Jincheon-gun has issued a warning for sheath blight and bacterial grain blight. Jincheon-gun Agricultural Technology Center (Director Nam Ki-soon) has requested thorough management through self-inspection and control as the hot and humid weather continues due to the continuous scorching heat and heavy rain, and the number of rice diseases and pests is increasing.
According to the recent regular monitoring results of the Jincheon-gun Agricultural Technology Center, leaf sheath blight (paper blight) and bacterial grain blight are spreading rapidly in Jincheon.
Leaf blight is a fungal disease that displays gray cloud-shaped patterns. The optimal conditions for its occurrence are a temperature of 30-32℃ and an environment with a humidity level of 96% or higher between plants.
In particular, the disease is more likely to spread in fields where nitrogen fertilizers are overused, rice is sown too early, and early cultivation has occurred, and when it occurs, the yield is reduced by up to 50%.
As the high temperature continues and the vertical progression of the disease (moving from the lower leaf sheath to the upper one) is becoming active, there is concern about a decrease in yield. Therefore, the affected area should be sprayed with the applicable pesticide sufficiently so that the pesticide reaches the bottom of the stalk where the disease pattern is.
Bacterial rice grain blight is a seed-borne disease that overwinters in the seed and is transmitted to healthy seeds during soaking or overwinters in straw and other materials and becomes a source of infection in the field the following year.
In the early stages of infection, the part where the rice grains are formed turns brown, and gradually the entire rice grains change color, the ears stand upright, and the rice grains do not ripen and become stalks.
It occurs well in an environment above 30 degrees Celsius before and after the rice head shattering, and the pathogen that was latent in leaf tobacco, etc., invades the rice grains when favorable conditions for the disease occur during the heading period, so the disease appears significantly in high temperature and humidity during the rice heading and flowering period.
Spraying twice before and after Isaac’s fan is effective, and control can be done with registered pesticides such as gasgamine and oxolisan.
It is also expected that the occurrence of pests such as moths and stink bugs will increase rapidly due to high temperatures.
Rice moths should be controlled immediately when you see moths flying in by hitting rice plants with a stick in the field or when you see 1-2 damaged leaves.
If you see damage from the mealybug before or after heading, it will cause the ears of rice to stand upright and dry up, and it is difficult to control because it hides in the stem or water even at the slightest shock or sound, so spray pesticides at dusk after draining the water in the field.
An official from the military agricultural technology center said, “The recent record-breaking heat wave has created an environment favorable for the outbreak of pests and diseases,” and added, “We have completed joint pest control for preemptive prevention, but we ask that you conduct self-forecasting before harvest to implement timely pest control in case of additional pests and diseases.”
Queen Choi Ha Na Reporter Photo Jincheon-gun
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2024-08-26 21:13:06