Is there a better way to have bugs on rape and don t want to use pesticides?

The landlord has a bit of a misunderstanding about pesticides, and now pesticides are not like decades ago, and not every pesticide is poisonous. For example, azadirachtin can control aphids, which is extracted from the fruit of the neem tree, which is purely plant-based and not toxic to humans at all; Aphids don't like its smell and spray the leaves of neem so that the aphids won't feed and will either fly away or starve to death. It's like if you add a spoonful of chili oil to the bowl of people who don't eat spicy food, it won't eat it, but it won't harm people at all, and there are many such pesticides, so there is no need to talk about "medicine" discoloration.

In addition, you can also use a yellow sticky insect board to trap aphids (aphids like yellow and are stuck by sticky shellac when they fly to the board), and you can use a silver-gray film to repel aphids (aphids don't like silver-gray and don't want to come here), but these methods are only effective for winged adults, mainly for early prevention. To control aphids without wings, you can only spray or release natural enemies (the control of releasing natural enemies is not good in China, and it is estimated that you will not be able to use it).

It should be that you have a misunderstanding of pesticides, and the general use of drugs is simpler than other methods, and the effect of biological and physical methods is not very clear, as long as you use the right medicine, there will be no problems, and you must buy pesticides with a short degradation and residual effect.

Biotechnology, a device that emits ultrasound waves to repel insects. Because the device is too expensive, it is generally suitable for large-scale farming, and ordinary farmers still use pesticides.

It can be played. Rapeseed in the seedling stage, transplanting period, seedling stage and flowering stage all need an appropriate amount of pesticides, seedling stage: add an appropriate amount of carbendazim to the soil to prevent rapeseed root rot.

To prevent sclerotinia sclerotinia disease, methyl tobuzin or pythium can be used.

1. Rapeseed needs to be sprayed in the seedling stage, transplanting period, seedling stage and full flowering stage, and carbendazim can be added in an appropriate amount during the rape seedling stage, which can prevent rapeseed root rot.

2. In the rape transplanting period and seedling stage, there will be mold disease and aphids to harm rapeseed, at this time, you can use an appropriate amount of dimethoate mixed with water for spraying control.

3. In the full flowering period of rapeseed, it is necessary to prevent and control sclerotinia sclerotinia disease, and at this time, methyl tobuzin or Pythium can be used for prevention and control.

4. When applying herbicides to rapeseed, it is generally selected after 10 a.m. and before 4 p.m., and the effect of weeding is better during this time; If you spray an insecticide, you generally choose to spray before 10 a.m. and after 4 p.m., when the spraying effect is better.

The planting time of winter rape is generally planted in September and harvested at the end of May, but there are also some areas that are sown in late September, and the planting time is different in different regions, and everything is subject to the actual local situation.

Rapeseed should be ploughed in the fertilization of the soil, the cultivation can be slightly deeper, and the vigorous rape cultivation should also be deepened, in order to better control the growth of rapeseed, so that the seedlings grow into strong seedlings. In the cold years and areas of winter, the overwintering rape should be protected from freezing and moisturizing, and when cultivating and loosening the soil, attention should be paid to cultivating the soil Yonggen, in order to effectively enhance the cold resistance of rapeseed.

Rape flower turned over and returned to the field, make green manure for organic rice, after decay and fermentation, form soil pores, more than half a month can be converted into organic fertilizer, nutrients return to the field, high yield, good fertilizer efficiency, improve soil physical and chemical properties at the same time, but also improve soil structure, improve soil nutrients, soil at this time also has a certain insecticidal and disinfection effect.

Vegetable pests are generally cabbage worms and diamondback moths, which are controlled with avermectin, emamectin salt, chlorantraniliprole, and imidacloprid and acetamiprid for aphids!

Vegetables have bugs. It is a potion to buy vegetables. After five days or a week, the potion was taken. There will be no harm to the human body.

Grow your own vegetables, do not spray pesticides, and can only use physical insecticide:

1. Cover the vegetables with a wire mesh to prevent moths and butterflies from touching the vegetables, so that the vegetables will have no eggs, and there will be no vegetable insects.

2. Set up fluorescent lamps on the side of the vegetable garden, and put the water basin containing pesticides, and the fluorescent lamps will be lit at night to attract moths and other pests to fall into the pesticide basin and kill them.

3. Observe the vegetables frequently, find insects, and manually cull them.

When I was a child, my brother and I used to do this kind of work, and we can also sprinkle some plant ash in the field to prevent the insects from laying eggs and multiplying, and to avoid the increase of insects on vegetables.

If you don't want to spray pesticides, you can catch insects by hand. Just use your hands to catch the worms in the vegetables. If it really doesn't work, it is still recommended to take medicine, after all, it is convenient.

In this case, the bugs can be removed manually. Physical methods can also be used to repel bugs. In this way, the use of pesticides can be avoided.

In the early stage of growth, rapeseed beetle, rape jumping beetle and other serious damage to the leaves, you can soak the seeds with medicine before sowing, and you can also use elixir powder to kill pests after the emergence of seedlings. Late aphids,Cabbage worms, diamondback moth and other serious harm to the growth of rapeseed, can be used to kill aphids with aphids, with sweep to kill cabbage insects, with larval urea to kill diamondback moth. It is also availableSeven-star ladybugand other natural enemies for prevention and control.

Rapeseed cultivation method.

Land selection and land preparation: rapeseed has a strong adaptability, so the requirements for the soil are not so strict, but for the more clay land, it is necessary to pay attention to turning over the land to dry for a few days when preparing the land, and water the land again before sowing, and then sprinkle compound fertilizer and turn the soil again after two days.

Planting method: There are two ways to grow rapeseed, the first is to direct seed, rapeseed.

Sow seeds in rows at certain intervals, and when the seedlings grow, remove the denser areas and use them for cooking. The second way is to cultivate rape seedlings first, and then plant them one by one at certain intervals.

Field management: When the rape grows to 15 to 20 cm, the vegetable field is fertilized and weeded once, this time with urea.

The purpose is to grow seedlings, and when the rape grows to about 40 centimeters, it is a secondary fertilization, and this fertilization is farmhouse fertilizer. The last fertilization is to spray boron fertilizer before flowering, which will help to make the fruit more abundant later.

Disease precautions.

The common diseases of rape are sclerotinia sclerotinia and cataplexy at the seedling stage, which means that you should be diligent, clean up and remove water stains in the field in time, and reduce the moisture. Cataplexy at the seedling stage needs to be sprayed with a special agent. Most growers know that if the rape blooms in winter, it will lead to a significant reduction in the yield of the following year, so in order to prevent this problem, farmers will spray paclobutrazol in advance.

Harvest. Harvesting must be timely, too early there are still a lot of unripe, late then all will fall, so the general harvest time is when the whole rape horn is yellow-green, this is the most suitable period for harvesting, after harvesting to dry, threshing, and then a detailed screening can be.

The vegetables grown in the vegetable field are bitten by insects, and pesticides cannot be used, what are the ways to control the pests?

Grass and wood ash from the countryside can be used to control cabbage insects. Although it is now forbidden to burn wood for cooking in many places, it is still easier for us to get a little grass ash. We collect the plant ash and mix it with water.

The proportion of mixing depends on the situation, and generally the water is 1 3 times that of plant ash. If the infestation is severe, mix less water. Soak the ashes in water for more than 12 hours, then filter out the soaking solution and spray them on the leaves of radishes or cabbage.

If you want its effect to be better, you can also add a little trichlorfon to it, which can have a better effect.