Occurrence characteristics and scientific control of weeds in upland rice fields

Before we all know more about rice, there are actually upland rice. In recent years, more and more people have planted upland rice. The upland rice has strong adaptability, and the water needed for its growth process is basically dependent on rainfall. In the key growth period, it is necessary to water and drought in case of drought. Today, I mainly study the occurrence characteristics and scientific control of weeds in upland rice fields.

First, the occurrence characteristics of weeds in upland rice fields

First, weeds in upland rice fields have two peak periods. Malignant weeds are easy to die and resurrect. The first weed germination peak is 7-15 days after sowing, and the second one is 25-35 days after sowing, especially There are many grass weeds such as valerian, Qianjin, Matang, and foxtail, as well as sedge and broadleaf grasses such as purslane, iron leeks, and fragrant aconite.

Secondly, dry rice is generally sown with dry seeds. The seeds absorb water slowly and the emergence period is long. If the medicine is not closed, the weeds will emerge first than the rice seeds, and the weeds will be weeded at the appropriate age. The weeds are already large and the resistance to the chemicals is enhanced.

2. How to weed the grass in the dry rice field?

First of all, we must pay attention to closed weeding, and its operation method is the same as that of rice dry live broadcast. It can be used with butachlor, oxacillin, butachlor, pendimethalin, zhongdingling and other compounding agents. Bisulfuron-methyl, used before germination after sowing, the soil is kept moist before application, if it encounters rainy weather, it must be drained in time; if the best application period is due to rain, the phenomenon of "dew bud" appears in dry rice. A 60% butadiene emulsifiable concentrate with a safener can be applied. The closed rice is well done, which can reduce the number of weed emergence and reduce the pressure of subsequent weeding.

Secondly, the post-emergence stems and leaves must be weeded early, generally in the 3-4 leaf stage of the seedlings, and the weeds are used in the 2-3 leaf stage. When the weeds are larger than the seedlings, the medicine can be used in the 2 leaves of the rice. The formula of pentafluoro-cyanofluoroacetate can be selected. Rice field herbicides can be used for weeding herbicides for upland rice weeding with quinclorac, cyhalofop, oxazolamide, bispyribyl ether, etc. to control grass weeds, bentazone, benzyl (pyridinium) Sulfonated, flufenoxyacetic acid, etc. to control broadleaf grass and sedge.

Thousand gold, crabgrass, valerian and other resistant weed medication programs. In the golden foxtail and crabgrass mixed plots, you can choose to use the combination of Meifeng double-finger 033 plus chlorpyrifos or bis-oxalyl; wild carp, crabgrass, valerian mixed plot, available with Meifeng double-finger 033 plus Mixing bismuth phosphorus; resistant to thousands of gold, crabgrass serious plot, can be mixed with Meifeng double finger 033 + Meifeng doucaus or use cyhalofop-oxazolamide. Resistant horse can also choose the safer and more hostile products such as “Changshan Unconventional” in Xinchang Mountain, Hunan.

Third, apply the medicine when the soil is wet (the soil contains sufficient water), or apply it after the rain and during the rain. The soil moisture is sufficient, the dry rice and weeds grow vigorously, which is beneficial to the decomposition of the pesticides in the upland rice. The weeds absorb the liquid quickly, the conduction is fast, and the weeding effect is better; in case of high temperature and dry weather, the herbicide should be used in a little more than the rice field. To increase the amount of water, weeds are wet but do not drip, the application should be before 10 o'clock or after 4 o'clock in the afternoon to improve the control effect.

The above is all the content of today, there are many farmers who wonder why the weeding effect is sometimes not good at all. At this time, everyone can consider whether your weeding method is reasonable, weather conditions and other factors. The content of the article is reproduced in the headline number, and the agent mentioned in the article is for reference only.

For the wonderful pictures and popular comments on the method of weeding dry rice fields, you may be interested in the following recommended contents of Hui Nong. Welcome to read.

Auto Rewind Air Hose Reel

Automatic Air Hose Reel,Auto Rewind Air Hose Reel,Self Retracting Air Hose Reel,Air Compressor Retractable Hose Reel

NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.water-hose-reel.com