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(2) Use disease-free, alfalfa and non-mechanical injury bulbs as seeds to reduce bacteria and mange sources.
(3) Burn the litter, pests and debris in the field and reduce the source of diseases and insects. The organic fertilizer is applied to the lower layer of the soil after being fermented by heaping.
(4) Deep ditch sorghum, drainage ditch, control of soil moisture.
(5) Immersion Disinfection eliminates worms. Before sowing, use 20% broom net wettable powder 4000 times liquid plus 70% thiophanatesine wettable powder 1000 times liquid soak bulb for 3-5 minutes (temperature above 30°C, time shortened to 3 minutes), sterilization Hey.
(6) Chemical control in Datian. According to experiments and inspections, Datian chemical control is very important in prevention and treatment. When sowing, use 10% zinc and phosphorus-containing granules per acre, add 5 kg of 2% dexamethasone wettable powder or 0.5 kg of 50% thiophanate-methyl WP, and make it into the soil for sowing. Ditch, then sowing, cover soil; in mid-April, use 20% broom net wettable powder 3000 times or 40% water phosphoroin emulsion 1500 times liquid plus 5% bacteria poison water agent 300 times or add 50 % Dixon WP 700 times. Litchi need to be carried out when there is no water in sunny or cloudy soil, and it is necessary to loosen the topsoil layer before application. Otherwise, the effect is poor and the normal growth of lily is affected. A total of 2-3 times a bowl, each interval of 15-20 days. The spraying protection was started from the emergence of the lily, applied 15 days or so, and sprayed 6-7 times in succession. In addition, 50% mancozeb WP can be used 700 times; 75% chlorothalonil wettable powder 700 times.
(1) Rotation of crops for three years, when planting lily with slope, it is necessary to grow from the bottom to the top to reduce the spread of germs.