Cacti have gray white round bugs, how to prevent them?

Probably a scale worm. The scale insects that harm cactus plants are mainly cactus white shield scales. The female shell of the cactus white shield scale is round, grayish-white, slightly raised on the back, mm in diameter; The body of the female insect is flattened, about millimeters long, shaped like a melon seed kernel, pale yellowish white at first, and gradually turns light brown yellow later.

The male is about 1 mm long, elongated, and white. Prevention and control measures: maintain a ventilated and light-transmitting ecological environment and inhibit the occurrence of white shield scales.

When white shield scales occur in cactus plants cultivated in small quantities at home, the insect body can be removed with brushes, bamboo chips, toothpicks, etc. During the hatching period of nymphs, you can spray 40 times of emulsifiable concentrate and 1500 times of liquid. If the scale shell has been formed, systemic agents such as fubudan, ferperion and other systemic agents can be used.

The method is: loosen the surface layer of the potting soil, take out some topsoil, sprinkle the agent evenly, and then cover the topsoil taken out, and water it thoroughly. The dosage is 3 carbofuran granules, flower pots with an inner diameter of 24 cm, 10-15 grams per pot; 5 ferdicarb granules (i.e. 5 aldicarb granules) 3-5 grams per basin.

Aphids: There are many species of aphids, usually green, yellow, black, brown different, aphids occur all year round, generally the temperature is about 29 The fastest reproduction. They mostly gather on the buds, young leaves or young branches of the plant, endlessly sucking the sap, the branches and leaves of the damaged plant are yellow and deformed, the flower buds are corrupted, the flowering period is shortened, the flower volume is reduced, and the plant wilts and dies in severe cases.

Prevention and control methods: bury 30 carbofuran or 30 dicarb granules in the potting soil at a depth of 5 to 10 cm, and it can be effective in 2 to 3 days (highly toxic, beware); Spray with 40 dimethoate 1000 times or 80 dichlorvos 1500 times; The aphid tobacco is soaked in 20 times water for 48 hours, then 20 times water and 1 10 washing powder are added and stirred, and the residue can be used for spraying; Washing powder, urea, and water are stirred into a mixture at a ratio of 1:4:l00, and then used to spray the plants, which can receive the effect of insecticide and fertilization.

Regardless of pests and diseases, we should follow the policy of prevention over metallurgy, remove weeds in time, spray regularly (once every 20 days), and loosen the soil regularly. Due to the change of humidity and temperature, sometimes too humid, sometimes too dry, and the temperature fluctuates, which will promote the breeding of germs and insect pests. It is necessary to strengthen management, improve the cultivation environment, eliminate the breeding conditions of pests and diseases, and prevent problems before they occur.

Common insect pests of cacti include cabbage insects, locusts, red spiders, scale insects, grubs, needleworms, etc. Below I will give you a detailed explanation of its pests and diseases and control, to help you better take care of the various forms of cacti

Control of cabbage insects, locusts:

In summer, it is eaten by cabbage insects and locusts, which should be sprayed with a liquid spray of 1 4 deltamethrin 2000 times to prevent the occurrence of occurrence;

Spider mite:

It is necessary to try to prevent spider mites, so the cultivation environment must be ventilated and the temperature is appropriate, and try to avoid dryness and stuffiness. The agents to control it include 40% dimethoate 1500 times liquid and 40% dicofol 1000 times liquid. In the summer, it is necessary to keep spraying in a cycle of 1-2 weeks, and spray thoroughly before wintering.

Prevention and control of scale insects and cherry blossoms:

Drug control can not have a good expected effect on scale insects, so we should pay more attention to keep the cultivation environment clean as much as possible, cut off the paper strips with many pests and burn them.

Control of grubs, needleworms, ground tigers:

At this time, fertilizer should be applied reasonably, and 1 2 phosphine 1000 times should be used to water to prevent the outbreak of disease and fissure.

It won't die, it's a mealybug, if there are not too many trees, just find a brush to brush it off! If you cultivate more, you can use pesticides to prevent and control, and spray with 400 times the scale shell!

That's a scale worm, and a small amount can be removed; If the quantity is large, it can be eliminated by oxidizing dimethoate or melting scale mites.

