In recent years, the root-knot nematodes in protected areas have become more and more serious, and the vegetables in protected areas have often been severely reduced or even eliminated, and they must be taken seriously. However, if nematodes are difficult to treat, good results must be taken and comprehensive measures must be taken.
Non-disease prevention
It is forbidden to bring pests and seedlings into the production shed; to strictly control the spread of human communication and production tools, to set up a quicklime pool at the intersection of the production park, and a quicklime pool for each greenhouse entrance. Before entering the shanty area and the shed, the person removes the soil on the soles of the feet, and steps on the quicklime to disinfect and disinfect the insects to prevent the worm body from entering the sole. Since the production tools often contain the soil of pests and insects, it is better to have special tools for each production shed, or to scrape the dirt and disinfect the insects with quicklime or liquid during use; timely clean up the field sicknesses and destroy them in time. Avoid the flow of rainwater from the ward to the no-disease area.
Ward prevention and control
Agricultural control: After the harvest, the field is completely cleared of the diseased plants, concentrated burned or buried deeply, and can also be used for manure, remember to be fully decomposed; use no soil to raise seedlings, remove seedlings or remove “root nodules†when transplanting; Most of the knot nematodes are active in the 0-25 cm soil, turn the topsoil to 25 cm or less, apply adequately decomposed organic fertilizers, microbial residues, biogas residue, biogas slurry, etc.; choose high-knot nematode resistant rootstocks for grafting; take rice and onions, Garlic vegetable rotation; soilless cultivation.
Using high-temperature insect repellent: Using the shelter leisure season, in the hottest days from the end of June to the end of July, lime nitrogen is applied in the shed (the amount of mu is 80 kg. If it is a powder, fine soil can be added to ensure Scatter), and then apply a straw such as wheat straw or corn (600-1000 kg) into a small section, or apply 250-300 kg of chicken manure per acre, and add wheat straw or corn (600-1000 kg), plus Ammonium bicarbonate 60 kg, rotary tillage depth of 18 to 22 cm, plowing twice, followed by ridging (30 cm ridge height, ridge width 50 to 60 cm, 40 to 50 cm wide furrow width), and then use transparent film or no The damaged old membrane completely seals the surface of the soil to reduce the loss of water, increase the temperature, and re-irrigation. The film must be tightly covered, and the water must be filled to improve the control effect. The protected area is then completely closed. If the temperature of 20 centimeters is at 40°C (measured at 10 o'clock in the morning and 10 o'clock in the evening), keep it for 7 days. However, it cannot reach such a high temperature, so it must be sealed for more than 25 days.
Chemical control: Mix the seeds with the amount of nematode gram or grammide and mix them evenly, stack them for 2 to 3 hours, and dry them after sowing. Can also be used nematode bike 200 grams per acre and 5 kg of fine soil mix evenly after adding water into a thin paste, or grams of line Po diluted 150 to 200 times, when transplanting seedling roots use. Can also be used 200 grams of nematode per gram with fine soil, wheat bran, rice bran, etc., when transplanting points.
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