Chemical Control of Weeds by planting Peanut

Peanut is one of the main cash crops in Yanshan, weeding is the most time-consuming in the process of cultivation, and the most harmful weeds in peanut field are Gramineae, Setaria angustifolia, Euphorbia angustifolia, cricket grass, barnyardgrass, etc. Broad-leaved weeds include spinosa, cyperus, goose intestinal grass, bitter, small spiral flower, Cardamine, Polygonum, quinoa, amaranth, bean and nigrum and so on. According to the characteristics of many kinds of weeds and different growing periods in peanut field, better results can be achieved by selecting different herbicides for different weeds and applying appropriate amount of herbicides in different stages of peanut planting. In this paper, several commonly used techniques for chemical control of weeds in peanut fields are briefly introduced as follows:

1. Pre-bud herbicides of peanuts after sowing

Before the emergence of peanut before sowing, different herbicides were sprayed on topsoil according to different types of weeds, covering to form a film layer, and the surface was closed for weeding.

1. Peanut fields with more Monocotyledon weeds.

For every 667 square meters, choose 72% Dur 100-150 ml plus 40 kg water evenly spraying, or 50% Acetochlor 150-200 ml plus 40 kg water evenly spraying, or 48% Lasol emulsion 100 grams mixed with 25% diuron wettable powder 100 grams plus water 40 kg spray.

2. Peanut fields where monocotyledon and dicotyledonous weeds are symbiotic.

Every 667 square meters choose 50% quick harvest 4 grams plus 90% Horace 60 milliliters, add 40 kilograms of water to spray. Or three days before sowing peanuts (or three days before sowing to sprouting), spray evenly on weed stems, leaves or ground surface with 20% gram without trace 120-180 ml and 30-45 kg of water.

Saline-alkali land, wind-sandy arid land, sandy loam with low content of organic matter, especially arid or waterlogged land generally do not use pre-budding soil treatment to weed, but should adopt post-seedling stem and leaf treatment.

Second, stem and leaf treatment after seedling.

After peanut sowing, due to busy farm work or climatic factors, pre-bud surface closed weeding can not be carried out. After peanuts and weeds are unearthed, grass weeds are in 2-4 leaf stage and broad-leaved weeds are 5-10 cm high.

1. Gramineae weed

For every 667 square meters, choose 6.9% Weiba 40-50 ml, or 10.8% high-efficiency cover grass can 25-30 ml, or 15% Jingshu 40-50 ml, or 20% fine grass gram 30 ml, add water 40 kg stem and leaf spray, can control annual Gramineae weeds.

2. Broad-leaf weeds

For every 667 square meters, using 24% kekuole 8-10 ml, or 25% Huwei 60 ml, adding 40 kg of water, can effectively control common broad-leaf weeds.

Peanut field with mixed gramineous weeds and broad-leaved weeds can be used in peanut field special herbicide Kecaoxing (peanut treasure), which can be used from 2 to 3 compound leaves of peanut to before sealing ridge. the method of use is as follows: (1) peanut 2: 3 compound leaves, weeds 1: 3 leaf stage, 40 ml / mu of Kecaoxing is evenly sprayed with 40 kg water. (2) the 4 compound leaves of peanut were sprayed evenly with 50-65 ml of Kecaoxin and 40 kg of water at the stage of 4-6 leaves of weeds before ridge sealing. Or choose the mixture of the above two herbicides.