Exchange of Experiences (1 July 2021)
Amaranth, woody Amaranth, Euphorbia family. The leaves are opposite, the leaf margins are jagged, and the base of the stem tends to be lignified after four-leaf age, which is one of the common weeds in soybean fields and dry direct rice fields. In recent years, due to the single use of herbicides in the production, the resistance of amaranth has been continuously enhanced, and because of its fast woody speed at the base of the stem, it is not easy to absorb herbicides, and it is very difficult to produce chemical control.
In view of the prevention and control of amaranth, (the author) comprehensively borrowed the experience of various places, and listed several methods of prevention and removal of dry direct rice fields (amaranth) as follows, which are only for the reference of the majority of growers in production. ↓↓↓
Control method:
(Amaranth)
First, drought direct rice field amaranth, in the production of prevention and removal, prevention is more important than elimination. In combination with the control of other weeds before the seedlings after sowing the rice, it can be used with "butyrosamine. Oxazone "+ pyrazulfuron for blocking;
(Amaranth in juvenile age)
Second, the juvenile stage of Amaranth ↑↑ (see figure), can be removed before the 3-leaf and 1-heart stage of rice seedlings by "chlorofluoropyoxyacetic acid + herbic pine". At this time, the amaranth seedlings are tender and easy to absorb the drug and the seedlings are small and easy to prevent, and the above agents are relatively safe for rice;
(Amaranth in older age)
Third, for the elderly amaranth ↑↑ (see figure above), it is relatively difficult to prevent and remove. At this time, the base of the amaranth stem has tended to be lignified, and the systemic herbicide is difficult to control, but its leaf tips are still relatively tender. At this time, it can be prevented by a combination of suction and touch killing. For example: "chlorofluoropyroxyacetic acid< systemic > + herbicone + pentafluorosulfonamide + dimethyl tetrachlorosal sodium salt < touch killing >" to remove it. However, in practical application, it is necessary to pay attention to grasping the age of rice seedlings above 3 leaves and 1 heart, avoiding the use of high temperatures around noon, and covering the shallow water layer with the standard of rice heart two days after the medicine;
(Amaranth after lignification)
Fourth, for the lignification of amaranth ↑ ↑ (see the picture above), chemical control is more difficult, and most of the production is manually removed. If a large number of occurrences occur, manual operations are difficult to complete, and chemical agents can be remedied after 3 p.m. on cloudy or sunny days above the 4 to 5 leaf stage of rice. Generally, "dimethyl tetrachlorosal sodium salt< touch killing > + chlorofluoropyroxyacetic acid < absorbed > + acecarboxylic fluoroherather < touch killing reduction >" for prevention, but "acetafluorofensole" and "dimethyl tetrachloride" are touch-killing herbicides, improper use, will have burning spots on rice leaves, and in severe cases, some dead seedlings will be caused. Therefore, in the production of a small area of testing, and constantly adjust the ratio of agents, until it is relatively safe to use a large area.
↑↑★ Special reminder ★ of the above method of preventing the removal of amaranth, and comprehensive from various large planters and agricultural distribution units successful examples, is the exchange of experience, if it is used, please carefully test, so as not to bring you losses!