The fragrant aconite consists of underground tubers, rhizomes, bulbs and above-ground stems and leaves, and can be propagated by tubers, rhizomes, bulbs and seeds. In the weed growing season, seedlings can be emerged in 2 to 3 days. When the conditions are suitable, the seeds and rhizomes can germinate and new plants or tubers are formed, and the new tubers sprout young grasses, one by one, and grow continuously. If it is not root control, even if the above ground part is gone, the underground part will continue to grow, and the height of the original plant can be reached in about 7 days.
Because of the special hard-to-remove tuber roots, the key to controlling the aconite is to kill the roots. The best time to control the scented aconite is before the flowering and sputum, because the weeding level of the weeds is high after the convulsion and flowering, and the conduction and absorption ability is poor. At this time, a large amount is needed to have a better control effect.
The agents suitable for controlling the aconite in the cotton field are: (1) trifluridazine. Syngenta developed and developed the cotton field. When the cotton seedlings are 20-30 cm, the active ingredient is 1.5-2 g/mu, and the water is 30 kg. The oriented semi-directional spray has little or no phytotoxicity. The effective component of the amount of more than 2.5 grams of whole field spray to the top of the cotton plant leaves, weak cotton seedlings, bad weather conditions are easy to produce phytotoxicity. (2) Glyphosate isopropylamine salt. During the vigorous growth period of cotton, the aconite is mainly caused by tuber growth, and the density of weeds is large. It can not be sprayed and weeded. It can be used as a liquid medicine by artificially spraying 41% of glyphosate isopropylamine salt and 200 ml of water. Apply a brush to the stems and leaves of the fragrant aconite to make it absorb and conduct, and the tuber is rotten in the ground and extinct.
In actual production, a combination of chemical control and agricultural control can be adopted to achieve the effect of eliminating mandarin aconite to save manpower and material resources. The agricultural control methods are: one is the plot where some of the fragrant aconites are concentrated and the tuber is the main one. Combine the cultivated land or the cultivating loose soil, manually pick up the tubers of the aconite in the soil, bring out the field for drying or medicinal; It is the flowering and seeding stage of the fragrant aconite from July to August (before the seed is immature), the whole plant is cut or the stems and inflorescences of the aerial part are cut off, the seed is reduced, and the seed is reduced to reduce the damage.
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