How to implement the control of underground lawn pests

There are many kinds of underground pests that harm sweet potato, mainly crickets, mole crickets, ground tigers, grubs, and needleworms, which are all omnivorous and can harm many crops at the same time.

The main prevention and control methods are: agricultural control: intensive farming, weed elimination, irrigation, crop rotation; Physical and artificial control:

Artificial trapping, light trapping, sugar liquid trapping, grass trapping; Biological control: Bacillus lactis is cultivated and inoculated in the soil to make the grub susceptible to death; Chemical control: It can be combined with the prevention and control of sweet potato stem nematode disease to soak seedlings with pesticides, mix poisonous soil, trap poison bait, and spray pesticides.

In particular, it is recommended to take agricultural measures to prevent underground pests, and chemical control must meet the national requirements for the safe production of agricultural products.

First of all, do a good job in cultivation management, especially irrigation with a small amount and a large amount, to promote the growth of lawns. For some underground pests, eating some roots or underground stems is not a big problem. If the number of pests is large, the density of the insect population reaches the control standard, and even the appearance of empty shells (baldness), chemical control should be carried out.

Commonly used pesticides include trichlorfon, dichlorvos, marathon (malathion), insecticide (acemethamidophos), dimethoate, phosphine, etc. The application method can be poured or sprinkled with poisonous soil. After sprinkling poisonous soil, it is advisable to irrigate 1 time.

If the surface is compacted, it is advisable to comb the grass first, punch and then apply pesticides, which is conducive to pesticides into the soil.

1. Chemical control

1. Seed treatment: the use of liquid agent seed dressing, the method is simple, is an effective way to protect seeds and seedlings from underground pests.

2. Soil treatment: use 50% phosphine emulsifiable concentrate or 25% phosphine microcapsule sustained-release agent, mix fine soil or fine sand with kilograms of water, turn the ground or shallow hoe after sprinkling, combine with irrigation for better effect, and also choose 75% phosphine granules.

3. Spraying pesticides: spray on the ground with 1000 times of 50% phoxanthion EC, 1000 times of deltamethrin, 90% trichlorfon kg plus an appropriate amount of water or 50% dichlorvos kg plus an appropriate amount of water. Spray 2 times with trichlorfon, 3 kg per mu each time, and have a good control effect on ground tigers.

1 gram of aluminum phosphide per square meter has a strong poisoning effect on root bugs.

4. Poisonous bait and poisonous weeds: use 90% crystal trichlorfon kilograms or trichlorfon powder, add kilograms of water, and spray on 50 kilograms of crushed and fried cottonseed cake or oil residue; Use 50 grams of 50% phoxanthion emulsifiable concentrate, mix 5 kg of cottonseed cake or replace with fresh crushed grass, 30-35 kg of grass per kilogram of trichlorfon crystals. Sprinkle the mixed poisonous bait or poisonous weed near the rhizosphere of the seedlings in the evening, and pile a small pile at a certain distance, with a dosage of 15-20 kg per mu.

2. Physical prevention and control

Mainly by using the phototaxis of mole crickets and golden tortoise shells, using black light to trap and kill, setting up a black light every 40-50 meters, and using black and green single-tube double-light booby trapping effect is more obvious.

3. Agricultural prevention and control

For the lawn in arid areas or drought years, proper irrigation can inhibit underground pests, and at the same time of irrigation, 50% phosphine or 50% malathion 1000-1500 times liquid can effectively control all kinds of underground pests.

The turfgrass experimental area occupies a small area, and most of the turfgrass pests affected by the surrounding plots are migrated from the surrounding plots, and the surrounding plots should be taken into account when controlling. When administering the drug, it is necessary to ensure that the operation and dosage of each cell are the same, so as not to affect the evaluation of insect resistance.

Underground pests are the great enemies of crops, eating seeds, young shoots, rhizomes, causing a lack of seedlings, and even destroying seeds, resulting in reduced crop yields. Common underground pests include grubs (beetles), needleworms (kowtow insects), mole crickets (lala crickets), and ground tigers (dewormers), which have different symptoms of damage to crops and should be diagnosed, identified and controlled.

