Comprehensive Control Techniques of Main Pests in Cotton
Ben Yimin
First, cotton aphid prevention and control technology
1, smearing techniques: seedling period cotton seedlings sporadic spot selection of fast Kele or 40% omethoate, according to 1:5 - 10 times more water into the liquid, smear on the cotton stem red and green at the side, Apply a length of 2-5 cm and do not need a ring.
2. Dim Sum Technology: Use crocodil or omethoate, dubbed 1 to 200 times liquid, 2-3 drops of liquid drug on each cotton seedling growth point. Method: Remove the spinner head of the backpack-type hand pressure sprayer, wrap 3 layers with gauze, and unscrew the switch by one third after the medicine barrel is added with liquid medicine.
When the cotton vine damages the leaf rolling rate by 5%, it is controlled by the stem-stalking method and the drop-center method.
3, bacteria aseptic, urine, wash "triple play": the bacteria sterile, urea, detergent (neutral), water prepared by the ratio of 0.1:1:100, stir well after spraying. The cotton leaves must be sprayed evenly and thoroughly on both sides. Treatment of cotton seedling disease and anthelmintic, ovicidal effect.
4, the pharmaceutical pick governance: cotton aphid hazards heavier, can choose to fast crack 1500 times liquid or 40% omethoate spray, to prevent the spraying of pesticides in large areas to protect natural enemies, is strictly prohibited abuse, indiscriminate use of pesticides, forbidden to spray Methamidophos, carbofuran, 3911 and other highly toxic pesticides, pay attention to the safe use of drugs to prevent human and animal poisoning.
5. Yellow plate inducement: Using the yellowishness of cotton aphids, yellow plates were trapped to trap the winged pupae on the outside of the cotton field. Method: Use a 5030 cm yellow cardboard jacket with transparent plastic and butter the surface.
6. Concealed application of pesticides: Heavily growing cotton fields occur in cottonseed meal. Before pouring the head water, furrow applies 15% poisonous racer ear 400-500ml/mu mixed soil 30-60 kilograms. It is required that the ditch be 10-15 cm away from the cotton plant, and the ditch depth should be 7-10 cm. After the application, the soil should be covered with water.
Second, cotton bollworm control technology
1, planting corn traps, centralized prevention and treatment: beat the heart every morning to kill moths or in carp mouth carbofuran or phoxim, monocrotophos spray control.
2. Poplar willow sticks to attract moths: 10-15 shoots of poplar branches with a length of about 65-70 cm are used. After the wilt is bunched, they are bunched together (tight under the pine), and the lower part is tied down on the wooden strip. In the soil, between the cotton rows, the height exceeds 15-30 centimeters of the cotton plant, inserts 6-8 per acre, packs the moth every day at dawn, or sprays the poplar with a sprayer (with water), shakes off the moth. wipe out. Every 5 to 10 days exchange once.
3. Sex attractant moths: One per acre of cotton fields. Method: The cotton bollworm sex attractant is put on with fine iron wire, hang on the water basin, the lure is 1-1.5 centimeters away from the water surface (more than 200 meters is invalid), use the old urea bag to stand up to the field, the water basin is put Soil urea bags, 20-30 cm above the cotton plant (with the growth of cotton plants, the bags continue to increase the soil along with it). During the day, the water basin can be covered with hard paper shells to reduce the evaporation of water and enhance the quality of sex attractants. When water volume decreases, water is added to the water level in the evening. Change the lure every 10-15 days.
Sex attractant trapping and killing prevention, to achieve group governance, grouped and connected large area applications, in order to receive good results.
4, black light trapping, physical insecticide. In the cotton field, black light traps are installed to kill adult insects.
5. Chemical control: The main pesticides are poisonous sel, phoxim, endosulfan, and pyrethroids. 100 cases of cotton aphids that reach 20 eggs or have a rate of 5% or more of the strains are treated with peach. When the egg aphid larvae hatched to the third instar larvae before the best period of chemical control, color back-support machine sprayer, and strive to get through evenly through the cotton plant.
(1) 15% poisonous ear 1000 times liquid foliar spray, 50% phoxim EC 50 ml/mu, add water 50 kg, spray at 8-9 pm in the evening.
(2) 20% Coke 30--50 ml/mu, 35% endosulfan (Saidan) EC, dosage 100-130 ml/mu, watered 45-60 kg spray.
(3) 2.5% Kung Fu, such as pyrethroid pesticides, 50-60 ml / mu, 45-60 kg of water spray. Heavy cotton fields occur in cotton leafhoppers, and the use of Kung-fu and other ester pesticides is prohibited.
The above-mentioned several pesticides are used alternately to prevent the resistance of Helicoverpa armigera.
6, to strengthen field management: timely control, prevent cotton plant leggy, increase phosphorus, potash fertilizer, control the cotton field irrigation late, can reduce the spawning of cotton bollworm. Early pruning topping, laying the top, took out deep outside the field, can take away the source of insects, reduce the amount of cotton bollworm. III. Prevention and control of cotton leafhopper (Red spider)
Harmful cotton fields use Chunyu No. 1 + Quick Krypton, Chunyu No. 1 + Broomfly Net, Chunyu No. 1 + triclosan and other special acaricides 1500-2000 times liquid, spot film picking or field control, which can be controlled Spreading harm, at the same time can receive the elimination of aphid toxins, increase chlorophyll content, enhance the magical effects of photosynthesis. Five days after the drug, the control effect was checked, and the individual was supplemented on one side. (Senior agronomist: Ben Yimin)
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