What kind of medicine should be used to prevent rapeseed albino seedlings?

I depart from rape and go to the smooth hair period. The incidence rate of autumn leaves reaches 10%, and the rate of menstrual braids reaches 10%. It is a strong fight to prevent the visible eyes from being able to use 50% of the more Jinling visual memories.

After 2 to 3 years, 40% of the gold and ship 2 to 3 two leaves of water 100 pounds of operating spray. Sprays are used mainly on the middle and lower part of the spine and on the ground. For susceptible varieties and long-term surpluses, 7 to 10 days after establishment.

In preventing everything to improve the effectiveness of prevention and control.

Rapeseed bacacia is a fruit borer pest because larvae eat flowers and fruits.

Larvae. The body color varies greatly, and there are many types of green, taupe, and greenish-brown. The mature larvae are greenish-brown, about 40 mm long, with a smooth body surface, white dotted lines on the dorsal surface of the body, nodulous protrusions on each segment, and short black hairs on them.

The body color of the adult is relatively yellow, the lines on the forewings are clear, and there is a brownish-black line on the middle of the brownish-black wide middle of the hindwings, and the outer side is slightly concave.

Ovum. Slightly flattened, the longitudinal edges are long and short, in a double-ordered manner, and the egg hole is obvious. larvae with two anterior thoracic lateral hairs &; 40; l1、l2& #41;The line is away from the lower end of the anterior chest valve; Small spines on the body surface are shorter.

Chrysalis. The anterior segment of the body appears stubby, and the valves are small and low, with little protrusion.

Look at this kind of bug.

It comes in several colors.

Prevention and control methods: 1. Agricultural prevention and control strategies

a. Ploughing, pruning, and removing insect fruits;

b. Early, medium and late maturing varieties are planted together;

c. Plant corn trap belt in the field to lure moths to lay eggs.

2. Measures to trap and kill adult insects:

Sexual attractant booby-traps. A black light is set up every 50 acres of land to trap and kill adults.

3. Pharmaceutical prevention and control measures:

Note that the control of larvae must be mastered before the 3rd instar stage, and the application should be in the morning, focusing on spraying the upper part of the plant. The following agents can be used for prevention and control:

A, BT, HD-1 and other Bacillus thuringiensis preparations or cotton bollworm polygonal virus for 2 consecutive times;

b. Baode emulsifiable concentrate 2000-4000 times.

c. 20% cyanuride chloride emulsifiable concentrate 2000-4000 times.

d. 20% pyrethroid EC 2000-4000 times.

e. Kung Fu emulsifiable concentrate 2000-4000 times.

f. Uranus EC 2000-4000 times.

For your reference, I hope it can help you [smiley].

Sclerotinia sclerotinia is also known as sclerotinia soft rot and stem rot, and farmers also call white rod, hemp stem, mold and so on. It is one of the most harmful fungal diseases in rapeseed production in China. The incidence rate is 10% to 30% in normal years, and can reach more than 80% in special years.

After rapeseed susceptibility, the number of horn grains and the 1000-grain weight of rape decreased significantly, which can generally reduce the yield by 10% to 30%, and the yield in severely diseased areas can be reduced by more than 30%.

Pathogenesis. The young leaves, leaves, stems, petals, horns and seeds of rapeseed can be infected, and the disease can occur throughout the growth period, especially in the full flowering stage. In the early stage, the basal petiole is mostly invaded, and the diseased leaves first appear round water-stained lesions and then turn blue-brown, with whorl stripes and grayish-white mold; At first, the diseased stem appears light brown water-stained lesions and then turns grayish-white, and when the disease is high, there is white mold on the soft rot surface of the diseased part, and the epidermis is cracked like hemp silk after drying, and the inside of the diseased stem is destroyed and rotted into a hollow, and white mold and black rat feces cause branches or the whole plant to die; After the damage of the shorn fruit, the seeds turned white and shriveled, and the yield and oil content decreased. The disease is aggravated when rapeseed lodging due to excessive growth and when the climate is high temperature and humidity.

Prevention and control methods. Agricultural control: Seed clearing. Dry before sowing to achieve the effect of sterilizing the core, but not to the sun. After the sclerotia is initially removed, the seeds are selected with 5kg of salt or ammonium sulfate mixed with water, the floating grains and sclerotia are removed, and the seeds are rinsed with water before sowing.

Implement crop rotation to clean the farmland. The seedbed is not allowed to be replanted. After the rapeseed is harvested, the diseased residues in the field, roadside and off-site will be completely removed and disposed of in a centralized manner.

If used as compost, it must be fermented at high temperature. Straw slag cannot be directly applied to the field as fertilizer. It is best to implement water-upland rotation in the field, and dryland rape should be used in the rotation of winter crops such as wheat to avoid heavy cropping.

Strengthen field management. Pay attention to ditching and draining stains, so that the rain lives in the field and dry; Reasonable dense planting to reduce field concealment and lodging; Pay attention to the application of basal fertilizer, increase the application of phosphorus and potassium fertilizer, and apply sprout fertilizer early to avoid excessive application of nitrogen fertilizer at the flowering stage; Do a good job of cultivating soil to remove diseased, yellow and old leaves in time, and then take them out of the field to reduce the spread of pathogens.

Chemical control: in the field of rape from the beginning of flowering to the full flowering period of plant leaf incidence rate of 10%, stem incidence rate of 1% need to be sprayed in time to prevent and control, 50% carbendazim wettable powder 2-3 taels or 40% sclerotia net 2-3 taels mixed with water 100 kg evenly sprayed per mu. The focus of spraying should be on the middle and lower stems and leaves of the plant and the ground, and the susceptible varieties and the fields with excessive growth should be controlled once after an interval of 7-10 days to improve the control effect.

The effect of pesticide rotation is better, and the production is usually sprayed once a week after the first flowering of rapeseed, and then sprayed again during the flowering period.

1. Change wet tillage and wet tillage to dry tillage. Rice fields planted with rape should be drained and dried 5 to 7 days before ploughing.

Second, change the hole transplanting to ditching and planting. The method of ditching and placing seedlings is adopted, and then the roots are pressed with soil fertilizer, and the roots of rape seedlings are dry and breathable.

3. Change the shallow ditch to a narrow ditch and deep ditch. Narrow furrows and deep ditches are conducive to removing water accumulation in the soil and reducing soil water content.

Fourth, change the flood irrigation to the artificial irrigation to fight drought. In case of long-term drought and no rain during rape transplanting, it should be watered manually in time to fight drought.