Preliminary study on the efficacy of glufosinate-mixed diquat herb formula: it is not recommended to mix the two at room temperature.
Glufosinate and diquat are the same as the killing and contact herbicides . Their respective characteristics are that glufosinate is contacted by ammonium, 3 days is effective, and the weeds are thorough, especially for the tendon and small fly. Glyphosate weeds have good eradication, while diquat is mainly caused by strong oxidation, which causes the mesophyll tissue to burn and die, and the quick-acting effect is good. The quick-acting effect of diquat is related to the light. After the fight, 3 or 4 The weeds in the hour are yellow, and the effect on the broadleaf weeds is obvious and the effects on the grass weeds are not obvious.
At present, there are manufacturers on the market to introduce glufosinate, diquat "1+1" barrel mix formula, package formula, etc., so what kind of effect will the formula of the current mixed use show? What kind of formula can better meet the production The need for weeding? What kind of application should the drug use be used? With such a series of questions, we designed a test protocol to explore the test results of different formulations.
First, the choice of test time
In order to verify whether glufosinate and diquat will return to green after a single dose, the field weeds are vigorously grown from May to June. During this period, the temperature is suitable and the rain is rich. The weeds are in a period of vigorous growth and there will be no drought. Severe weather such as low temperatures that affect weed growth occurs.
Second, the choice of grass phase
In view of the fact that the characteristics of diquat are mainly to control broadleaf weeds and have no obvious effect on grass weeds, and whether the combination of glufosinate and diquat can achieve synergy and expand the spectrum of grass killing, it is required to be grasses. Weed-based, with some broad-leaved weeds, chose to grow the crabgrass and goosegrass, and grow the fields of iron amaranth and revolutionary grass.
Third, the choice of pharmaceuticals
Glufosinate and diquat are both selected 200g/L glufosinate water, commercially available regular manufacturer brand, and the conventional dosage is 100ml/15g water.
Fourth, the choice of formula
In order to verify the difference in efficacy between different formulations, and in combination with the consideration of the agricultural, the "1+1" formula was set to the same ratio and the different ratios of the two groups of schemes, as well as a single dose for comparison.
1, the same ratio
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 100ml/15Kg water
Glufosinate (200g/L water) 70ml/15Kg water + diquat (200g/L water) 70ml/15Kg water
2, different ratios
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 70ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 60ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 50ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 40ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 30ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 20ml/15Kg water
Glufosinate (200g/L water) 100ml/15Kg water + diquat (200g/L water) 10ml/15Kg water
Glufosinate (200g/L water) 70ml/15Kg water + diquat (200g/L water) 60ml/15Kg water
Glufosinate (200g/L water) 70ml/15Kg water + diquat (200g/L water) 50ml/15Kg water
Glufosinate (200g/L water) 70ml/15Kg water + diquat (200g/L water) 40ml/15Kg water
3, control
Glufosinate (200g/L water) 100ml/15Kg water
Diquat (200g / L water) 100ml / 15Kg water
V. Test methods
The test was carried out on May 19th, and the field was made into a ridge. Each plot was a 1m*10m ridge. The backpack was sprayed with a meticulous electric sprayer. The day of application and the day after the drug were sunny, 3 days after the drug, 7 Observe the efficacy of the day and 15 days, compare the efficacy results of different formulas, and take photos to prove.
The results showed that the leaves were yellowed 3 days after a single dose of glufosinate, and the grass was withered for 7 days, and the grass was completely dried after 15 days; 3 days after a single dose of diquat, the leaves of grass weeds were more than 2/3 of the yellow, and the lower part The stems were not affected, and the leaves of the upper part of the yellow leaves dried up 7 days after the medicine, and the plants returned to green 15 days after the medicine. The same formulation formula of glufosinate and diquat (100ml/15Kg water + 100ml/15Kg water and 70ml/15Kg water + 70ml/15Kg water). The reaction symptoms in each stage after the treatment of the drug are similar to that of a single dose of diquat, and finally Grass weeds die not completely and return to green.
Glufosinate and diquat have different formulation treatment zones (7 treatment zones) also show different characteristics, the same is 100ml of 200G / L glufosinate, the rapid addition of diquat more than 20ml / 15kg of water, quick-acting Fast (4 hours effective), 15 days of greening; when the rapid addition of diquat in 10-12.5ml / 15kg water and 100ml of 200G / L glufosinate, can speed up the killing speed at low temperatures, It does not affect the herbicidal effect of glufosinate in addition to roots, and does not return to green.
200g / L glufosinate water 100ml / barrel of water
200g / L diquat fast water agent 100ml / barrel of water
Glufosinate and diquat faster 20ml-40ml addition amount / barrel same ratio
Glufosinate and diquat are different in ratio
200G/L glufosinate 100ml+200G/L diquat 10ml
Conclusion
It can be seen from the results of different test treatments that glufosinate is mixed with diquat in normal temperature at room temperature. At the conventional dose of glufosinate, whether the diquat is fast or the conventional dose (100ml/15kg water) is still half as low as the conventional dose. The following (40ml/15Kg water), the final efficacy results show the symptoms of poisoning and the final effect of diquat, but can not reflect the eradication effect of glufosinate, which also shows that the enemy grass quickly showed The rapid and strong oxidative burning of the underage weed leaves hindered the ammonium-phosphate contact and the stem-to-stem conduction of glufosinate on the leaves of grass weeds. The combination of the two showed no effect of glufosinate, glufosinate The genus is wasted, and the farmer is increased. Therefore, at room temperature, it is recommended that you do not recommend to the farmers to mix and match between the two.
Only in low temperature (late spring, early summer), below 20 °C at noon, below 15 °C in the morning and evening, when a bucket of water (15KG), 200G / L glufosinate spray, add 10ml of diquat per barrel (maximum More than 12.5ml) can be used as an "auxiliary" to increase the herbicidal rate of broadleaf weeds without affecting the root-killing effect of glufosinate, but it will also cause antagonistic effects on grass weeds. Analysis of the mechanism of action, the combination of the two is an antagonistic effect, not suitable for compound use.
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