The hazard and prevention of the underground pests of sunflowers

The underground pests of the sunflowers mainly include the worms, grubs, tigeres, and golden needles, which are one of the important measures to ensure the growth of the sunflowers.

The underground pests:

A, mole

The custom plowed dog, the lara, the scrabbled dog, the northeast is called the ground mantis. It is commonly found in the ground, in the night and early in the morning under the surface of the earth, which can be drilled between 15 and 20 centimeters deep. 2 ~ 3 years, 1 ~ 16 meters deep in the earth. The next year the temperature rises, which is the beginning of the activity, and the 6th ~ July is the spawning period, which is in the light salt alkali area to the sun, the high, the dry, close to the ground of the land ridge. Mole is a polyphagous underground pests, with its adult and larva killed just sow seeds in the soil (especially just germinated seeds), young root and tender bine, crops were killed is occurring, the ground water, due to lack of seedlings DuanLong even destroyed.

Second, the grubs

Grubs, from one to two years of age, larvae and adult worms in the middle of the winter, are known as dung beetles, which are hidden in the soil during the day, and eat and eat at 8-9 in the evening. Grubs have both pseudodeath and negative phototropism, and they have a tendency towards uncooked manure. The larvae, grubs, are always underground, close to the temperature and humidity of the soil. When 10 cm Mark Twain up to 5 ℃ began to rise the soil surface, 13-18 ℃ activity peak, 23 ℃ above is moving in deep soil, Mark Twain to fall down to the scope of its activities is appropriate, then move to the upper layer soil. The soil moisture activity is strengthened, especially in continuous rain, spring, autumn in the surface layer activities, and in the summer more early in the morning and at night to the surface layer. The seeds, roots, tubers and seedlings of the newly planted seeds often cause the sunflowers to break.

Third, cutworms

The tiger is a small tiger, a yellow tiger, and a white tiger. The seedlings of the sunflower root are usually eaten by the larvae. Tigers in the northeast, Inner Mongolia, etc. Are two to three generations a year. Adults are most active at 10 p.m. There is a habit of tracing out the seedlings. Adult worms lay eggs on the weeds, 1 ~ 2 larvae of the larvae, 3 age larvae spread, and at night, they break down the tender stem. The first generation of larvae in late may and early June, the second generation of larvae in the middle of July.

Fourth, the wireworm

It is the larva of the head worm, which usually takes three to five years to complete a generation, and each of the generations is in the ground of the underground, and the wintering depth is about 20 to 85 centimeters. The winter adult began to move in early march, and in early April it was a prime event. The adult is hiding in the fields of wheat fields or fields of weed and soil, and the eggs are grown from 3 to 7 centimeters in the middle of the earth. Feeding the sowing seeds in the soil, eruption of germ, the roots of crops and plants, the crops withered to death, due to lack of seedlings DuanLong, and even destroyed the whole field.

Method of prevention and cure:

First, agricultural control

During the winter, you can kill and freeze some of the winter pests.

Use organic fertilizers that are fully decomposed, which can reduce the amount of eggs produced by the worm and provide food for grubs, tigers, etc., thereby reducing the risk of seedling. The use of uncooked organic fertilizers should also be prevented to prevent the recruitment of adult insects to lay eggs.

Remove weeds, remove weeds, strengthen field management and eliminate spawning hosts.

Second, soil treatment

1, the use of 50% phoxim oil per mu 200 ~ 250 grams, add water 10 times to spray on 25 ~ 30 kilograms of fine soil mix into poison soil, or with 2% methyl isopropyl willow 2 ~ 3 kg per mu of phosphor powder with fine soil made 25 ~ 30 kg poison soil, along the ridge banding, then shallow hoe, or will the poison soil removal in the trench or ground, then ploughing up or mixed in the manure application;

3 grams of budweiser granules 3 to 5kg for each acre, in sowing trenches, to prevent underground pests.

Third, the potion mix

In order to prevent multiple underground pests, the rate of germination is not affected.

2, use 50% methyl phosphate emulsion 0.2 ~ 0.3 kg mix 100 kg, and be bored for 5 ~ 10 hours, seeded after drying,

Four, the bait is ensnared

1, with trichlorfon 80% soluble powder 100-125 grams per acre, dissolve trichlorphon with a few water first, then saute with 4 to 5 kg of grain made poison bait, in the evening broadcast in crop root soil surface traps in insect pests.

2, use 5 kg of grain, stir-fry after adding suitable amount of water and 40% methyl isopropyl liu was 50 grams, stir in the field and in the evening after 2 ~ 3 kg per mu, luring effect can reach more than 90%.

Mix well with 80% of the enemy, 3.75 kg for each hectare, and 750kg of chopped fresh grass in the evening.

Five, the potion

To find the damage of the larvae, use 90 percent of the enemy 100 or 75 percent of the solution of 1, 000 to 1, 1, 1, 1, 100 grams.

During the adult stage of adult life, 90 percent of the enemy 100 and 50 percent of the long-term phosphorus 1000.

To kill 1 ~ 2 years old tiger larvae, with 80 percent of the enemy or 50 percent of the oil, 3 ~ 3.75 kg per hectare, and 600 kg spray.

Six, physical control

In conditional areas, black lights can be set up to trap grubs and tigers.