How to get rid of broadleaf grass in potato field
(1) rotation: reduce the density of associated weeds, change the dominant weed community in the field, and reduce the number of weeds in the field.
(2) ploughing: after ploughing the soil for many times, perennial weeds such as Ixeris angustifolia are buried in the ground, so that the weeds gradually reduce or decline, so that their growth is inhibited and the purpose of weeding is achieved.
(3) ploughing and soil cultivation: this measure not only removes weeds, but also has the functions of deep loosening, storing water and preserving soil moisture. For example, the cultivation of potato in open field is generally carried out at about 10cm of seedling height for the first time, and the second time is completed before ridge closure, which can effectively control weeds such as thistle, Niufan, paspalum grass, amaranth and so on.
(4) artificial weeding: suitable for pulling out small areas or large grasses.
(5) physical method of weeding: for example, mulching with colored plastic film, such as black film and green film, has a certain anti-weed effect.
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Cultivation techniques of Potato covered with broken Grass
In recent years, with the expansion of mechanical harvesting area of late rice and middle rice, there are more broken grass after mechanical harvesting. Covering potato with crushed grass harvested by machine, preparing the soil without ploughing, sowing without covering soil, and harvesting without digging is an effective and simple and efficient cultivation technique. Choose a good seed. Selection of Dongnong 303 and other precocious varieties, strong growth, early tuber formation, very precocious, growth period of about 60 days (emergence to harvest), strong resistance, good waterlogging tolerance. Fine ground preparation. Use the late rice harvest to plant potatoes in the future winter fallow fields, first per mu on the rice field board.
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Potato dodder damage
(host crop) potatoes, tomatoes, eggplant, chili, green onions, soybeans and other crops. (disease diagnosis) sporadic or nesting in the field. Dodder wrapped around the stem of the plant with rattan stem, twisted, sucked roots grew in contact with the potato plant and extended into the stem or petiole tissue to absorb the water and nutrients of the plant, resulting in the growth of the injured plant. The plant is short, the stem is curved and thin, the leaves are small and yellow, and the tubers are few and small. The stems and leaves of severe plants are covered with dodder, and the whole plant does not decay for long until it dies. The pathogenic dodder is Chinese dodder. The stem of dodder is slender
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