Cactus life is very tenacious, it's winter and there are insect infestations, do you put your cactus indoors?

Conventional pesticides and insecticides will do the trick

Cactus mealybug:

Distribution and pests: Greenhouse pests around the world are harmful to cacti and are easy to induce coal pollution disease. Morphological characteristics:

The female is about 2 mm long, dark brown, ovate, with conical hairs around the periphery. When mature, it secretes a white cotton to cover the body of the worm and form a shell. It has a well-developed ventral flap and large conical bristles for identification.

Prevention and control methods】 Improving the permeable environment in the garden or greenhouse can inhibit its growth. In the early stage, it should be removed with a bristle brush or bamboo chip. Protect and utilize predatory predators such as the Tile Beetle and parasitic wasps.

Master the nymph hatching period to spray 40% dimethoate, 50% pine borer, 50% monocrotophos emulsifiable concentrate 1000 1500 times, or 40% rapid culling emulsifiable concentrate 1000 times, or 70% bromoma emulsifiable concentrate 2000 times, or 44% multiworm emulsifiable concentrate 1500 2000 times, spray 2 3 times, every 7 10 days.

Specifically, you can go to "12582 Rural Information Communication" to check. They have cooperation with China Agricultural University, so they will have a lot of majors.

1. Viral diseases:

Symptoms: Cactus virus disease, the symptoms of different species vary greatly, mainly manifested by systematic mosaic and local necrosis.

Mode of infection: Juice infection. During cultivation management such as grafting and branching, hands and utensils are contaminated with the juice of diseased plants, which can carry the virus to spread.

Prevention and control methods: isolate or destroy diseased plants, and do not graft from diseased plants. For strains that may be infected, hand washing with soap and utensils should be taken care of when managing.

2. Stem wither, stem rot:

Symptoms: Mainly occur in the proximal stem, but also in the upper stems. The yellow-green patches of raw water stains gradually soften rot, leaving a dry outer skin or residual mandrel in the later stage, and the decay speed varies with different types of pathogens.

Pathogenesis: Unsterilized garbage soil or vegetable garden soil is used in potting soil, and wounds caused by grafting, low temperature, freezing and insect damage are easy to induce decay.

2. During the seedling period, 50% carbendazim 5 10 grams per square meter of bed should be mixed with fine dry soil, and the bottom pad should be covered. 3. At the beginning of the disease, spray 400 times of Pulik water or 1200 times of 20% methyl phosphate oil.

3. Anthrax:

Symptoms: The lesions on the stem nodes or stem balls are round, nearly round, 4 8 mm in diameter, mostly on the edges of the edges, light brown to grayish-white, with small black spots on them, arranged in a whorl-like pattern, and orange-red sticky spore masses gushing out when wet. There are often faded green halos around the lesions, and as the disease progresses, the whole appears brown and rots.

Onset conditions: severe disease during high temperature, high humidity and rainy weather.

Prevention and control methods: 1. Horticultural control. In the early stage of the disease, if there are lesions, they should be dug up immediately, and part of the healthy tissue adjacent to the lesions should also be dug up, and then coated with sulfur powder or charcoal powder to dry the wound.

2. Spray fungicides regularly to prevent diseases. Commonly used agents can choose 80% anthrax Fumei wettable powder 800 times liquid; 50% carbendazim wettable powder 500 800 times liquid; 50% methyl tobuzin wettable powder 500 800 times liquid; It can also be used with 1000 times of 75% chlorothalonil wettable powder and 1000 times of 70% methyl tobuzin wettable powder, and the control effect is better than that of single use.

4. Cactus disease:

Symptoms: Onset at the stem node. At first, it is green and water-soaked at the rhizome, and at the same time, the stem nodes are soft, the outer skin is sheepskin-like, and the internal tissues are mucus-like rot.

Prevention and control methods: 1. Horticultural prevention and control, the same as cactus anthracnose. 2. At the beginning of the disease, spray 50% methyl copper 800 times, 35% ruixinazole copper wettable powder 800 times, 60% ethylphosphine aluminum 500 times, 70% ethylphosphine wettable powder 500 times, Pulik water 800 times, 58% redomite-manganese zinc 500 times, 64% alum 500 times, 56% Shanshui dispersible granules 800 times, 72% Kelu 1000 times.

