The return of wheat to the jointing stage rises with temperature, and pests and diseases begin to spread. Therefore, corresponding control measures should be taken according to the specific conditions of the occurrence of pests and weeds.
The major pests and diseases occurring during this period include wheat full-blown disease, sheath blight, root rot, scrub plexus disease, yellow dwarf, swat fly, wheat spider, wheat leaf bee, leaf miner, golden leafworm, cockroach, Leafhopper, Laodelphax striatellus, SVW, amaranth, wild wheat and a variety of weeds.
I. Irrigation with roots to prevent soil-borne diseases Diseases with full-blown wheat or sheath blight, root rot disease, and soil treatment at the seeding stage in the previous year, or the rate of sheath blight and root rot disease reached 15% When returning to the green stage, use 15% triadimefon 150-200g, 50% carbendazim WP 50g or 12.5% ​​konjac WP 50g per mu, and 50-70 kg water, and sprinkler irrigation Wheat stem base. Severe disease fields will be controlled again every 7-10 days.
II. Underground Pest Control When the hazard rate of ground pests such as gold worms or earthworms reaches more than 3%, use 50% phoxim EC to 240-300 ml per mu and pour into the soil with water; or use 48% chlorpyrifos EC 1500 times Or 90% crystal trichlorfon 800 times to irrigate the root; 50% phoxim EC 200-240 ml to 10 times liquid and then add fine soil 24-30 kilograms to make the drug soil along the ridge, then shallow mix earth.
When wheat spiders reach 200 rows per 33 centimeters or 30 leaves per square meter, they can be treated with 1.8% avermectin EC 3000 times and 40% dimethoate 1500-2000 times. Treat poisoning pests, swedes, and leaf miners.
3. Chemical Weeding of Wheat Fields Above 30 Weeds per Square Meter before Chemical Weeding and Jointing. In wheat fields dominated by broad-leaf weeds such as sowing wormwood and leeks, 40% of fast-killing water dispersible granules per gram, 2 grams of 10% tribenursulfuron-WP, and 30-45 kg of water are sprayed. No herbicide should be used after jointing in order to prevent phytotoxicity, weed occurrence, and manual removal.
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