How to control flower pests and diseases? How to prevent flower pests and diseases

1.Pest control method: spray 40% dimethoate 1500 times liquid, in addition to scale insects, other pests can also be sprayed percent.

Cypermethrin 3000 times solution, the control of red spider can be sprayed with 20% dicofol 1000 times. 2. Leaf-eating pest control methods: manually eliminate overwintering insect seedlings, and spray 90% trichlorfon or 50% octathion 1000 times liquid in the initial hatching period of larvae.

You can burn some dead branches and leaves to get plant ash, or buy it directly from the Internet, and then dig a few holes in the side of the pot, and then sprinkle the prepared plant ash into the hole, and then fill the hole with soil, and then hand over some water, which can effectively ** powdery mildew of plants.

1. Pest control method: spray 1500 times of 40% dimethoate.

2. Leaf-eating pest control methods: manually eliminate overwintering insect cocoons, and spray 90% trichlorfon or 50% octathion 1000 times liquid during the initial hatching period of larvae.

Depending on the situation, what kind of insect pest is used in what way.

Diseases and pests in family flower raising, mainly prevention, supplemented by treatment, more observation, early prevention and early detection.

Even if you keep your flowers well, water them at the right time, do daily maintenance, and fertilize them, sometimes your loved ones will still have pests. In order to prevent these flowers from being destroyed by pests and diseases, you should know a little about common flower diseases and how to control them. These are some of the most common pests and diseases found in gardens and potted plants.

White powder: The disease can be seen on the upper leaves, flowers, stems, etc. As its name suggests, it looks like a piece of white paper, powdered paint, and the surface of the plant will leave yellow, which then turns brown. Although the disease is not fatal, it is definitely not beautiful, and if you take it seriously, it may make the sick flower wither.

For powdery mildew to develop in a humid environment, it is best practice to increase air circulation throughout the nursery. Only water plants, if necessary, use insecticidal soap containing neem oil to remove fungus.

Gray mold is a professor at the University of Vermont, noting that this common pest with poor tease can infect a wide variety of flowers. It usually appears on old areas with water stains on the petals and leaves, and then turns into a blurry gray color.

Because it is a fungus, it is easily spread by water and wind.

Spraying 1000 1500 times of water with 80% dichlorvos EC can control inchworms, stinging moths, poisonous moths, canopy caterpillars, dead leaf moths, scaphoid caterpillars, nest moths, moths, star caterpillars, corianders, leaf miner moths, military match insects, aphids, red spiders, mealybugs and newly hatched scale insects and nymphs. For woodworm moths, longhorn beetles, gidding insects and other boring pests, 80% dichlorvos emulsifiable concentrate can be injected into the fecal discharge hole with a syringe 20 50 times of water, and then the insect hole is sealed with slime to kill the pest. Fumigation in greenhouses and flower rooms for the prevention and control of whiteflies, etc., with 1 2 ml of stock solution per cubic meter.

A layer of white powder appears on the back or both sides of the leaf.

A gray mold layer is visible on the plants under wet conditions.

Near-circular lesions with light brown or grayish white in the middle and purplish-brown or dark brown at the edges. The lesions can be extended, and there are small black spots on the lesions in the later stages, and round or nearly round light brown spots can also be produced on the stems, and the lesions are mostly sunken.

When the seedlings have a certain degree of lignification, they are infected with pathogens, and the seedlings stand upright and die.

The leaves are yellowed and the shoots are wilted, which often induces coal stain disease.

The leaves lose green, showing dense and fine gray-yellow or patches, or the leaves are curled and shriveled, and in severe cases, the whole leaves are scorched and yellowed like fire, and fall off.

It will cause leaf curling, shrinkage, deformity, stunted flower development, and even wilting and death, which will also induce coal pollution disease.

The leaves appear pale white spots, and when the damage is serious, the spots are patchy, or the epidermis is punctured, so that the branches wither.

Leaves or shoots are incomplete.

Grass ash potting method: Frequent sprinkling of plant ash on the surface of the pot can greatly reduce the incidence of gray mold in tulips, cyclamen and other flowers, and at the same time increase the absorption rate of potassium fertilizer by flowers, so that the flower branches are thick and colorful.

Vinegar wiping method: With 50 ml of vinegar, soak the cotton ball in vinegar and gently wipe it on the flower stems and leaves, which can not only eliminate scale insects, but also make the leaves that have been damaged by scale insects turn green and bright.

Alcohol rubbing: Gently and repeatedly wiping the diseased leaves with scale insects with 75% alcohol can completely kill the larvae that are invisible to the naked eye.

Baking soda spraying method: spraying the damaged plants with a concentrated baking soda solution can control powdery mildew of more than 80% for flowers such as moon, chrysanthemum, impatiens, melon leaf chrysanthemum, etc.

What medicine to use after a flower pest and disease needs to be decided according to the type of pest. Dimethoate can be used, which is mainly used to control aphids, leaf rollers, Spodoptera litura, flower thrips and net bugs. Imidacloprid can also be used, mainly to control sucking pests and some dipteran and stingy pests, such as aphids, planthoppers, rice weevils, etc.

Dimethoate, also known as dimethoate, is one of the pesticides restricted in China. It has a strong contact killing effect on pests and mites, and can also kill some aphids that have developed resistance to dimethoate. Dimethoate oxide is mainly used to control aphids, leaf rollers, Spodoptera litura, thrips and net bugs, etc., in the low temperature period, the insecticidal effect is faster than that of dimethoate.

After use, dimethoate can be absorbed into the body by the stems, branches and leaves of the plant, and transmitted to the part that is sprayed into the solution. High and low temperature have little effect on dimethoate after use, but it is soluble in water, and the stability will be worse than that of dimethoate after being dissolved by water, and the efficacy will also be decomposed by water.

Imidacloprid is a nicotinoid ultra-efficient insecticide, which can be a highly efficient, low-toxicity, low-residue agent, and is not easy to make pests resistant. It mainly controls stinging and sucking mouthparts pests, such as: aphids, planthoppers, whiteflies, leafhoppers, thrips.

and some pests of the order Diptera and spurs, such as: rice weevil, rice negative mudworm, leaf miner, etc.

If imidacloprid is used many times in a row, the pest will produce antibodies, so it cannot be used often. It has a great relationship with the temperature after use, at high temperature, the insecticidal effect is better, and at low temperature, the insecticidal effect is poor, and it can not be mixed with alkaline drugs or substances when used.