Study on the Control Effect of Rice Diseases in ethylicin

In recent years, in rice production in cold regions, the occurrence area of rice diseases has been expanding, and the rate of diseased plants in diseased fields has been rising, which has seriously affected the yield and quality of rice and has become an obstacle to rice production in Heilongjiang Province. In order to clarify the control effect of 20% ethylicin on rice diseases, a field efficacy test was conducted.

Rice blast: Rice blast, also known as hot rice disease, commonly known as fire blast, hanging head blast, neck blast and so on. It is one of the most widespread and harmful fungal diseases in the world, which mainly harms the aboveground parts of host plants. Due to the different damage periods and parts, it can be divided into seedling blast, leaf blast, ear neck blast, branch blast, grain blast and so on. The host range is rice, wheat, crabgrass and other Gramineae plants. Magnaporthe grisea mainly overwinters on diseased rice stalks, and is transmitted to rice fields for infection in the next year. Bacteria are mainly spread by wind, but also by rain, water and insects. When the weather gets warmer and rainy, the overwintering bacteria will revive and multiply in large numbers, and transfer from the diseased straw piled on the edge of the field to the rice for harm.

Ear neck plague: first, choose disease-resistant varieties; Second, rational fertilization, increasing the application of organic fertilizer, phosphorus and potassium fertilizer; Third, use water scientifically to prevent deep water flooding, keep the field dry, and pay attention to ditch cleaning and drainage even in rainy days; 4. Apply pesticide: 2-3 days before the break, use 40% Fuji 1 EC 75- 100 ml or 20% tricyclazole wettable powder 100 g per mu, add 50-75 kg of water, and spray again after 7- 10 days according to the weather conditions.

Rice pests: Exogenous pests are long-distance migratory pests, such as brown planthopper, white-backed planthopper, rice leaf roller, armyworm and so on. In this century, the migration of rice planthopper is relatively light, but it should not be careless. Strengthen monitoring to prevent it from rising. Rice leaf roller continues to be rampant, especially in the fourth generation (from late August to early September), which is seriously harmful to the heading date of japonica rice. Endogenous pests are local insect sources, local reproduction and local hazards, such as Chilo suppressalis, Chilo suppressalis, Laodelphax striatellus and thrips oryzae. In this century, moths make waves, and Laodelphax striatellus is in great trouble.

Laodelphax striatellus: Outbreak factors of Laodelphax striatellus There are eight symptoms of rice bacterial blight: (1) The area of japonica rice is enlarged, the coverage area of susceptible varieties is large, and the number of poisonous insects is increasing. (2) Less no-tillage, wheat-rice interplanting and rice-rice interplanting are beneficial to the reproduction of Laodelphax striatellus. (3) Weed control in wheat field is relaxed, and weeds on three sides (field side, ditch side and roadside) are rarely visited. (4) The number of autumn generations soared, and the wintering base increased. (5) The global climate is warming, and the frequency of warm winters is increasing. (6) There are not many pesticides on the road, the quality of pesticides is not high, and the application technology is not good. (7) The control effect of imidacloprid is reduced, which may have produced resistance. (8) The frequency of moth control drugs is high, mainly organophosphorus pesticides, and the natural enemies in farmland are reduced.

1 Basic information of the examination

1. 1 Pilot unit: Four farm science and technology parks of Sanjiang Administration Bureau, namely Qianjin, Outpost, Nongjiang and Qixing, will be built.

1.2 test situation

The soil types are all meadow albic soil, as follows:

Qianjin farm: pH 4.5-5.5.

Outpost farm: in the third year of changing drought into water, the organic matter content is 3.76; The PH value is 5.9; Available phosphorus 46ppm；; Available potassium 217 ppm; ; Available nitrogen 325ppm；; Available silicon is 230. 1 ppm.

Nongjiang Farm: organic matter 50.7g/kg/kg, PH value 5.5, available K 163 mg/kg, available P 2 1. 1 mg/kg, alkaline hydrolysis N 246 mg/kg.

Qixing farm: organic matter 38.5g &；; G, alkali-hydrolyzable nitrogen148.7 mg/kg, available phosphorus 29.3 mg/kg, available potassium 86.56 mg/kg, pH 6.64, flat terrain.

1.3 test material

Test varieties: Kong Yu 13 1.

Test reagent: 20% ethylicin EC.

1.4 experimental design

Large-area comparison method was used, with clear water as the blank control, and it was not repeated. Each plot covers an area of 5 mu, and it is sprayed with Shandong Guardian brand WS- 16 manual sprayer, and the spraying amount per mu is 15 liter.

1.5 survey method

50 plants were sampled at five diagonal points, and the incidence of each treatment was investigated, and the incidence, disease index and control effect of the sampling points were calculated.

1.6 investigation time: August 12.

2 Results and analysis

2. Effect of1ethylicin on panicle neck blast of rice.

As can be seen from Table 2, the incidence of ear blight of 20% hypertonic ethylicin treatment was 65438 08.7%, which was 65438 04% lower than that of the blank control. The disease index decreased by 8.9% compared with the control, and the control effect of 20% hypertonic ethylicin on rice ear blast was 67.65438 0%.

2.2 Effect of ethylicin on Rice Yield Traits

As can be seen from Table 3, when ethylicin is sprayed on rice, the number of grains per panicle increases by 9.9, the seed setting rate increases by 2%, the 1000-grain weight increases by 0. 1g and the yield per mu increases by 6.5%.

3 Conclusion

3. After1application, rice in each application area has no phytotoxicity symptoms and grows normally, indicating that 20% hypertonic ethylicin EC is safe for rice growth at a certain dose.

3.2 From the field pesticide test results, 20% allicin EC has certain control and yield-increasing effects on rice blast to some extent.

(Author: 1565 1 19 Heilongjiang Jiansanjiang Administration Outpost Farm Management Zone)