Eichhornia crassipes is a perennial floating plant, plant height 30 ~ 50cm, fibrous roots developed, hanging water. Extremely short stems. The leaves extend straight from the tufted, obovate round or ovoid, full bright green and shiny, thick, petiole length, the lower part of the petiole swells like a gourd-shaped spongy balloon. Scallops are well developed and dangling in water. Single leaves clumping at the base of short-stemmed stems, 6-12 leaves per plant, leaves oval, smooth leaves; petiole in the lower part of the balloon base with a balloon shaped like a gourd with cut-like sepals. Flower stems solitary, spikes, and 6-12 flowers, perianth 6-cleft, purple-blue, one lobe larger, with bright yellow spots in the center. Governance methods: 1, the use of crab control. When the water temperature reaches 15°C in April-May, the water hyacinth will begin to breed. At this time, the use of river crabs for water hyacinth roots, new stems of the feeding habit, in a pond with more water hyacinth put a certain amount of crab or large eye larvae, can effectively control the growth of water hyacinth, but also improve the crab production and survival rate. 2, artificial salvage. Manual salvage is a primitive method, but it works. The key is to determine the time of salvage. Before the water hyacinth begins to multiply, or after the pesticides have been applied, the salvage will have a multiplier effect. In particular, artificial salvage is combined with chemical control. When the herbicide is used to make the water hyacinth wither, it is salvaged and the effect is very obvious. 3, chemical control. Comparing the control effects of four herbicides (gracerin, glyphosate, bensulfuron-methyl and clomazone) on water hyacinth shows that the effect of Gramoxone is most significant, followed by glyphosate and bensulfuron-methyl. Ethocaproteren has a certain inhibitory effect, but it does not have a lethal effect. In addition, Gramoxone has a certain lethal effect on the natural enemies of water hyacinths, and glyphosate has no direct effect on their adult worms, eggs and larvae. 41% BIOPORCE anti-water hyacinth antibacterial effect is rapid, the effect is better, the effective period is longer, no adverse effects on aquatic animals. 4, comprehensive management. In the strategy of comprehensive management, water hyacinth can be stored on one side of the river to preserve the population of the forelegoptera, and spraying the herbicide on the other side can achieve the effect of comprehensive treatment. Directly spraying herbicides on water hyacinths that are like weeds, Roundup can effectively control the growth of water hyacinth, and it can retain a certain population of weevil, but the amount of Roundup should be appropriate. Selecting the dose that can effectively inhibit the growth and population reproduction of water hyacinth plants, and in the short term it is difficult to kill the plants, is the key to maintaining the existence of the population of water hyacinth. With this method, a very significant control effect can be obtained as long as a normal amount of l/10 Roundup formulation is used. This will largely avoid the environmental and cost issues caused by the over-application of Landa. Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com
Eichhornia crassipes integrated control method