How to manage the heading and flowering stage of rice?

How to manage the heading and flowering stage of rice? Please introduce the method.

In case of continuous low temperature, overcast and rain during the heading stage of rice, drugs should be widely used to control rice blast, and susceptible varieties should be used twice at the break stage (10% of the rice break in the whole field) and the full heading stage (80% of the panicles are extracted from the whole field). The suitable medicaments are rice distemper, tricyclazole, prochloraz and so on. Among them, rice distemper, tricyclazole and other drugs have strong internal absorption and conductivity, generally there is no rain for 2-3 hours after application, the control effect can be guaranteed. From the weather forecast, most of the recent thunderstorm weather, according to the situation, take advantage of the rain gap spray. When there is water on the rice leaves after rain, it is appropriate to reduce the water consumption, fine spray or spray with a sprayer. In this way, the high concentration of the solution falls on the watery rice leaves and can be diluted twice and evenly distributed to the leaves, so as to avoid a large number of liquid drops from the leaves and affect the control effect.

In order to control false smut of rice, pesticide should be applied about one week before the break of rice. According to the experimental study conducted by Jiangsu Academy of Agricultural Sciences and other units many years ago, Jinggangmycin has the best effect in the control of rice false smut about one week before the break of rice, and there is almost no control effect when it is applied in the break period. From the experiment and demonstration and large-scale production in recent years, it can be seen that benzyl propiconazole, tebuconazole and other fungicides, copper noble basic copper sulfate, copper succinate and prochloraz are suitable for the control of false smut in rice. When used in the heading stage of rice, it also has a certain control effect on rice false smut. In the fields where rice false smut is not controlled by medicine one week before rice break, we can consider selecting the above chemicals to control rice false smut according to local conditions at heading stage.

The overuse of azole fungicides in rice heading stage, especially in the case of low temperature, overcast and rainy rice growth inhibition, may affect rice heading and grain filling. The dosage should be strictly controlled and not blindly increased. Prochloraz and copper noble basic copper sulfate have good control effects on rice false smut and rice blast, and the risk of normal use to rice is small. These pesticides can be used first at heading stage, or mixed with other agents or used alternately. Click to get more rice planting techniques click to get more food crop planting techniques