1. The green Cameron
Weeds in garlic after 3 leaf stage, 2 ~ 3 leaf stage, with 25% green per acre Cameron wettable powder spray 300 grams, can control the cow chickweed, such as the mai niang annual gramineous weeds and broad-leaved weeds, but bad for cleavers effect (you can add some 24% oxygen fluorine grass ether was 20 g/b mu, the temperature is lower than 5 ℃ can't use), a special effect on chickweed, has effect on no weeds also unearthed, but bad for gramineous weeds effect.Green Cameron efficacy period is long, the effect is good, but widespread application security is bad, have an effect on garlic production when high doses, frequently used for the rice, and b oxygen fluorine reducing grass ethers (sudden) mixture can enhance security.
2. Isopropyl lung
Isopropyl lung to replace the type of selective herbicide transmitting, drugs mainly through the roots of the plant absorption, within the intraductal conduct with water up to the leaves, inhibit the photosynthesis of green plants.Phytotoxicity of weed in tip and margin back green, yellow, eventually die.By 25% per 300 g isopropyl long wettable powder spray, can effectively control the wheat niang, chickweed and various annual gramineous weeds and broad-leaved weeds.
Note: (1) before and after applying pesticide, keep the soil moist, to develop ideal effect.Soil drought must increase the dose.(2) should be spray evenly, if uneven, applying pesticide crops there will be a slight phytotoxicity.
3. A grass amine
A grass amine alias, Macao lasso lasso, alachlor, monsanto company in the United States production of a selective herbicide before bud.Its action principle is a grass amine is absorbed by the bud sheath weeds, absorbed a grass amine can inhibit the activity of protein, protein structure, leads to the formation of a bud, root can't.A grass amine to control weed, digitaria, grass, green bristlegrass, autumn crickets tares, arm grass, purslane, amaranth, whorl millet grass, quinoa, smartweed annual gramineous weeds and broad-leaved weeds control effect is good, to the dodder weed also to have certain control effect.A grass amine dosage of emulsifiable solution of 48% per 150 ~ 300 ml of water for 30 ~ 35 kg, evenly spray.
Note: a water soluble grass amine is poor, in case of dry weather and no irrigation condition, before planting mix method should be adopted, otherwise the effect is difficult to play.
4. Acetochlor
Acetochlor alias grain resistance, is monsanto company in 1971 by the United States before the successful development of a selective bud herbicide, at present acetochlor is not only the one of the largest herbicide use, is also one of the largest herbicide use in the world.The action principle of acetochlor can sheets monocotyledon coleoptile or dicotyledonous plants absorb, the hypocotyl by blocking the protein synthesis, inhibit the growth of cells, suppressing or even kill weeds.Acetochlor of digitaria, green bristlegrass, eleusine indica, weed, thousands of gold, the mai niang, wild oats, Kentucky bluegrass, grass, teff annual gramineous weeds have special effects, such as the chenopodiaceae, amaranthaceae, polygonaceae, duck plantar grass, cattle chickweed, dodder, broad-leaved weeds also to have certain control effect, but the effect than gramineous weeds is poor, the perennial weeds is invalid.Acetochlor its dosage is 90% oil per mu 80 ~ 100 ml of water 20 ~ 25 kg, spray evenly on the soil surface.50% acetochlor in garlic field dosage should not exceed 200 milliliters per acre, otherwise it will occur the recessive adr.
Note: (1) encounter much rain, continuous low temperature, and for the silty loam breeds the adr;(2) after the drug was used under high temperature, high humidity or continuous low temperature and humidity are prone to the adr;(3) a yellowing shrivel, blade, 10 ~ 15 days later can grow back to normal.
5. Isopropyl amine a grass
Isopropyl alias methyl chloride noxious grass amine amine, all, is a kind of selective herbicide before bud.Its action principle is: isopropyl grass amine is absorbed by the germ, conduction upwards, inhibit the protein synthesis of germinating seed, the second inhibition of choline infiltration of phospholipids, interfere with the lecithin formation, restrain the growth of the germ and the root.Isopropyl armour of barnyard grass grass amine, digitaria, green bristlegrass, teff annual weed and purslane, amaranth and quinoa broadleaf weeds have control function, but for gramineous weeds is far better than to the effect of broad-leaved weeds, the main reason for gramineous weeds germ's capacity to absorb isopropyl methyl amine grass than broadleaf weeds.Its dosage is 72% ec 100 ~ 150 ml of water per acre 35 ~ 40 kg, spray evenly on the soil surface.
Note: if the broad-leaved weeds in the field is more, isopropyl methyl grass amine can be blended with other herbicides, to expand to kill the grass.
