Which herbicides can be used after wheat emerges?
Wheat and weeds differ in their sensitivity to herbicides at different stages, and the safety of herbicides to wheat also varies; the performance of various herbicides differs, so it is very important to correctly grasp the application timing, especially when applying herbicides from the jointing stage of wheat to the young ear differentiation stage, where even more attention should be paid to the safety of the herbicide to wheat. At present, ...
Based on the experience of chemical weed control in wheat fields [Weibo], different chemical herbicides should be selected according to the seedling conditions of different wheat and the different subsequent crops of the wheat. The following herbicides are available for selection.1. 6.9% Puma suspension concentrate or 10% Puma emulsifiable concentrate. It can control many kinds of monocotyledonous weeds. Use 40-80 ml of 6.9% Puma suspension concentrate per mu, or 30-50 ml of 10% Puma emulsifiable concentrate, diluted with 30 kg of water for spraying. The spraying time is preferably at the 3-5 leaf stage of wheat.
2. The Bai-Jia mixture. It can control many kinds of broadleaf weeds, especially difficult-to-control weeds such as cleavers and spring knotweed. Use 10-12 ml of 48% Banvel aqueous solution per mu, plus 125-150 ml of 20% MCPA aqueous solution, diluted with 30 kg of water for spraying. The spraying time is from the 3-leaf stage of wheat to before jointing. This mixture should only be applied to crops whose subsequent crop is rice.
3. 75% Express dry suspension concentrate. It can control many kinds of broadleaf weeds. Use 1-2 g per mu, diluted with 30 kg of water for spraying. The spraying time is preferably at the 3-5 leaf stage of wheat.
4. 20% Starane emulsifiable concentrate. It can control many kinds of broadleaf weeds, and is especially effective against difficult-to-control weeds such as field bindweed. Use 60-100 ml per mu, diluted with 20 kg of water for spraying. The spraying time is preferably at the 3-5 leaf stage of wheat.
5. The Jia-Ben mixture. It can control many kinds of broadleaf weeds. Use 125 ml of 20% MCPA aqueous solution plus 100 ml of 48% bentazone aqueous solution per mu, diluted with 30 kg of water for spraying; the spraying time is preferably after tillering and before jointing of wheat. This mixture should only be applied to crops whose subsequent crop is rice.
In order to improve the effect of herbicides in controlling weeds in wheat fields, the following points should be noted in the use of the ecological environment: first, check the soil moisture; when moisture is insufficient, appropriately increase the amount of water used for dilution, and do not apply the herbicide temporarily when the soil is short of moisture; second, apply it on sunny days with sufficient sunlight; third, apply it when the temperature is around 20°C; fourth, apply it on windless or breezy days to prevent phytotoxicity to surrounding crops.