The control technology of pests and weeds in wheat returning stage
With the rise of temperature, wheat growth has gradually entered the returning green period. At the same time, weeds, wheat sheath blight, wheat bran, wheat spiders and other pests and weeds have begun to spread. In order to promote the healthy growth of wheat, reduce the damage of pests and weeds, and ensure the high yield of wheat, it is particularly important to do a good job in the prevention and control of diseases, pests and weeds in the wheat field.
First, the object of prevention
Weeds in wheat fields: Due to the drought in winter, there are few weeds and the excavation rate is less than 40%. The area before winterization is small. At present, wheat fields that have been poured over winter water and watered in early spring have good field conditions and the rate of weeds excavation has reached more than 90%. In the wheat returning period, the weeds are small in size and grow tender, and the number of weeds covered by wheat is small. This period is an opportunity to control the weeds in wheat fields.
Wheat sheath blight: turning green - jointing period (middle and mid March), wheat sheath blight in the horizontal expansion period, rapid spread, stop interplant infection after jointing, transfer into the stem invasion of the plant damage. The irrigated land plots in the plain area and the Shanling area are the focus of prevention and control. It is necessary to seize the key period of prevention and control before returning green to jointing, and to do a good job in the prevention and control of sheath blight as soon as possible.
Second, prevention and treatment time
In mid-March.
Third, the main technical measures
1. Control of weeds: Use wheatgrass and other common weeds as the main control object for wheat fields, and use 10% wheat bran 15-20g to control 30kg of water; use vicious weed eyes and piglets as main To control the wheat fields, use 20% mu to make it 50-60 ml long, plus 10% wheat bran 15-20 g to control 30 kg of water, and to use oats as the main control object, and use 10% wheat straw 15-20 mu. Kejia 6.9% Hummer 60-80ml control 30kg of water.
2. Disease prevention and control: The occurrence of wheat sheath blight occurs in crops, and can be controlled by spraying 12.5 percent of Zhixing Xing or Huaiguoli 20-30 grams on 30 kg of water. The spraying of the liquid on the stem base of the plant should be noted.
Fourth, pay attention to matters
1. The technical requirements for weed removal in wheat fields are high. Improper application of pesticides is prone to injury. Plant protection experts specifically remind farmers that they must master the spraying period and control techniques so that they do not re-spray or spray.
2. Choose sunny, weather-free weather. When spraying, prevent the liquid from drifting to the surrounding broadleaf crops to produce phytotoxicity.
3, spray the use of soapy water before and after application of the device. Http://
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