Cuscuta does not have roots or leaves, but there are serrated suction cups (or sucker roots) on the stems. It sucks nutrients by sucking roots deep into the bark, which affects the growth of the fruit seedlings. Severe seedlings can cause seedlings to die. In mountainous litchi gardens, the more common dodder seeds can be used for flowering and seeding. The flowers are small white. When the fruits ripen, they will fall off on their own. The seeds will germinate in the second year, and the embryos will be formed at one end. The young stem grows very quickly. When the fruit seedling is encountered, it is entangled with it and a sucker is produced. The stem is sucked into the stem of the fruit plant to absorb nutrients. At this time, the stem penetrating into the stone gradually became wet or shrivelled and separated from the soil. Control methods: (1) Immediately after the detection of Cuscuta, cut together with the affected part of the seedling (the ability of the cut stem of Cuscuta to develop into a new strain). Generally cut off before the opening of the dodder, must be thoroughly cut, cut stems should be burned. (2) Climbing epiphytes, such as weeds, which are "bridge hosts" are to be removed from the nursery or orchard, but also dichaoronitrile 0.5 kg/mu, or 2% to 3% pentachlorophenol sodium salt and dinitrogen Phenyl ammonium salt control. (3) An orchard with serious damage will be deeply turned every year. Seeds that fall on the soil surface of the chase seed will be deeply turned into deep soil below 3 cm, making it difficult to excavate the earth. (4) Using biological control measures, such as spraying “Lubao-No.†(a fungal preparation) on a cloudy day after rain, using 1.5-2.5 kg per mu, which can artificially promote the occurrence of anthrax death in Cuscuta. It is better to break the stems of the reeds before spraying. (5) Spraying herbicides such as ezetane, lansoline, aminopram, and ditergylamine can kill dodder seed, and can also be sprayed with 1.5% sodium pentachlorophenol and 2% fluocinolone. Or dinitroammonium salt. Spray once every 25 days for a total of 3 sprays.
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