White spots on pepper leaves are what pests and diseases

The leaves of peppers have white spots, which may be due to bacterial diseases such as white spot disease, remove the diseased leaves, and spray chlorothalonil at the beginning of the disease, which can kill the wettable powder. It may also be because of infection with aphids, the insect leaves are removed, and cypermethrin emulsifiable concentrate and imidacloprid are sprayed. It may also be due to excessive water accumulation, which should be drained.

The pepper leaves are all white spots, and the back is the same, what's going on?

Like a drug, it's like a white star.

Pepper scabochide is mainly a leaf lesion, the lesions are round or oval, the edges are dark brown and slightly raised, **grayish-white, and there are small black spots scattered on it, which are conidia. You can use zebin for dycoze, copper sulfate for succinate.

Chlormonia copper, can be killed, flusilazole, benz. Azoxystrobin.

and other agents plus trium potassium dihydrogen phosphate.

Spray control. Contact spraying every 7 days.

Prevention and control methods:

1.Use aphid wasps for control, when each leaf has whitefly heads, each piece of bees 3-5 heads, 10 days 1 time, 3-4 times in a row, can basically control its pest.

2.Soak the tobacco leaves in water for about 1 day, and then evenly spray them on the surface of the infected flowers and leaves, for 2 to 3 days, and then rinse the flowers and leaves with water.

3.Insects can be killed with soot, and yellowing leaves can be properly supplemented with a little potassium fertilizer.

4.You can mash the garlic and rub the garlic juice on the leaves with the worms, cut off the bad leaves, and if the branches also have worms, cut them off as well.

5.You can also soak the soil with potassium permanganate and wait for it to dry before potting.

6. I often spray pepper water myself.

Whiteflies, generally insecticides are effective.

Summary. Kiss The white bugs on the leaves of peppers are actually because they are harmed by whiteflies, which are small in size, multiply quickly, and are resistant to pesticides, and are difficult to control once they occur.

Kiss Pepper leaves Chang Xiao have white bugs, which are resistant to attack and are really buried because of the harm of whiteflies, whiteflies are small in size, reproduce quickly, and are more resistant, once they occur, it is difficult to control.

The high temperature of summer and autumn is very suitable for the growth and reproduction of whitefly, and the development rate is very fast.

When changing the stubble and clearing the crop rotation, it should be avoided to rotate the food hosts for whiteflies to eat, such as eggplant, fange eggplant or cucumber, etc., and can be stared at to change the stubble to plant leeks, ginger and other crops.

Strengthen greenhouse management Before transplanting and planting peppers, whiteflies in the greenhouse must be completely smoked, and at the same time, the residues and weeds in the greenhouse must be removed to reduce the insect source in the greenhouse. During the growth period of peppers, ventilation and light should be achieved as much as possible, and environmental conditions that are not conducive to whitefly outbreaks should be built with caves.

The pesticide control of whitefly insect development is ten acres of rapid cultivation, and every 5-7 days is sprayed with an absolute chemical agent. Commonly used agents are: 1500-2000 times of Fucodo, 3500-4000 times of Uranus emulsifiable concentrate, and 2000-2500 times of Baode emulsifiable concentrate.

When spraying pesticides, it should be prepared in strict accordance with the corresponding concentration, and the concentration can not be increased at will, which can slow down the increase of whitefly resistance.

Summary. The white leaves of pepper seedlings may be caused by air damage, and the harmful gas poisoning of pepper refers to the phenomenon of plant damage caused by the high concentration of harmful gases in the field air, and the cultivation of protected land is more serious. Due to the small amount of ventilation, the large amount of fertilizer and some other reasons, the concentration of harmful gases in the protected area is easy to be high, and it is more likely to cause harmful gas poisoning, such as ammonia, nitrogen dioxide, sulfur dioxide, ethylene, diethylbutyl dicarboxyl phosphate, etc.

What is the disease of white leaves of pepper seedlings.

The white leaves of pepper seedlings may be caused by air damage, and the harmful gas poisoning of pepper refers to the phenomenon of plant damage caused by the high concentration of harmful gases in the field air, and the cultivation of protected land is more serious. Due to the small amount of ventilation, the large amount of fertilizer and some other reasons, the concentration of harmful gases in the protected area is easy to be high, and it is more likely to cause harmful gas poisoning, such as ammonia, nitrogen dioxide, sulfur dioxide, ethylene, diethylbutyl dicarboxyl phosphate, etc.

What medicine to use.

<> the branches and leaves of pepper seedlings have white insects (generally aphids), they can be sprayed with 40 dimethoate EC (1000-1500 times liquid) or 50 aphid anti-aphid wettable powder (2000-3000 times liquid) and imidacloprid wettable powder (1000-1500 times liquid). Precautions: Different pesticides should be used alternately when applying pesticides to avoid aphids becoming resistant; The focus of spraying is on the back of the blade.

Is it an early blight of chili peppers.

Pepper topdressing is generally in the evening, about 15 cm away from the roots, and then irrigated and watered immediately after chasing. The principle of top dressing is a small amount many times. First top dressing:

After the initial flowering period of pepper, the first top dressing is carried out when the fruit is sitting, and when most of the plants are set by the pepper, the second water is watered, and combined with watering, the fertilizer is reapplied. Generally, every time the fruit is harvested, combined with watering and topdressing once, each time a high-nitrogen and high-potassium fertilizer is applied per mu.

Summary: Chili peppers are used as fresh peppers for consumption, and dried peppers are used to make them. When making top dressing of fresh peppers, nitrogen fertilizer is biased, but not excessive, otherwise the fruit setting rate of vigorous growth is low.

The focus of making dried pepper is to chase nitrogen fertilizer on the basis of nitrogen fertilizer and partial potassium fertilizer after the fruit set is red. Potassium is the element that determines the color and quality of dried peppers.

Foliar sprays. 1) During the growth of pepper, it is best to combine the spraying of pests and diseases, after fruit set, the appropriate spraying of urea and ribery Yanwo powder potassium dihydrogen solution can effectively prevent flower and fruit fall.

2) At the peak of fresh pepper harvesting, pepper needs to absorb a large amount of magnesium fertilizer, magnesium nitrate solution, and spray it several times.

3) When pepper is deficient in boron, Yanwo boron fertilizer can be used, which has a high safety factor and is not easy to cause poisoning.