1. Duckweed
(1), oxalox: in the 4-6 leaf stage of corn used 48% bentazone AS100-200ml / acre, stem and leaf treatment.
(2), fluproppiroxyacetic acid + bentazone.
(3), flupiroxine + oxadiazon.
(4), Harry (70.5% 2 methyl oxazolone WDG): 60 grams per mu after the 5 leaf stage of the corn field.
2, Tianxuanhua: optional agents are: bentazone, flupiroximide, 2,4-diisooctyl ester, 2 methyl 4-chloro, glyphosate, glufosinate.
3, chicory, thorns, large thorns (big cockroaches): optional agents are: chlorpyrifos, 2,4-diisooctyl ester, flufensulfuron.
4, Xiang Fuzi:
(1), Dimethyltetrachloride: It can be used with 56% sodium dimethyltetrachloride sodium SP 75-100g/mu, 30kg/mu of water, and the leaves and leaves of the fragrant aconite. When applying the medicine, it should be sprayed on the stems and leaves of the fragrant aconite, and sprayed on the corn as little as possible. When applying the drug, it should be applied strictly in the application period. It should be in the 5-7 leaf stage of corn, and the best in 5-6 leaf stage. It should not be too early or too late, otherwise it is prone to phytotoxicity; the application temperature is too high (above 32°C) ), it is also susceptible to phytotoxicity to corn.
(2), 2,4-butyl butyl ester: 3-5 days after sowing of corn, use 72% 2,4-butyl butyl EC50-100 ml per acre before emergence, and evenly spray the soil surface to about 35 kg of water. And weeds have been unearthed. It can also be used in the 4-5 leaf stage after corn emergence, with 72% 2,4-butyl butyl EC40-65 ml per acre, about 35 kg of water, spray on weed stems and leaves.
(3), oxadiazon: spray treatment in corn 3-5 leaf stage, with 50% oxadiazon DF5.3-8g / acre, 30 kg water, can prevent mother-in-law, ramie, anti-twig, cockroach , sedge, such as sphaerotheca, pig's chop, nightshade, white mustard, wild sesame, red heart stalk and other broad-leaved weeds and fragrant aconite. Unlike hormonal cornfield herbicides such as dimethyltetrachloro and chlorofluoxyacetic acid, oxadiazon has a relatively small effect on corn rooting. However, the high temperature used on corn is prone to phytotoxicity and has a certain impact on the growth of corn. When applying the medicine, it must be before 8 o'clock in the morning, after 4 o'clock in the afternoon, and the temperature should not exceed 30 °C.
(4), 75% chlorpyrifossulfonate WDG: in the 3-5 leaf stage of corn seedlings, 3-5 leaf stage of weeds, the best period 4-5 leaf stage application. The dosage of the preparation is 75% WDG 45-60 g / ha, and water is 15-30 liters. It has high herbicidal activity against some common broadleaf weeds and sedge weeds such as fragrant aconite in corn fields, and is safe for most corn varieties. As a cornfield herbicide should be used together with the antidote MON13900.
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