Potato insect pest ladybug is the main disease, what season is potato ladybug prone to appear?

It is easy to appear from spring to summer, and pests like this can be seen in daily life, and they look very red on the outside.

It is generally easy to appear in summer, and this insect is generally very easy to appear in hot weather, and the harm of this insect is also very great.

It usually occurs in winter. And it occurs more frequently in winter. Because the temperature is very low in winter.

1. Ground tiger, belonging to the family Noctuidae, has developed adult mouthparts, polyphagous crop pests, many species, and more than 10 kinds of agricultural crops cause harm;

2. Aphids, also known as Xiaochang socks and honey worms, are a class of herbivorous insects, including all members of the family Aphids;

3. Potato ladybug, belonging to the family Coleoptera, adults and larvae peel off the mesophyll on the back of the leaf, leaving only the epidermis, forming many irregular translucent fine concaves, like the bottom of the basket;

4. Grubs are the larvae of the golden tortoise shell, also known as the white soil silkworm and walnut insect, and the adult is commonly known as the golden tortoise shell or beetle, which harms a variety of plants and vegetables. According to its feeding habits, it can be divided into three categories: herbivorous, fecal-eating, and saprophyrcus. Among them, the herbivorous grub has a wide range of feeding habits, harms a variety of crops, cash crops and flower seedlings, likes to eat freshly sown seeds, roots, tubers and seedlings, and is a worldwide underground pest, which is very harmful;

5. Needleworm is the larvae of the kowtow insect, which harms the roots, stems and organic matter of plants; Xunji.

6. Mole crickets, underground insects, small to large bodies, fusiform bodies, special digging feet for forefeet, female lack of ovipositors, male external reproductive structure is simple, male and female can be identified by wing veins.

Artificial egg mass removal. In the peak oviposition period of female adults, organize manual removal of egg masses, and can also remove insect leaves before the initial hatching larval stage is not dispersed, and concentrate on extermination. It can be sprayed with 80% dichlorvos 1000 times or 90% trichlorfon 900 times; It can also be sprayed alternately with 20% fenvalerate or cypermethrin emulsifiable concentrate 1800 times.

Pharmaceutical prevention and control. It can be sprayed with 5 Lyflin EC, 2 5 dichlorfen EC 3000 4000 times, or 90 crystal trichlorfon 1000 times, or 50 dichlorvos EC 1000 times. Perform field spraying.

If it is used more than twice, it is best to alternate the agent to prevent the ladybug from developing resistance.

<> at the peak of the emergence of overwintering adults and the early stage of oviposition, pesticide control should be carried out, and continuous control should be carried out. When applying pesticides, you can also add imidacloprid, pyridone and other special agents for aphid control. In order to promote the nutritional growth balance and reproductive growth of potatoes, comprehensive control was combined from the seedling stage to the early flowering stage of potatoes.

Before the emergence of seedlings should always keep the soil moist, in case of drought need to be irrigated in time, should be ditched irrigation, prohibiting flood irrigation, water can not be soaked on the surface of the box to the seed potatoes, do not flood, pay attention to timely drainage and drying. Nowadays, many people use organic fertilizers, such as the manure of pigs, ducks, cattle and sheep, which is actually easier to attract insects.

Remove weeds and debris from the ground, the edge of the ground and the edge of the ditch in a timely manner, and take them out of the field for treatment, so as to reduce larvae and eggs parasitic. Insect traps such as insect trap lamps and sticky insect boards can be used to kill bugs! To plough the ground deeply, especially in autumn, the overwintering larvae and eggs can be turned over to the surface and freeze to death.

Mix the poison bait with fried wheat bran and cornmeal, make poison bait, and sprinkle it in the field. There is also the planting of potatoes should choose the soil is fertile and loose, and the soil with sufficient sunlight is planted, if the potato grows in a dark and damp soil, there will definitely be ant holes and insect eyes.

The nutrient distribution and ventilation and light transmission conditions of the plants were improved by the whole plant pruning. Pay attention to cleaning the field and eliminating weeds. After the potato is harvested, the residues are sorted out to reduce the number of subsequent insect sources.

You can use 4% acetamiprid 4000 times liquid spray spray, or you can use 50 grams of S-fenvalerate 10-20 ml mu spray or 50% anti-aphid 10-18 g mu spray, it is best to cycle different agents to prevent ladybugs from developing resistance.

In the early stage of potato growth, it is necessary to spray pesticides to prevent pests and diseases, and to regularly top dressing to ensure the growth of potatoes, and the nutrition is sufficient, it will not be easily affected by pests and diseases.

Before planting potatoes, you can put some medicine for insects in the soil, so that there will be no insects for a period of time when they are buried.

There are many insect pests in potatoes, and the main insect pests are potato ladybugs, aphids, grubs, needleworms, ground tigers, etc. The special prevention and control methods are as follows:

1. Underground pests. There are mainly ground tigers, grubs, needleworms and mole crickets. 400 500g of 50% phosphine emulsion and 3% phosphine granules per mu, mixed in 50 fine soil or sand, applied into the furrow during autumn ploughing or before sowing, raking or sowing soil.

In the peak stage of adult insects, spray 1000 times of 50% phoxanthion emulsion, or 1000 times of 90% crystal trichlorfon, or 3000 times of deltamethrin (trichlorfon) emulsifiable concentrate, or 3000 times of 20% fenvalerate (rapid dichloride) emulsifiable concentrate.

2. Aphids. It is controlled with 50% anti-aphid wettable powder 2000 3000 times, or matrin insecticide 1000 times, or nicotinine azadirachtin EC 1000 times, or 10% imidacloprid wettable powder 2000 times, or deltamethrin EC 2000 3000 times, or 20% fenvalerate EC 2000 3000 times.

