Nong Si can beat bowl flowers in sesame fields.

Liu Bengui in Shouxian County, Anhui Province called to say that bowl flowers in local sesame fields have occurred seriously in recent years, and they cannot be controlled with common herbicides, and they do not know which herbicide should be used to control this weed.

According to relevant data, chemical weeding in sesame fields can be used with 48% trifluralin EC 80-100 ml per mu or 70% Pocaojing wettable powder 50-70 grams per mu before sowing. After adding water, it is evenly sprayed on the soil surface, and then the soil is 3-5 cm deep, which can control annual Gramineae weeds and some broad-leaved weeds.

Or before sprouting after sowing sesame seeds, use 48% dole EC 130-180 ml per mu, or 20% diachlor EC 120-250 ml, or 50% dimethachlor EC 150-200 ml, or 48% lasso EC 150-250 ml, or 25% Nongshita EC 75-100 ml, spray water on the soil surface to control annual Gramineae weeds and some broad-leaf weeds. The high soil moisture is beneficial to the efficacy of the drug.

The treatment of stems and leaves after seedlings can be treated with 12% Shoulotong EC 25-35 ml per mu, or 10.8% high-efficiency Gai Cao Neng EC 25-30 ml, or 15% Jingzhang EC 50-70 ml, or 7.5% Weiba concentrated EC 50-60 ml, adding water spray, which has a good control effect on annual and perennial Gramineae weeds. When the soil moisture is suitable and the weeds grow vigorously, the weeding effect is better. In the mixed field of Gramineae weeds and broadleaf weeds, cover grass can be mixed with appropriate amount of bentazone, Huwei, weed burning or kekuole in the 3-5 leaf stage and 2-4 leaf stage of Gramineae weeds.

Among the above-mentioned herbicides, herbicides such as Nongsita and weed burning have better control effect on Bowl flower (split leaf morning glory, round leaf morning glory). Among them, Nong Si Ta (oxazolone, oxazoling) can control weeds such as Magnolia mandshurica, wild millet, autumn millet, dog tail grass, paspalum, wild watermelon seedlings, purslane, abutilon, amaranth, quinoa, split leaf morning glory, round leaf morning glory, prickly yellow flower, gorilla grass, big fruit sesbania and other weeds. Trifluorocarboxylic ether can control annual broadleaf weeds such as Solanum nigrum, Polygonum polygonum, Polygonum wilfordii, Polygonum polygonum, Ruisheng, iron amaranth, Commelina, Elsholtzia splendens, Abutilon theophrasti, ragweed, Bidens, quinoa, Xanthium sibiricum, Datura mandala, Portulaca oleracea, Corngrass, Petunia angustifolia, Petunia rotundifolia, Polygonum przewalskii, Polygonum angustifolia, etc. It has a strong inhibitory effect on perennial borage, thorn cabbage, big thorn cabbage and bauhinia.

Weeds burning and other herbicides to control broad-leaved weeds may also do some harm to sesame. It is suggested that the application area should be expanded after a successful trial in a small area.