Skillfully use herbicides to grow onions, onions and onions are used in different amounts

In the process of planting onions and onions, the rational use of herbicides can effectively increase the yield, but in different growth stages, different herbicides should be selected to avoid improper selection and affect the yield. Raising seedlings: suitable for application after sowing and before emergence. After transplanting: before the weeds emerge after transplanting, the application time should also be adjusted according to the air temperature. It is best to use it at noon on a sunny day when the temperature is low, and in the morning or afternoon when the temperature is high.

Planting onions with herbicides skillfully

At present, the planting area of spice crops such as onions and onions is expanding, and herbicides will be used to increase the yield in the planting process, but if the herbicides are not selected properly, it will reduce the yield or lose the harvest, and will affect the following crops.

1. Onion

Onion seedlings can be sprayed with 50% of prometryne wettable powder 65-75g and 40-60 kg of water per mu. After soil preparation, before transplanting and 3-4 leaf stage after onion transplanting, 24% Guole 66-72ml or 43% Hanchaoling 80-100ml per mu were sprayed with 50-60 kg of water respectively.

2. Onions

When raising onion seedlings, 33% herbicide EC 100ml per mu or 48% trimethopramine EC 150ml and 50% herbicide No. 1 wettable powder 150g per mu can be sprayed with 50 kg of water respectively. Onions can be sprayed with 48% trifluralin EC 100-150ml per mu, or 48% trimethoprim EC 200ml, 50% Dahuili wettable powder 100-150g, 50-60 kg water before transplanting.

Onions can be sprayed with 33% herbicide EC 100-150ml or 50% riguron wettable powder 100 g per mu after transplanting and 50-60 kg water. In order to improve the effect of applying herbicides to onions and onions, it should be applied before emergence after sowing and before emergence of weeds after transplanting. Onions can not be used during the 2-leaf period, and be careful before 3 leaves. Generally, when the temperature is low, it should be applied around noon on a sunny day, and when the temperature is high, it should be applied in the morning or afternoon. Do not apply prometryne when planting in sandy soil.

Types of herbicides

The main results are as follows: 1. according to the transmission of herbicides in plants, herbicides can be divided into contact herbicides, internal absorption conduction herbicides and contact and internal absorption conduction comprehensive herbicides.

2. According to the mode of action of herbicides, herbicides can be divided into selective herbicides and sterilized herbicides.

3. According to the application method of herbicide, it can be divided into stem and leaf treatment agent, soil treatment agent and double treatment agent of stem and leaf and soil.

4. According to the chemical composition of herbicides, they can be divided into inorganic herbicides and organic herbicides.

5. According to the action mechanism of lake grass, it can be divided into growth regulators, photosynthesis inhibitors, amino acid biosynthesis inhibitors, fatty acid biosynthesis inhibitors and cell division inhibitors.