphorus, potassium fertilizer and organic fertilizer can be applied to promote the growth and development of rhizomes to improve disease resistance.

Wheat aphids: There are more wheat when the ears are rising, and the sprayer can be prevented with 40% dimethoate pesticide moisturizing emulsion mixed with about 2500 times water.

The common ones are toothworms and wheat field spiders, if you want to control them, then you must buy insect medicine.

Common wheat insect pests mainly include wheat aphids, wheat suckers, etc. We can apply some pesticides to prevent it in the early stage, and we should also take care of the wheat diligently in the process of planting wheat. At the same time, we should irrigate reasonably, avoid rainy weather when spraying, and try to spray when it is sunny.

Wheat aphids are one of the important pests of wheat, also known as greasy insects or honey worms, which belong to the order Homoptera. Aphids are mainly concentrated in the stems, leaves, ears and other parts of wheat, sucking the sap of this part, affecting the photosynthesis of wheat, resulting in a reduction in wheat yield, which can cause more than 30% loss in severe cases. Remove weeds and self-growing wheat seedlings in the field to reduce the suitable habitat and summer host of wheat aphid.

The sowing time in winter and spring can be later than the normal sowing date, and the method of deep tillage should be used as much as possible during sowing, and at the same time, it should be combined with farmland management measures such as formula fertilization.

1. Wheat rust, during this period, due to the relatively suitable climatic conditions (rainy and high temperature) this year, many wheat areas are in the peak period of rust. 2. Wheat powdery mildew, the temperature is low in April and May, which is the peak period of powdery mildew. Powdery mildew is very harmful in wheat.

3. Wheat aphids, aphids are one of the most destructive pests on the earth, and they are occurring in large quantities on wheat at this stage. 4. Wheat red spider, red spider has two peak periods a year, from April to June and from August to October. Spider mites on wheat seem to be particularly severe, not only do they occur early, but they also occur uninterruptedly, seriously endangering the healthy growth of wheat.

Wheat in April to protect against wheat aphids, wheat spiders, wheat powdery mildew, wheat rust, wheat root rot, wheat sheath blight, underground pests.

Strengthen fertilizer and water management, and top application of jointing fertilizer in wheat fields, after heading group leaves yellowing, leaf tip dry defertilization, premature senescence wheat field control of pests and diseases.

Wheat aphids are infested by adults and nymphs sucking sap on wheat stems, leaves and ears. The damage is light yellow spots, and in severe cases, the leaves are yellow. From the emergence of wheat to maturity, wheat aphids are harmed.

However, the losses caused by different growth periods are very different, and the degree of damage caused by different aphids is also different.

Plants will have rotten roots, pests and diseases, yellowing of leaves, plant death, and wheat insects. When we encounter this situation, we can use the way of turning the soil, spraying insecticides, spraying pesticides, spraying nutrient solution and watering to prevent and control.