What pesticides to spray fruit trees to kill insects, and when is the best time to spray insecticide

Fruit trees are insecticidal with avermectin.

At present, the most harmless fruit tree insecticide to fruit trees is avermectin. Avermectin is a widely used agricultural or veterinary bactericide, insecticide, and acaricide. Also known as Azidine.

Abamectin is a class of hexadecyclic macrolides with bactericidal, insecticidal, acaricidal and nematicidal activities first developed by Tomoshi Omura of Kitasato University in Japan and Merck Company of the United States.

Compounds, produced by the fermentation of Streptomyces avidium in Streptomyces. Avermectin has stomach toxicity and contact killing effect on mites and insects, and cannot kill eggs. Abamectin is adsorbed by the soil and does not move, and is decomposed by microorganisms, so there is no accumulation in the environment, and it can be used as an integral part of comprehensive control.

Because avermectin is easy to prepare, it is a relatively safe insecticide for crops.

The drugs that can be used to kill fruit trees are:

1.Chlorantraniliprole: Its trade name is Kangkuan, Odten.

It is a new insecticide with low toxicity and high efficiency, which mainly has the effect of stomach toxicity, and has a contact killing effect, and has a special effect on the hatched larvae of Lepidoptera. It has a long duration of effect and is relatively safe for beneficial insects, fish and shrimp. It can control lepidopteran pests such as leaf miners, leaf rollers, heart-eating insects, caterpillars, and spiny moths.

1 2 days after the peak of adult occurrence, evenly spray the branches, leaves and fruits with 8000 10000 times of 35% chlorantraniliprole water-dispersible granules.

2.Cyhalothrin and chlorantraniliprole: It is made of chlorantraniliprole and cyhalothrin in a certain proportion, which has the characteristics of expanding the insecticidal spectrum, improving the rapid effect and control effect, delaying the formation of pest resistance, and can effectively prevent heartworms, leaf rollers, peach borers, caterpillars, etc. on fruit trees.

3.Avermectin: It is a suitable insecticide for fruit trees in the current pollution-free fruit production.

It has a strong medicinal effect against pests and mites. It has a strong contact killing and stomach toxicity effect, and the drug effect is rapid and the prevention and treatment is thorough. It can effectively control aphids, spider mites, heart-eating insects, pear psyllids, spiny moths, beetles and other leaf-eating pests.

Please note that before using any pesticide, you should read the instructions carefully and follow its guidelines to ensure safe and effective control results.

Fruit tree insecticide can be vaccinated with avermectin, chlorpyramide, matrine, mite death, green Weilei and so on.

1. Filial piety avermectin.

Avermectin: It is a suitable insecticide for fruit trees in the current pollution-free fruit production. It has a strong medicinal effect against pests and mites. It has a strong contact killing and stomach toxicity effect, and the drug effect is rapid and the prevention and treatment is thorough.

It can effectively prevent and treat aphids, spider mites, heart-eating insects, pear psyllids, spiny moths, beetles and other leaf-eating pests.

2. Chlorpyramide.

Chlorpyramide is a kind of biomimetic pesticide, this fruit tree insecticide is mainly stomach toxicity, and has contact killing effect. It is resistant to rain erosion, has an effective period of up to 20 days, and is safe for natural enemies. It can control the larvae of lepidopteran leaf-eating pests that damage fruit trees.

3. Marine.

Matrine is a broad-spectrum plant insecticide, with low toxicity to humans and animals, contact killing and stomach toxicity, and can effectively control lepidopteran larvae and red spiders.

4. Mites die.

It has the advantages of strong permeability and long efficacy, and is an ideal fruit tree insecticide to replace dicofol and other acaricides.

5. Green Willy.

Green Weilei Qiaozeyan is a contact microcapsule, the active ingredient is avermectin, which can effectively control the adult worms of longhorn beetles and giddingworms. It has good systemic properties, is a protective and high-quality agent, can prevent and control a variety of diseases such as ring pattern disease, defoliation, white rot, etc., and is an ideal fungicide to replace carbendazim and methyl tobuzin.

It is best to spray pesticides on the fruit when the fruit is fruiting.

Spraying pesticides when the fruit is fruiting, and then spraying pesticides when the fruit is swollen can prevent the fruit from being insected. Fruit tree spraying is not too many times, the key is to hit accurately, and to use medicine in the critical period of disease prevention and control. However, the breeding of germs in spring, the sting of pests is directly affected by the temperature, and after the sting, when the temperature stabilizes above 18, it is the best time to use medicine.

For example, stone sulfur mixture, insecticide, bactericide and so on.

The temperature is low, there is no activity of pests and diseases, it is difficult for the medicinal properties to play a role, and the control effect is also greatly discounted. In the spring, we must grasp the best time to spray. Most of the germs and eggs overwinter in the dead branches and leaves, diseased fruits, and dead fruits, and it is important to clear these things out of the orchard.

However, most growers do not pay enough attention to this, and very few can seriously clean the orchard floor.

Maintenance of fruit trees

Where possible, it is best to use water-saving irrigation, such as drip irrigation and sprinkler irrigation. It can not only save water, but also make the soil water content appropriate, so that the root system can grow well. Intensive summer pruning is also a good way to combat drought and heat.

Thin out the strong branches, long branches, and competing branches on the back of the tree. Increase the amount of pruning appropriately, and use Xiaobi Hall to ensure ventilation and light transmission inside the canopy to reduce the consumption of water and nutrients.

Cutting off unripe shoots and excessive foliage, as well as scorched leaves and sunburn-heavy fruits, can also reduce water evaporation and transpiration. The continuous high temperature and drought have created conditions for the occurrence of mites and aphids, and should be prevented and controlled in time to avoid insect outbreaks. At the same time, the disease can not be taken lightly, under this kind of weather, fruit tree powdery mildew, rot disease and other diseases are prone to occur, to find the rational use of drugs in time.