Bio-control demonstration project for rice blast disease

Biological control demonstration project technology program for rice blast

First, the significance of the demonstration project

Rice blast, also known as rice fever, is one of the most important diseases of rice. Every year, the north and south rice areas in our country have different degrees of occurrence. In popular years, production is generally reduced by 10% to 20%, and serious by 40% to 50%. At present, the prevention and control of rice blast is mainly controlled by chemical agents. The main agent for controlling rice blast in our city is tricyclazole, and it has been used for many years. Tricyclazole has a good preventive effect on rice blast, and has a good effect of spraying before or at the beginning of onset of disease. The area will be prevented from taking any medication regardless of whether or not it occurs in the year. In some areas, rice blast fungus has become resistant to the drug. It is imperative to replace pharmaceuticals and switch to biological sterilizing blends.

Since 2002, Dalian Baoluobao Marine Life Science Research and Development Center Co., Ltd. has used marine shell bio-pesticides and fertilizers, such as “Magic 1”, “Magic 2”, and seaweed extracts for the production of opistamine, a plant disease resistance agent for chitosan. A control experiment was conducted in Paddy City, Panjin City, and the control effect was 96.45%. Practice has proved that these marine biological pesticides and fertilizers are super-efficient plant growth regulators that can significantly inhibit the growth of plant pathogens, increase plant immunity, and have no environmental pollution.

Second, test materials and methods

1. Test materials: Dalian Baoluobao Marine Life Sciences Research & Development Center Co., Ltd. “Magic Formula 1”, “Magic Formula 2”, seaweed extract plant immunopotentiator, and chemical bactericide carbendazim introduced by the company.

2, method:

Prevention period

Control methods

Effect

Seed processing

500 times of Rubik's Cube 1 + algae extract plant and 500 times of mixed solution of immune-promoting opsonization mixed with seedbed soil; use “Magic Cube” No. 1 400x, 50% carbendazim, soaking, 10°C-15°C for 6 days, Immersed in 20°C-25°C for 1-2 days, the water layer is 15cm higher than rice seeds.

Kill the spores of rice blast fungus in the seedbed soil and prevent the seedling shoots from activating seedling disease resistance genes.

Seedling stage

"Magic Formula" No. 1 1000 times, seaweed extract plant immune opsonization, 4% kasugamycin 1000 times spray treatment.

Prevention of leaf plague

Booting stage

From the 3rd day before heading, 800 times of "magic square" No.2, 800 times of opsonization product of seaweed extract, and 800 times of carbendazim mixture spray, once every 10-14 days, once every two to three times.

In the late booting stage, 700 times the "magic formula" No.2, 700 times the immunoregulatory factor of the seaweed extract plant, and 700 times the carbendazim spray, once every 10-14 days.

Fight against ear blast, increase yield and quality.

3. 1 mu of the control group was treated daily with 15% tricyclazole spray and synchronized with the demonstration project.

Third, the survey project

An observation point is set every 21 hectares, and 5 plants are surveyed before each application. Among them, the leafhopper surveys the flag leaf and the following two leaves of the flag leaf. The incidence of leaf blast disease, panicle stem blast, ear blast disease, and yield were investigated.

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