How to prevent blast disease on spring rice

(Baonghean) -Currently, blast disease has appeared on rice in some communes in the lower regions of Nghi Loc district, Vinh city and Hung Nguyen.

Faced with the above situations, all production facilities need to promptly take proactive measures to prevent and control pests as soon as they appear in small areas, which is easy to prevent, saves production costs and achieves high efficiency. To do so, we need to implement the following measures well:

- Regularly visit the fields, wade through the fields to check and detect early outbreaks of pests on rice plants when they first appear to isolate the area and spray pesticides to destroy them immediately with specific pesticides purchased from pesticide trading establishments provided by the Plant Protection Department to prevent buying fake or poor quality pesticides that are ineffective.

- The following pesticides should be used to spray against the main pests of the spring crop:
+ For rice blast disease, use the following drugs: Beam 75WP, KaBeam 75WP, Katama 20 SC, Pilia 525SE and Pujion 40WP.

+ For brown planthoppers and white-backed planthoppers, use the following drugs: Basa 50 EC, Alika 247 SC, Penalty gold 50 EC, Victory 585 EC.

+ For rice stem borers and rice leaf rollers, use the following chemicals: Dupont Prevathon 5 SC, Virtako 40 WG, Regent 800 WG, Rambo 800 WG and Tango 800 WG.

Dosage and spraying method follow the instructions on the packaging and label of the medicine package.

Using chemicals is the last resort when pests appear. Normally, it is necessary to implement good farming methods, especially the use of fertilizers and fertilization methods to achieve high crop yields while not creating opportunities for pests to develop, especially rice blast and brown spot disease on rice plants.

Currently, rice plants have entered the stage of fertilizing to promote growth. This is the time to apply heavy fertilizer to help the rice plants grow quickly and grow well. This fertilization will determine whether the rice yield is high or low. Many farmers who apply fertilizer are focusing too much on nitrogen fertilizer and neglecting other types of fertilizer, especially potassium.

If only nitrogen fertilizer is applied without potassium fertilizer at this time, the rice will grow strongly in stems and leaves, the rice plant will be weak, combined with a lot of fog and high humidity, it will be difficult to avoid leaf blast disease, causing rice leaf burn. Therefore, when fertilizing rice at this time, it is best to combine 3 kg of urea + 1 kg of potassium and it is best to use NPK 15-5-20 fertilizer for rice to be most secure. Particularly on sandy soil, light loam, the fertilizer should be divided into 2 applications, each time 7-8 days apart to prevent the rice from "leaf-tipping" and creating too much excess nitrogen on the leaves, which is an opportunity for rice blast disease and leaf rollers to destroy.

The most effective method of fertilizing at this time is to drain the water 3-5 times, then fertilize, combine weeding, stirring up mud, burying fertilizer in the ground for the plant to absorb gradually and create airy conditions for the root system to develop well. If you can do this, the rice will grow well, will be less damaged by pests and will achieve high yields.

Doan Tri Tue