Closed soil weeding method for corn field
The corn main weed crabgrass, Goosegrass, Setaria viridis, Amaranthus retroflexus, Paris and copperleaf, Calystegia monocotyledonous and dicotyledonous weeds. The most common crabgrass, goosegrass.
because the weeds in maize rapid growth, growth, and competition for water, fertilizer, corn fight for space, great harm on corn seedling growth, seedling caused by thin, weak seedling, yield reached 10— 30%, the grid method of soil consolidation the following is a list of closed weeding, steps out for users reference.
The soil
first, the correct selection of herbicides is appropriate:
can use 40% suspension emulsion or 48% herbicide, with new, safe, efficient, low toxicity, low residue and other characteristics, the effect of weeding is better.
The soil
two, the application time:
usually before maize seeding or before early emergence of maize. During this period, weeds are in the period of emergence, and they are easy to touch and die. When the weeds emerge, the effect of spraying will not be ideal.
The soil
three, dosage:
commonly used dose, mu 40%, 165 grams, or 48%, 150 ml of suspension. But the mechanical harvesting of high stubble plots, should be appropriate to increase the amount of 40% acres with 200 grams or 48% suspoemulsion weeding suspoemulsion Wei 175— 200 ml. No light stubble, with wheat ash and herbicide control after combustion reaction, reduce the effect.
The soil
four, the application of skills:
when applying, must be in watering or rainfall after the use of field humidity, it is best to immediately after the corn irrigation, irrigation 2— 3 days can be sprayed. The drug should be fully shaken evenly, and then calculated according to the use of the amount of medicine, and accurate measurement. First add a small amount of water, dilute the drug into mother liquor, then press the amount of water per mu 40&mdash, 50 kg, stir evenly, spray evenly on the surface of the soil. When spraying in order not to destroy the membrane, take a walk backwards, while blowing the way back.
The soil
five, note:
1; it is best to use the sprayer, the amount of water to be sufficient, spray evenly, do not re spray or leakage spray, avoid strong wind spray.
; in the corn just outcrop and corn farming, sand soil should not be used, so as not to cause phytotoxicity.
3, after spraying the surface to form a layer of film, don't destroy the membrane cultivator.
4, spraying in the morning before 10 or after 4 p.m. as well, to avoid or destroy the volatile liquid membrane.
; 24 hours after pesticide application, if heavy rain should be timely spray.
6; for Cyperus (sedge), more plots should be selected at the end of the use of two, four chlorine directional spray control.
7; after spraying, rinse the spray apparatus with alkaline water in time, and avoid other crops.