I. Wheat Stripe Rust
The prevention and treatment of stripe rust should be based on the principle of “discover one point, prevent and control one piece, find a piece, and prevent oneâ€. It can use 15% triadimefon WP (triadimefon, brilliton) 100g per Mu, or 12.5% ​​ene per mu. The oxazole alcohol (Wan Guo Li) wettable powder 22.5 ~ 25 grams, watered 60 ~ 75 kg manual sprayer spray, or watered 7.5 ~ 10 kg motorized sprayer spray.
Second, wheat powdery mildew
Moderately mild occurrence occurs. Powdery mildew occurs locally in wheat in our district. The average diseased leaf rate reaches 10.5%, the average diseased plant rate reaches 2.4%, and can be used per mu with 50 grams of 64% Maimian 50g or 25% of Pneumocandotoidae EC 50ml Water spray control.
Third, scab
It is a typical climatic disease. The degree of epidemic is closely related to the prevalence of rice piles and the climatic conditions during the flowering period of wheat. If ferns meet with more than three days of rain during the wheat flowering period, head blight will be a pandemic. On March 11th, the plant protection station conducted a survey on the rate of fertilization of rice heads of the scab strain: the rate of branching bacteria was 4.19.7%, an average of 11.6%. The bacterial load was 0.5 percentage points lower than usual. If there are 2-3 days of rain in the early stages of the wheat flowering in early April, all areas should immediately take measures to prevent the rain. It can use 50% carbendazim WP 100g or 70% thiophanate-methyl WP 75g watered spray Prevention.
Four, locusts
Expected to happen moderately. As the current climate is suitable and the plants are green, which is extremely beneficial to the breeding harm of locusts, it poses a great threat to the production of Xiaochun. Currently, locusts reproduce very quickly and should be highly valued by all localities. When there are pupa strains with a rate of 20-30% or more than 1500 strains, the amount is more than 1500. The field plots should be treated immediately, with 50% anti-influx 20 grams or 10% imidacloprid wettable powder 15-20 grams sprayed.
Fifth, rape downy mildew
In the early stage of downy mildew, a small greenish spot appeared on the front of the leaves, gradually expanded from pale green to yellow, and at the same time, a frosty mildew layer grew on the lesions, and the sick class turned brown later. In order to ensure the normal growth of rapeseed, the prevention and control of downy mildew in rapeseed should be done in various places.
Control methods: The selection of resistant and disease-resistant Gannan type rapeseed planting, rational rotation, and draining of Rhizopsia, in the flowering period of rapeseed, the old, yellow and diseased leaves were removed 2-3 times to reduce the re-infection source. Chemical control should be sprayed when the rate of diseased plants is more than 10% at the early flowering stage, sprayed with 70% mancozeb WP or 500% or 25% WP wettable powder 800 times.
Sixth, Sclerotinia sclerotiorum
Sclerotinia sclerotiorum is commonly known as rotten rod, white culm, and dead culm. The disease mainly damages the stem, causing the stem to rot and dry, causing the plant to die early. In the middle and early March, the period of affection of the ascendant disk was at the beginning of the flowering period of rapeseed. It was the period when it was most susceptible to sclerotinia. I rapeseed varieties are resistant to disease, the temperature is suitable, extremely susceptible to rapeseed nuclear disease.
Control methods: In the early flowering stage, the stem disease rate is below 1%, and the disease rate of the leaf disease should reach 10%. The spraying should be controlled in time. The spray should be sprayed once every 7 to 10 days. The general control is 1 to 3 times. 50% speed can be used. Ling wettable powder 1500? 2000 times or 40% sclerotin net wettable powder 1000? 1500 times or 40% carbendazim gel suspension 100 ml 800? 1000 times spray.
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