Recently, according to a survey conducted by the Funan County Plant Protection Station on most of the rice fields in the county, rice paddy disease, rice smut disease, and flax patch disease have occurred in the later stages of the rice crop. The second generation of borer borer has also begun to cause harm. The vast number of farmers to seize the time to check.

I. Rice Blast According to the survey, leaf bristles have occurred on individual plots in the rice area. In July and August, the rainfall in my county was relatively high. At this time, the rice was in the booting and heading stage of rice. High temperature and rainy weather are more favorable for the occurrence of panicle blast. Rice blast disease is expected to occur moderately this year.

Control methods: Irrigate wet, wet, and promote root growth. In the mid-stage of growth prevention, it is important to note that if there is fog in the morning, cloudy days, and high air humidity, when it suddenly meets the conditions of high temperature, high humidity, strong light, etc. after rain, it is necessary to fight drugs in time to prevent the occurrence of rice blast. The first drug was sprayed at the end of booting or the beginning of the break (heading 5%), and the second drug was sprayed at the full heading stage. Can use 20% tricyclazole WP 75 to 100 grams of water to spray 50 to 60 kg; or 40% of Fuji with 1 Fuji (or rice bran) 80 to 100 grams of water to spray 50 to 60 kg; or Rust and other agents to control. Note: at the end of booting stage, must be used for full heading; flowering can not be used, so as not to affect pollination; full-heading period after playing a drug, if the rain is too much, 5 days after playing drugs again.

Second, rice smut disease in the flowering period, after the rice budding closed, the bacteria can not generally invade, rice Yanghua filling period began to see the disease. During the period from the formation of panicle to the booting stage, if the weather conditions are warm and humid, and the temperature difference between day and night is small, nitrogenous fertilizer may be applied. Later rice strains are “greedish” and the panicle type varieties are all conducive to disease. The disease not only affects the yield, reduces grain weight, but also pollutes rice and affects human health. Based on field surveys and analysis of climatic factors, it is expected that the occurrence of rice smut in our county will be moderately mild, and some plots will be moderately heavy.

Control methods: The prevention and control of rice false smut is mainly prevention. The best time for rice to prevent rice false smut is about 7 days before rice break. Pharmacy can be used: (1) 30% DT wettable powder 100 g / mu water spray; (2) 20% Jinggangmycin crystal powder mu 60 g water spray 60 ~ 75 kg; (3) 14% copper ammonia complex Aqueous agent 400 ml/mu water spray. Note that DT and Ammoniac Copper must not be applied after rice breaks, nor can it be mixed with other drugs, otherwise it will cause phytotoxicity.

Third, the rice leaf spot disease, also known as rice leaf blight. All rice areas occur, and the disease can occur from the seedling stage to the harvest stage. The aboveground part of the rice plant can be damaged, and there are many leaves. The leaves of adult plants became infected with brown dots at the beginning and gradually became elliptic spots, such as the size of sesame seeds. The lesions were brown to gray in the center and brown in the edges. There were different yellow halos around the depths, and they even became irregular large spots. The disease is caused by partial application of nitrogen fertilizer, lack of potassium in soil and insufficient water. The late stage of rice filling is the main period of onset, and attention should be paid to prevention and control.

Control methods: Appropriate supplement of potash fertilizer, combined with chemical control. At the beginning of the disease, use 30% Ai Miao or 30% Jiarun EC for 15 to 20 milliliters (at the same time to cure Rhizoctonia solani), 25% to 100 g 50 to 100 ml, spray evenly to 30 kg of water, 25% triadimefon, 100 g/mu Grams, 30 kilograms of spray on water, 1 to 7 days, even 2 or 3 times.

The fourth and second generations of Sicuanhuai are endangered by the larvae stemming stems. In the early stage of rice growth, the killed rice forms dead heart seedlings. At the late stage of rice growth, dry booties, white spikes (commonly known as white sheaths) and insect-injured plants are formed. The rice damaged by rice stem borer is also susceptible to lodging, which has a greater impact on rice yield. According to the investigation and analysis conducted by our station, the second generation of S. huariana was moderately subtropical, and some of the plots were overweight. It is hoped that the majority of farmers in the rice area will be prevented and treated in time

Control period: Due to the impact of climate factors, it is expected that the second-generation control of this year will be around August 5. Pharmacy can use 18% of insecticidal water-repellent agent 200-250ml/mu water to 30kg spray or splash water or use 40% Fogog (8g/mu), 15% oxazole (150-200ml/mu), 15 % Spray with Tetra (30-50 g/mu).

5. Rice planthoppers Rice planthoppers are a major pest on rice and are a migratory, fulminant and devastating pest. In the four to five generations of Funan County, adults and nymphs can all harm rice. They are generally concentrated in the base of rice stalks or panicles and suck the sap of rice plants, resulting in wilting of rice seedlings. In severe cases, the lower part of the rice plants turns black and rot. The whole plant is atrophic, no panicles are extracted, and even dead. Infestation of rice during booting and heading does not result in heading or affecting the plumpness of rice, resulting in reduced yields. According to the survey, there are rice planthoppers in the county's Baigezhuang, Nanbao, Huanghua, Hugezhuang, Fanggezhuang and other places, among which Baigezhuang, Ronggezhuang, Dingzhuanghu, Haozhuang and other places are heavy. The population density of the larvae reached 800-1000 heads/hundred, and Hugezhuang and Fanggezhuang occurred lighter. At present, the major species of fly locust are the fly locust.

This year, there is more rain, weeds thrive, and environmental and climatic conditions are conducive to the occurrence of rice planthoppers. With the growth and development of rice, the density of insect population will further increase. Due to the recent rain in the south, brown planthoppers and whitebacked planthoppers may migrate in large numbers. Harmful, hope the majority of farmers pay attention to timely inspection.

Chemicals control: 1. Mu 52.25% Ganxi EC 50 ~ 60 grams, spray 30 kg of water. 2. Mu with 10% imidacloprid wettable powder or bufalin wettable powder 20 g water 30 kg spray.

Sixth, rice bran and rice water as a result of different prevention and control situation, the situation is different everywhere. Poorly controlled plots should be strengthened and controlled, and the control agent can be sprayed with 10% Etherrinthrine 25 ml/mu or 25% Avivopogon 1000 times.

The second generation rice leaf roller generally occurs in late August, and the drug is used for the prevention and treatment of tuberculosis. Attention should be paid to the early application of larvae in the early stages of the larvae pestilence, that is, the first roll of worms (1 inch in front).

Eight, rice bran According to investigations, found in the field there are rice larvae. The 3rd instar larvae only took the epidermis of the leaves to make the leaves into long white stripes, and finally became yellowish stripes. After 3rd instars, the larvae mostly took food in the leaves and formed nicks, which could cause the whole plant to die. It is hoped that each rice area will pay attention to inspection and treatment, and medicines will be treated with rice blast.

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