Recently, many netizens said that the soybeans they planted were seriously harmed by the twill moth, and in the face of rampant gluttony to eat soybean leaves, what technical measures should be taken to achieve insect rations, high yields, good quality, and envy?
Hello netizens! The following @ laosan said that according to the pest control experience encountered in planting soybeans for many years and the pest control technology, the three farmers selflessly dedicated themselves to the netizens in need. I hope that netizens will use it flexibly.
1. Field symptoms:
The twill nocturnal moth is also known as the night thief, and some places call it aconitum, and the names are different from the insect class Lepidoptera noctuidae.
The larvae are omnivorous and eat large amounts, and the hatching seedlings are pest on the back of the soybean leaf, eating the leaf flesh, leaving only the epidermis of the soybean leaf as a reticulated membrane;
After the age of 4, it enters the period of binge eating, and when it is rampant, it can eat up the leaf area of the host soybean leaf and relocate to other plants. Causing the leaves to be missing, mutilated, or even eaten up, it is easy to erupt into disasters.
Second, the morphological characteristics:
Found in soybean fields in 2014, adults 11-22 mm, wingspans of 36-45 mm, forewings with many markings, and white stripes in the middle. The mature larvae grow about 37 to 50 mm in length, and are large in size, with black brown and dark brown, and each segment has an approximate triangle.
Third, the occurrence of the law:
1. The larvae occur in July to August, the development temperature is 28 degrees to 30 degrees, and the humidity in the field is above 75%.
2. Lurking on the back of the leaf or lurking in the dark places such as the crevice of the soil during the day, and coming out at night or in the evening to eat the leaves.
Fourth, the prevention and control methods:
1. Remove weeds inside and outside the soybean field, and plough the soil or immediately grout the soil after harvesting soybeans to destroy the activity site of the twill moth.
The benefits of this are:
It can effectively reduce the source of insects, promote soybean grain saturation, increase the weight of 100 grains, and increase yield.
2. Hang rusty adult insects in the soybean field.
Increase soybean grain weight, improve grain maturity, increase yield and yield.
3, the use of 150 grams of sugar + 250 grams of rice vinegar + low-grade liquor 70 grams + water 120 grams + enemy insects, with sweet and sour liquid, stir well, trap the twill moth.
To do this well, it is:
Tempt the twill moth pest, leaf preservation, root preservation, prolong leaf and root function, promote soybean grain fullness, thereby increasing grain weight, but also to achieve the effect of suitable early maturation.
4, with cotton bollworm nuclear polyhedral virus suspension agent 22 g + 50% of the thiamethoxine water dispersion granules 5 g + water 40 kg, stir evenly, in the windless sunny evening spray on the front and back sides of the leaf.
Sprayed in the soybean twill nocturnal activity of the site, the virus multiplied in large quantities in the body, so that after the pest was eaten, it was infected and deadly, the medicinal effect was long-lasting, it had a continuous infection, and reduced the rampant overeating of the group.
5, with 40% of chlorpyrifos emulsion 50-70 ml + 4.5% high efficiency cypermethrin 30 ml + water 100 kg, stir well, in the evening spray leaf front, reverse two sides.
The insecticidal knocking force is strong, reducing the harm promotes the degree of soybeans, and can improve the grain fullness and grain weight of soybeans, thereby improving soybean yields and increasing economic benefits.
Scientific planting of soybeans, scientific control of soybean diseases and insect pests, reduction of the degree of harm, the reduction of damage to the minimum, improve yield, improve quality, increase economic benefits are the expectations of farmers is also @ the third said three farmers look forward to.
Thank you netizens click to pay attention, click to read, click to appreciate ah!
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