1 time every 7 10 days, 3 4 times in a row.

1. Cabbage insects, locusts:

25% bromethrin 2000 times liquid spray can be used;

2. Prevention and control of spider mites:

It should be mainly defensive, and the cultivation environment should be properly ventilated, but a certain humidity should be maintained to avoid stuffiness and dryness.

Commonly used drugs include 40% dimethoate 1000-1500 times solution, 40% dicofol 1000 times solution, etc. In the high temperature and dry season, it should be sprayed once every 7-10 days, and it should be sprayed thoroughly before wintering.

3. Prevention and control of scale insects:

Due to the waxy shell on the body of adult scale worms, drug control often cannot achieve the expected effect, so more attention should be paid to prevention. The cultivation site should be kept clean, and when scale insects are found, bamboo pieces can be scraped in time, and branches with many insects can also be cut and burned.

Drug scale control must be carried out shortly after the eggs hatch and the worm body has not yet grown a waxy shell, and it must be sprayed repeatedly to have an effect. The drugs used are usually mixed with 50% malathion 1000 times, 25% imithion EC 800 times, 40% dimethoate EC and 80% dichlorvos EC mixed with water 1000 times.

4. Grubs, needleworms, tigers: can be watered with 50% phosphine 800-1000 times.

Cactus balls are susceptible to pests such as cacti, white shield scales, and red spiders. The cactus white shield scale parasitizes on the cactus family, and is commonly used to harm cactus, epiphany, arrow lotus, crab claw orchid, cactus whip, white-haired cactus, measuring ruler, etc. In severe cases, the surface of the stem and leaf-like stems is covered with white shells.

This insect uses the stinging and sucking mouthparts to absorb the nutrients of the host, resulting in weak plant growth and yellowish-white parts of the victim, which affects the ornamental value (refer to Magnolia red wax scale for control methods).

For cabbage insects and locusts, you can spray 2000 times of 25% bromethrin.

Spider mite, commonly used drugs are 40% dimethoate EC 1000 1500 times liquid, 40% dicofol 1000 times liquid, sprayed every 7 10 days in the high temperature and dry season. Scale insects, mixed with 50% malathion 1000 times, 25% imithion EC 800 times, 40% dimethoate EC and 80% dichlorvos EC mixed with water 1000 times. For rot disease, commonly used fungicides are zebze, carbendazim and tobuzin.

For golden spot disease, spray with 75% chlorothalonil 800 times, 50% carbendazim or 70% methyl tobuzine 600 800 times. Rust, spray with 25% powder rust 2000 3000 times liquid.

This is a cactus with a "scale worm".

Solution: 1. Use the insecticide mixed with quick-culling EC or Lesben EC and dichlorvos EC in a ratio of 1:l, and spray the agent 3 times in a row.

2. The scale must be treated, 750 1000 times liquid spraying, after the liquid is absorbed by the tree, the scale insect sucks the poisonous sap of the tree body and dies, and the insecticidal effect is good.

It is recommended to use the drug in the afternoon when the temperature is high (the requirement is 28 32, so the temperature of the liquid medicine is fast, the scale insects are easy to be poisoned, and the waxy layer becomes soft at this temperature, which is conducive to the penetration of the liquid medicine into the insect body), spray twice in a row, and the interval is 5 7 days.

It's a scale insect.

Solution: After the liquid is absorbed by the tree, the scale insect sucks the poisonous sap and dies, and the insecticidal effect is good.

It is recommended to use the drug in the afternoon when the temperature is high (the requirement is 28 32, so the temperature of the liquid medicine is fast, the scale insects are easy to be poisoned, and the waxy layer becomes soft at this temperature, which is conducive to the penetration of the liquid medicine into the insect body), spray twice in a row, and the interval is 5 7 days.

Scale insects, this infected, first isolated, and then sprayed with vinegar or garlic juice and water, if you use dimethoate, this thing is toxic, the smell is also big, don't use it if you have children, if you use time you use a cotton swab to get it slowly, but the effect may not be good, you have to keep insisting on it

For insect infestation, it is recommended to scrape off with a toothpick, scrub with alcohol, or take spectroscopy.

There are bugs