First, symptom recognition
There are actually two kinds of “wild wilt†of rice, one is the physiological bacterial wilt of paddy rice field, and the occurrence is more common. It is commonly referred to as bacterial wilt and often occurs in combination with blight. The symptom is that the rice seedlings quickly lose water and die, and the seedlings are still green when they die; the other is the bacterial base rot that occurred in the later stage of Honda, which is sporadic in the field, and only 1 and 2 outbreaks in 1 hole. The stem section of the diseased plant is hardened, blackened and accompanied by bad odor. The disease is described later.
(Physiological) Causes of bacterial wilt: Bacterial wilt often occurs before and after 3 leaves of rice. Mainly due to low temperature attack, cold storm or excessive temperature difference, for example, before exposing rice in paddy field, without timely ventilation and hardening seedlings, resulting in seedlings leggy, after exposure, seedlings can not adapt to the environment, resulting in imbalance of water supply in rice seedlings , and then caused by the rapid loss of water above the ground and died.
Second, prevention and control measures
In the Miao Qi, timely ventilation and hardening of seedlings, as long as it is not a windy day, cloudy conditions must also insist on ventilation and hardening seedlings. Aquaculture Yutian, to protect the seedlings by adjusting the water layer before the strong winds come down.
The total roots of blight and bacterial wilt are the growth disorders on the ground and underground (such as leggy or root injury), resulting in a relatively poor root system in the underground. In the case of special weather, the evaporation of roots is large, and the root water supply is large. Not enough, the water is dry and dry on the ground.
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