Rice field weed arrowhead preventing and control method

Abstract

The invention discloses a rice field weed arrowhead preventing and control method. During first-time sealing, oxadiazon and pyrazosulfuron-ethyl are applied in a muddy water state by means of a bottle swing method in 5-7 days before rice transplantation and after rice field water-containing soil preparation, a water layer of 3-5 cm is kept, rice seedlings are transplanted in 5-7 days after pesticide application, water draining is not performed within 48 hours after pesticide application, and a water layer of 3-5 cm is kept; during second-time sealing, pyrazosulfuron-ethyl and bensulfuron methyl are mixed with a fertilizer or sandy soil to be applied in 10-15 days before rice transplantation, a field water layer of 3-5 cm is kept for 5-7 days; at an active tillering stage of growing rice and when each wild arrowhead seedling has 5-7 leaves, a bentazone aqueous solution and pyrazosulfuron-ethyl are evenly sprayed in a field, field water is completely drained before pesticide application, water is returned within 1-2 days after pesticide application and is kept for 3-5 days; at a booting earlier stage of the rice, new bulbs of arrowheads doe not grow out, artificial pond clearing is conducted at the moment, and arrowheads are pulled out. By means of the rice field weed arrowhead preventing and control method, arrowhead preventing and control effect is improved, the arrowheads are basically eliminated within 3 years, and yield is improved.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and relates to a method for preventing and treating weeds in rice fields. Background technique [0002] Arrowhead mushrooms are perennial herbaceous plants with stems and corms. Due to the deep distribution of roots and stems, the biological characteristics of strong reproductive ability and wide adaptability, Arrowhead Arrowhead has a very wide distribution in my country and the world, and is widely distributed in the north and south provinces of my country, Asia, Europe and the United States. Preliminary and sporadic studies have been carried out on the biological characteristics and chemical control of arrowhead mushrooms in rice-producing countries such as Japan and South Korea. [0003] In addition to barnyardgrass and Cyperaceae weeds which are still the main weeds in paddy fields in the cold rice area, broad-leaved weeds such as Arthrophyta and Scutellaria have shown a sharp increase ...

AI Technical Summary

Problems solved by technology

[0004] Although barnyardgrass is the main weed in the cold area, the prevention and control technology has been very mature. Relatively speaking, perennial weeds such as Arrowhead are gradually increasing in the field, which seriously affects the division and panicle of rice.

At present, there are many studies on the control of barnyardgrass, Cyperaceae and other malig

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