Frequent rainy weeds plant more garlic to prevent early
The sowing period of early-maturing garlic in autumn is approaching. In many fields where garlic is ready to be planted after harvest, weeds are growing rapidly and abnormally. According to our investigation, one is the variety of weeds, monocotyledonous weeds and dicotyledonous weeds. Mixed occurrence; second, it occurs early, the growth process is often faster than garlic; third, the occurrence is large, the density of weeds is high, and the number of weeds per square meter is often more than 100; the fourth is that the damage period of these weeds is relatively long, so from planting At harvest, it will symbiosis with garlic, competing for glory, fertilizer, water, and living space. Fifth, judging from the lessons of the past years, weeding is not enough to cause serious harm. The lesser ones will reduce the garlic production by 20% to 30%, and the heavy ones by 50%. Above, we can see that the task of garlic weeding is very arduous and urgent.
In order to overcome weeds and increase garlic production, it is necessary to adopt agricultural and chemical comprehensive control methods to prevent them early.
Lower the base of weeds from the source
All kinds of weeds are very vigorous. They reproduce by seeds and remaining stems and leaves. In order to reduce the harm of weeds to garlic from the source, one is to rotate the fields where garlic is to be planted, because garlic is not allowed to be stubble. For planting, paddy field and dryland cropping can be implemented, grain garlic cropping can be implemented, cotton garlic cropping can be implemented, rapeseed garlic cropping can be selected. The second is to prepare the ground well before sowing, grab the sunny day and thoroughly dry the soil, so that the soil is soaked in the grass, the upper part is weak and the lower part is solid, so as to reduce the residual rhizomes of weeds. Third, prior to planting, focus your labor and time to manually weeding as a surprise to eliminate weeds at the budding stage.
Classification for chemical weeding
For fields dominated by monocotyledonous gramineous weeds, use 50 ml of Hancaojing (ethoxy·acetochlor) or 50 ml of acetochlor per mu after sowing garlic before emergence, and add 30 kg of water to each acre. Spray, or use 48% trifluralin EC 200~300ml per mu, or 33% Chuwetong 200~250ml, or 50% Dahuili wettable powder 120~140g, spray with 50kg of water respectively. When weeds enter the 2~4 leaf stage, spray with 25~40ml of 5% Kuaipujing EC and 30kg of water. For the dicotyledonous broad-leaved weeds dominated by mother-in-law, pigs, and chickweed, after garlic sowing to before emergence, spray with 50% Promethazine per acre with 30-50 kg of water. For mixed monocotyledonous and dicotyledonous weeds, after sowing garlic to before emergence, use 150-200 grams of 50% isopropyluron per acre and spray with 50 kg of water. For the mixed growth of monocotyledonous, dicotyledonous weeds and sedges, after the garlic is sowed to the seedling stage, or the garlic has 2 leaves, 1 heart and 4 leaves, use 48~72 ml of 24% Gore EC per mu, or 37% Yicaoning EC 110~180ml, or garlic sowing to the erection stage, use 40% oxaline EC 100~140ml per mu, and spray with 40~60kg of water.
Pay attention to improving the effect of weed control
Chemical weeding of garlic is the same, but the effect is often very different due to inadequate measures or weather changes. Therefore, based on the experience and lessons over the years, we must pay attention to the following points during the weeding operation: first, select stubble fields with a small base number of weeds, and try to prevent and eliminate them as much as possible before planting; second, the field moisture should be better when spraying. If the moisture content is insufficient or the weeds are too large, increase the amount of water used for the medicine. The third is to avoid high temperature or rainy spray; the fourth is to spray the volatile trifluralin and other herbicides. Soil mixing; Fifth, use different kinds of herbicides alternately to avoid a single drug that makes weeds resistant.
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