(1) Symptoms Fusarium head blight is a fungal disease. From flowering to milk ripening, the spikelets on the spikelets appear as water-stained, light-brown spots, which extend to the full ear. When the climate is humid, a pink adhesive layer of mildew develops on the base of the susceptible spikelet, and coal-like black particles appear later. The red mold layer is the conidia and conidia of the germ, and the black particles are the ascostic shells of the germ.
Gibberella is determined by the degree of interaction between the amount of bacteria, host disease, growth period, and climatic conditions. In the wheat region of the Huang-Huai-Hai Plain, as long as there is a large amount of primary pathogenic bacteria in the initial stage, during the period of wheat heading and flowering, there will be more rainfall, more rain and more humidity, and the disease will become popular. The longer the duration of the environment conducive to disease, the heavier the disease epidemic. The small amount of bacteria and the dry weather and low rainfall during the susceptible period are the main factors limiting the disease epidemic. However, in some wheat districts and individual years, the temperature during wheat heading and flowering is particularly low and it is not suitable for disease development. Therefore, low temperature is one of the main factors that limit the disease epidemic.
(2) Drug control Adding 600-800 times of food-specific Tianda 2116 to the spraying of fungicides at the flowering stage of the panicle-flowering stage can significantly increase the disease-preventing effect and increase the resistance to stress and yield. The co-administration of drugs is as follows:
50% carbendazim or 70% thiophanate-methyl wettable powder 800 to 1200 times spray, 100 kg per mu, can effectively prevent the disease epidemic, the general medication 1 to 2 times; use multi-fu mixture (including more than 25% Bacillin, 15% thiram, 500 times liquid spray, can cure both head smut; spray with 40% sterilized dan wettable powder 200 ~ 300 times, can cure wheat stem rust disease; use wolfberry WP not only It can effectively control head blight and can also treat diseases such as powdery mildew.
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