How to control ladybugs on cucumber leaves?

1. Ladybugs are bright in color and like to gather together in groups, and they can remove branches and leaves with insect eggs and burn them intensively, which can reduce the spread of insect pests. 2. Manually catch ladybugs, use them to fake death, collect them in containers, and can be killed with pesticides or high temperatures. 3. Spraying the ladybug body fluid with water on the potato can have a good control effect.

First of all, you should see if it is beneficial for ladybugs, if not, you should buy some insecticides for insect control, so as not to eat bad cucumber leaves.

You can buy some pesticides. This prevents a lot of pests and diseases. Results are fast. The effect is also very good.

Yellow gourd is a pest of the Coleoptera leaf beetle family, with a wide range of feeding habits, adults and larvae can harm crops, and can harm 69 species of plants in 19 families. Almost all kinds of melons are harmed, the most serious damage is watermelon, pumpkin, melon, cucumber, etc., but also cruciferous, Solanaceae, legumes, citrus, peaches, pears, apples, oak trees and mulberry trees. Adults can eat the young leaves and flowers of melon crops, which is quite harmful [1] .

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1.How do you get rid of aphids on cucumbers?

1.Agricultural control: remove the weeds around the cucumber vines in time, damage the fallen cucumber leaves and dead branches, and destroy the living environment of aphids.

2.Physical control: using the strong preference of aphids for yellow and orange, apply yellow advertising color on cardboard, and apply a layer of viscous yellow engine oil, generally 20-30 pieces per mu; Or take advantage of the silver-gray repellent effect on aphids, and place silver films at regular intervals.

3.Biological control: When aphid diseases are found, ladybugs are released in the field, about 100 calories per mu (20 eggs per card), and attention is paid to protecting the natural enemies of aphids, such as lacewings, aphid flies, etc. In peacetime.

4.Chemical control: 20% acetamiprid soluble powder can be mixed with water and sprayed with 5-10 grams per mu, or 20% dinotefuridin thiamethoprid water dispersible granules can be sprayed with 10-20 grams per mu.

2. What kind of medicine should be used for prevention?

Generally, you can choose to spray 5-10g per mu with 20% acetamiprid soluble powder with water, or spray 10-20g per mu with 20% dinotefuridin thiacaprid water dispersible granules with water. Other common aphidicides: 50% marathon emulsion 1000 times, 50% thiophos emulsion 1000 times, 50% anti-aphid wettable powder 3000 times, deltamethrin emulsion 3000 times.

Summary. In the cucumber field, the whitefly is more serious, and the whitefly has a very mixed feeding habits, which can harm a variety of vegetables, such as tomatoes, eggplants, peppers, etc. The harm of whitefly is mainly to nymphs, the main feeding place of whitefly is concentrated on the back of cucumber leaves, by absorbing the juice of young cucumbers, the leaves are first caused by small spots on the surface of cucumbers, and then they are connected into sheets, and the leaves of the harmful parts are faded, yellowed, wilted, and the plants die when they are serious.

During the growth of cucumbers, the leaves of the superbugs should be controlled with medicine.

Cucumber leaves have worms, what should I do?

In the cucumber field, the whitefly is more serious, and the whitefly has a very mixed feeding habits, which can harm a variety of vegetables, such as tomatoes, eggplants, peppers, etc. The harm of whitefly is mainly to nymphs, the main feeding place of whitefly is concentrated on the back of cucumber leaves, by absorbing the juice of young cucumbers, on the surface of cucumbers to create auspicious or into leaves with small spots, the forelimbs are connected into flakes in the later stage, and the leaves of the harmful parts of the Huiyanshi are faded, yellowed, wilted, and the plant dies when it is serious. During the growth of cucumbers, the leaves of the superbugs should be controlled with medicine.

Foliar sprays of cypermethrin for control. Foliar spray control of avermectin, cypermethrin and other agents.

After the harvest of cruciferous vegetables, remove the old leaves of the residual plants in the field in time, reduce the breeding places of cabbage insects and eliminate some pupa. Chemical control is generally used about 1 week after the peak of eggs, that is, before the larval hatching period to the 3rd instar larvae, and is used 2-3 times in a row;

The following agents can be used: 2 30-50 grams of vegetable insecticide 667 square meters, 750-1000 times of water 50 kg or high-efficiency bt wettable powder, and can also be sprayed with 0 2 avemazine emulsifiable concentrate 2500-3000 times, these three pesticides are biological insecticides, with good effect, not easy to produce drug resistance, pollution-free, and can be used continuously;

Prevention and control should pay attention to grasp the appropriate period of prevention and control, in the field egg period, larvae hatching early spraying, according to the habit of cabbage insects, in the morning or evening on the back of the leaves of the plant evenly sprayed, can effectively prevent and control the harm of cabbage worms.

Agricultural control: remove the weeds around the cucumber vine and the dead leaves and stems in time. Physical control:

Apply cardboard to yellow advertising color and a layer of sticky yellow motor oil, or place a silver film at certain intervals. Biological control: release ladybugs in the field, about 100 calories per acre (20 eggs per card).

Chemical control: 20% acetamiprid soluble powder can be mixed with water, and 5-10g per mu can be sprayed.

1. How to remove aphids on cucumbers

1.Agricultural control: remove the weeds around the cucumber vine in time, as well as damage the fallen cucumber leaves and necrotic stems, and destroy the living environment of aphids.

2. Physical control: use aphids to have a strong tropism to yellow and orange-yellow, take cardboard and paint yellow advertising color, and coat with a layer of viscous yellow engine oil, generally hanging 20-30 pieces per mu; Or take advantage of the silver-gray repellent effect on aphids, and place silver films at certain intervals.

3. Biological control: When aphid diseases are found, ladybugs are released in the field, about 100 calories per mu (20 eggs per card), and attention is paid to protecting the natural enemies of aphids, such as lacewings, aphid flies, etc.

4. Chemical control: 20% acetamiprid soluble powder can be mixed with water, sprayed with 5-10g per mu, or 20% enylacetamiprid water dispersible granules can be sprayed with 10-20g per mu.

Second, what kind of medicine is used for prevention and treatment

Generally, you can choose to use 20% acetamiprid soluble powder mixed with water, sprayed with 5-10g per mu, or use 20% enylacetopridrid water-dispersible granules mixed with water, sprayed with 10-20g per mu. Other common aphid control drugs: 50% marathon emulsion 1000 times, 50% borer pine emulsion 1000 times, 50% anti-aphid wettable powder 3000 times, deltamethrin emulsion 3000 times.

Pro, black aphids on cucumber leaves** Method: Aphids on cucumber leaves can be controlled with imidacloprid with imidacloprid. Aphids on cucumber leaves can be controlled with imidacloprid.

It can be controlled with imidacloprid, thiamethoxam, etc., if it is a greenhouse cucumber, do not choose the emulsifiable dosage form, so as not to cause pesticide damage. Control of aphids: 3% acetamiprid EC 1500 times - 2000 times.

10% imidacloprid 1500 times liquid spray. The above two agents are good for Minchai to spray, and the prevention effect is good.