1. Symptom diagnosis.

The larvae of the grub beetle feed on the young roots and stems of crops, and often bite or bite off the roots, and the damage is characterized by the fact that the fracture is relatively neat, so that the seedlings wither and die, and soybeans, sugar beets and sorghum are more seriously damaged.

2) Needleworm is the larvae of the knocking insect, harming wheat, corn, sorghum, potato, etc., biting seeds, germs, rhizomes, and the characteristic of the harm is that the young rhizomes are eaten into small holes, resulting in dead seedlings, lack of seedlings or causing tuber rot.

3) Mole crickets bite the seeds that have just been sown or germinated seeds in the ground, and feed on tender stems and roots, the hazard is characterized by biting into a messy hemp, and at the same time the mole crickets are active on the surface, forming a tunnel, separating the seedling roots from the soil, causing the seedlings to wither and die, and the millet is more seriously damaged.

4) ground tiger larvae are very miscellaneous, harmful to soybeans, corn, vegetables and other crops, lurking in the soil during the day, unearthed at night, the damage is characterized by biting off the base of the stem, often causing serious lack of seedlings and broken strips of crops, and even destroying seeds.

Second, the prevention and control technology in the areas where grubs and needleworms are serious, fertilizer mixing and stuffing seeds should be the mainstay, and in areas where mole crickets are serious, poisonous bait should be the mainstay; In areas where tigers occur severely, a combination of deep turning to kill eggs, weeding and insecticide and pesticide control is used.

1) Grub and needleworm control technology.

1) Mix fertilizer, mix phosphorus granules with 5 methyl phosphorus, and evenly mix the kilograms per mu into the seed fertilizer for sowing.

2) Seed dressing, with soybean seed coating agent seed ratio of 1:75 or 35 methylthiocyclophos according to the seed amount, and stuffed seeds.

3) Irrigate the roots, after the larvae are found to be harmed, irrigate the roots with 1000 times of 90 trichlorfon or 1000 1500 times of 75 phoxanthion, 100 grams per hole.

2) Mole cricket control technology.

l) Poisonous bait, with 1 kg of 40 dimethoate emulsifiable concentrate or 90 trichlorfon, an appropriate amount of water, mixed with 100 kg of fried wheat bran or soybean cake and other bait, a little stuffy, sprinkled with mole crickets tunnel opening, 1 kg per mu.

2) Trapping and extermination, using the phototaxis of mole crickets, which can be trapped; Dig a 30 40 cm square pit on the ground, pile a little fresh horse manure in the pit, and mix trichlorfon powder according to 1 10 of the amount of horse manure for booby-trapping.

3) Ground tiger control technology.

1) Deep turning after autumn to kill eggs, weeding and insect control before emergence.

2) Poison bait trapping, use 80 kilograms of trichlorfon wettable powder and 5 kilograms of fried fragrant bean cakes, mix an appropriate amount of water into poisonous bait, and sprinkle it on the damaged field in the evening, with 1 kg per mu.

3) Spraying, with 50 phosphine emulsifiable concentrate 1000 times, sprayed at dusk when the tiger is unearthed.

In summer, due to the temperature, diseases and insect infestations are at their peak on the lawn. Common diseases are rust, powdery mildew, etc. These diseases have a great impact on the growth of the lawn, which can weaken the growth of the lawn and cause a large area of the lawn to die.

Therefore, it is necessary to do a good job in the prevention and prediction of the disease in a timely manner, and prevent and treat it as soon as possible. Generally, 1000-1500 times the liquid is used to prevent the rainy season before yesterday, and the interval is 15-20 times. Common insect pests are grubs, mole crickets, ground tigers, armyworms, etc., most of these pests can directly cause lawn death, the underground pests are generally used to sprinkle happy forest to hit green health to prevent and control, the dosage per mu is generally 500-1000 grams, depending on the increase or decrease of the amount of insects, after rain or when there are dew on the lawn.

1. Strengthen cultivation management and improve turf resistance. Scientific pruning, enhanced water and fertilizer management, and cultivation of robust lawns to improve the stress resistance of turfgrass.

2. Choose disease-resistant varieties when planting lawns, or choose several lawns for mixed sowing, so as to improve the resistance of lawns.

3. Pharmaceutical prevention and control: before the occurrence of the disease or in the early stage, it is recommended to use Jingbai or Tianjun for spray prevention and control.