3. Potato ladybugs. Before the larvae disperse, spray 3000 4000 times of kung fu liquid, or 1000 times of 40% dimethoate emulsifiable concentrate, or 3000 times of deltamethrin (dimethan) emulsifiable concentrate, or 3000 times of fenvalerate (rapid dibutyl) emulsifiable concentrate, or 1000 times of 50% phoxanthion emulsion.

Tools Raw materials.

Grass ash, sprouted potatoes.

Shovels or shovels, baskets.

Preparation stage. 11.Choose a sunny and well-drained plot and apply base fertilizer, usually potassium fertilizer, such as plant ash is good, or fermented chicken manure. It is better not to choose a plot where the potatoes have been harvested for two years, because then the potatoes are prone to disease and do not grow well.

In addition, choose slightly acidic soil, potatoes are not easy to scar, small skin is easy to rub off, =. =, I said that when I was a child, I loved to rub the potato skin, and I picked up a large piece of it, thinking that I could also make a small opening in the potato skin and rub it off completely.

Step to read. 22.Potatoes can be planted in December, January and February. If you don't have one, go to the market in February and buy sprouted potatoes.

33.Site preparation. Remove all the big stones and weeds, it is best to use cooked land, apply base fertilizer, mainly organic fertilizer and potassium fertilizer, and use grass ash for burning wasteland.

Cut the potatoes.

1. At the end of December and January, you can put the potatoes that will sprout in a warm and bright place for germination, so that they can be planted in February. Small tender sprouts will emerge from the eyes of the potatoes, protect them well, they are all small potatoes in the future.

Step to read. Step to read.

2. Cut the sprouted potatoes into cubes, large potatoes can be cut into several more pieces, and each piece is guaranteed to have two to three sprouts.

Step to read. Grow potatoes.

1. Smear the wound of the diced potato with plant ash, or leave it untouched. Then put them in the soil, about 15 cm apart from each other.

Step to read. 2. Potatoes do not need to be watered when they are planted, because this is the most abundant rain in spring, and potatoes can grow without fertilization, and if you want to fertilize, you can sprinkle some potassium fertilizer appropriately. It is not suitable to use fermented human and animal manure or urea, which can make potatoes unpalatable.

Potatoes bloom too!

Early blight. The lesions are brown to black-brown, with distinct whorls and a layer of black mold. The lesion is hard, generally does not rot, and sometimes cracks from the lesion in the later stage.

Sometimes it can also damage potato tubers, forming round or irregularly shaped, dark, slightly concave, and well-defined lesions. The potato flesh of the diseased part turns brown and dry rots in the later stage. Late blight.

Late blight is a fungal disease that is severe during the rainy season. At first, dark green water-stained lesions appear on the tip or edge of the leaf, and gradually expand, showing black-brown burnt spots, and in severe cases, they become burnt black, emitting a putrid odor. The lesions are slightly concave and grayish-brown, and there are rust-brown spots of different shades when cut.

Black shin disease. During the whole growth period of potato, its stems and tubers are affected by black shin disease. When the seed potato disease is severe, it rots before germination and cannot emerge, and there is a lack of seedlings and broken ridges in the field; Seed potatoes can emerge when the disease is light, and after the plant height is about 10 20cm, the symptoms are successively presented, that is, the diseased plant grows slowly, is short and erect, the stems and leaves gradually turn yellow, and the top leaves are curled to the midrib, especially when the temperature is dry, the wilting symptoms are more obvious.

You can buy some pesticides and mix them in the soil fingers of potatoes, you can hang some silver gray film or mold bucket with silver-gray film strips in the potato field, and you can also put some sweet and sour liquid in the land, which can play a role in removing potato aphids.

The simplest and most effective way is to directly talk about spraying the corresponding pesticides, so that the harm of aphids can be directly solved. Moreover, it is necessary to choose potatoes that have high disease resistance for planting, and to fertilize in time to help potatoes grow healthily, and to keep the soil moist, so that potatoes have a good growth environment, so that the quality and yield of potatoes can be effectively improved.

1. Take advantage of the natural conditions of cold, windy and humid.

The maximum temperature of aphid activity is 25 degrees, and the number of aphid breeding generations is greatly reduced at temperatures below 15 degrees. At the same time, it can prevent aphids from taking off and Zina from spreading the virus. Therefore, cold conditions are not suitable for aphid breeding, feeding, migration and transmission of viruses, but such conditions are very suitable for potato growth.

2. Seed potato fields should be kept away from virus* bean fields.

According to the migration and transmission distance of aphids, the original soybean seed and first-class seed potato breeding base should be at least 2000 meters away from the soybean production field and other solanaceae fields.

3. Avoid the peak of aphid migration.

According to the migration and transmission time of winged aphids, the appropriate sowing and harvesting dates for soybean ackers can be arranged, such as early sowing or staggered sowing, which can reduce aphid poisoning.

Take advantage of the yellowing properties of aphids. Physically trap aphids in the field with yellow adhesive boards. The attachment of aphids to silver-gray in the hall of Lidepa.

Hang silver-gray film or silver-gray film strips (10 15 cm wide) in the field, with 75 kg of film per hectare or with film strips 225 kg to repel aphids. Use sweet and sour basins or frequency-vibration insecticidal lamps.

Set up sweet and sour liquid basins or frequency vibration insecticidal lamps in the field to trap and kill pests such as tigers and beetles, reduce the degree of insect pests and reduce wounds, and prepare coarse to reduce the way of disease infection.