When using herbicides influence of temperature on the efficacy of

When using herbicides influence of temperature on efficacy , generally only postpone or advance the efficacy of play time . If the temperature is low , due to the physiological activity of weeds is also relatively slow , and thus the conductivity also slow the absorption of herbicides , such as winter or spring, and thus the efficacy of performance when backpack weed sprayers spraying time , and compared to the hot summer months , generally extending 5 10 days or even longer. This is why the temperature is low more than 10 days after the use of herbicides , the weeds are not symptoms of poisoning. Currently on the influence of temperature on herbicide roughly as follows: the temperature is below 10 degrees Celsius, most of the herbicide efficacy is difficult to play, as the temperature gradually increased gradually shown efficacy, if prolonged continuous low temperature , herbicides lose part of the effect will be weathered ; 10 degrees Celsius, most of the herbicide can show herbicidal effect , but higher than under normal circumstances, be delayed 5-10 or so ; 15 degrees Celsius, herbicide efficacy normal play ; 15-35 degrees Celsius between efficacy with increasing temperature performance faster. But not the higher the temperature the better.

And herbicides for families and genera close to target plants lawn grass, under any circumstances do not arbitrarily increase the dosage , or carried out under the guidance of technicians spraying . Grasses such as Kentucky bluegrass lawns in using consumer bluegrass, miscellaneous consumer controlling crabgrass, goose grass and other weeds ; using clover in clover music broadleaf weeds ; lawn in Golden Horseshoe Horseshoe Net Control in use broadleaf weeds , etc., are not arbitrarily increase the dosage.

For more emaciated weeds , leaves small, upright weeds , control method can be used when spraying twice . As used in bluegrass lawns eliminate Wo controlling weeds crabgrass, the dosage is 90 ml per acre , you need to be watered 25-30 kg evenly spraying . We can eliminate the first use of 45 ml Wo watered 25-30 kg spraying a mu of land, the next day using 45 ml elimination Wo watered 25-30 kg spraying a mu of land, is better than a sufficient amount of perfume sprayer spraying the herbicidal effect .