Dipyridylmethairon can remove wild wheatgrass

Cheng Xuezhen, Binhai County, Chen Xueren said on November 15 that there was a red stem in the wheat fields last year. The leaves were cracked like palms and the top of the fruit was as long as the broad-leaved weeds of the beak. When weeds were in the 7~8 leaf stage With 10% tribenuron-methyl per acre 30 grams of water spray can not control. This year, there are 3 leaves and 1 heart in wheat, and the broad-leaved weeds in the field are in the 4 to 5 leaf stage. He asked what kind of name this weed is called and how to prevent it.

Recognition features

The red stem in the wheat field, the leaves are cracked like palms, and the broad-leaved weeds at the top of the fruit resemble the beak. It is likely to be wild geranium. Wild barnyardgrass is perennial herb, stem erect or obliquely stretched, plant height 20 to 50 cm, lower part slightly stalked, densely densely puberulous; leaves opposite, round kidney shaped, 2.5 to 6 cm long, 4 to 8 cm wide, 5 ~7 deep, with 3 to 5 cracks per lobe, small lobes apically pointed, pilose on both surfaces, dorsal lobe veins bulging; flowers paired to leaf axils, talking red, pods with a long beak at the top, dehiscing at maturity, pods The Ministry curls up and down, the seeds are oblong, dark brown, textured or nearly smooth. Flowering from April to May and fruiting from June to July.

Control period

Wild barnyardgrass is one of the major broad-leaved weeds in rice and barley in our province in recent years. In some fields, it has become a dominant species of broad-leaved weeds. It is understood that wild barnyardgrass has a large amount of grass before winter, and the weeds before winter are in the “green stem period” before lignification, and it is easier to control, to the weed “red stem stage”, the waxy surface of the plant is more, woody The degree of high degree of decline in efficacy. In the early November and early March, early winter and early spring, the temperature is stable above 5°C, which is the key period for controlling wild eelgrass. Appropriate dosage should be added when using drugs.

Control agent

Tribenuron is a sulfonylurea graft-type postemergence selective herbicide. Dicotyledon weeds, leeks, wheatgrass, Maijiagong, ion grass, swine fever, minced rice dumplings, ragweed grass, curly stems, etc., are sensitive to the drug. Zeqing and Veronica are moderately sensitive. . The drug had poor control effect on the flowers, such as wild convolvulus, communis communis, iron leeks, lotus root, spurs, etc., and its inhibitory effect increased with increasing dose. 10 to 14 days after application, we can see that the weeds are severely inhibited, the heart leaves gradually chlorosis and necrosis, the leaves chlorosis, the whole plant withered after 30 days of application, and the growth of undead plants was inhibited. The effect was relatively slow. Due to the long-term use of tribenuron-methyl, and the resistance to tribenuron, such as weevil, increased, the populations of broad-leaved weeds, such as large-vegetative crops, broad-leaved weeds, amaranth, and wild barnyardgrass, which have strong resistance to insecticides, increased. In the fields with a large number of weeds, the control effect of using tribenuron-methyl was significantly decreased, and the amount of medication used increased the control effect, but it was prone to produce residual phytotoxicity on broad-leaved crops.

Wild wheatgrass occurs in a large amount of wheat, and in the "green stem period" of weeds, vetoxamone and its compounding agent are used. Sulfosugamide and other drugs have a good control effect. It can be used in the "red stem period" dosage. Inhibit weed growth.

According to Liu Jiahua and others from Yangtan Agricultural Technology Station in Guangde County, Anhui Province, the use of Bayer CropScience (China) Co. Amidospirone water dispersible granules 12 grams, 15 grams, 20 grams, have better control effect on wild Geranium. The medication time was February 22, with 1 to 3 tillers during the treatment, and the growth was good without freezing injury; the wild elm seedlings were 6 to 8 leaves, red stems, 14 per square meter, and 2 to 3 leaves. The density is high and the quantity is not counted. Test results: Each mus of the use of 6.25% adipic acid iodine water dispersible granules 12 to 20 grams, the control effect of wild Geranium strains in more than 86.47%, the effect of fresh weight in more than 92.9%; where per acre The effect of treatment with 20 g of the drug was 97.74%, and the effect of fresh weight was 97.9%. The effect was very satisfactory. The remnant wild barnyardgrass plants are dwarfed, and their growth is significantly inhibited. The leaves of the heart are chicken-like. The leaves of the leaves on the sides of the leaves are yellowish, and the veins are green. They may be mosaic virus diseases, and the old leaves are basically normal. The wheat in the plots grew normally and there were no symptoms of phytotoxicity. The test results showed that 6.25% amidospiramide water dispersible granules are safe for wheat growth and have a good effect on wild barnyardgrass and can be used to control wild weeds and other broad-leaved weeds in wheat fields. The control of broad-leaved weeds dominated by wild barnyardgrass was 12 to 15 grams per mu for weeds and 20 grams per mu for spring weeds.

Dehydrated Celery

Dehydrated Celery,Ad Celery Cross Cut,Dehydrated Celery Canner Cut,Air-Dried Celery Stem

Xinghua Jiahe Foods Co., Ltd. , https://www.jiahefoods.com