Control measures of Lily Diseases
Prevention and control of epidemic disease
The main results are as follows: (1) the use of high box deep trench or ridging cultivation requires that the border surface should be flat in order to facilitate the elimination of the water system, dig out the diseased plants as soon as possible, burn them or bury them deeply.
(2) adopt the technology of formula fertilization and appropriately increase the application of potash fertilizer to improve the disease resistance.
(3) spraying 250 times of 40% triethyl aluminum phosphate wettable powder or 58% metalaxyl and manganese zinc wettable powder, 64% poison alum 500 times, 72% DuPont Kelu 800 times.
Prevention and control of gray mold
The main results are as follows: (1) the healthy disease-free bulbs should be propagated, and the field or greenhouse should be ventilated and transparent, so as to avoid planting too dense, promote plant health and increase disease resistance.
(2) remove the diseased plants and burn them in time in winter or after harvest, remove the diseased leaves and flowers in time, so as to reduce the source of bacteria.
(3) at the initial stage of the disease, 30% basic copper sulfate suspension 500 times or 36% thiophanate methyl suspension 500 times, 60% Fangmaibao 2 water-soluble powder 700 times 800 times, 50% Sukeling wettable powder 2000 times, 50% propofol wettable powder 1000 times 1500 times. In order to prevent drug resistance, rational rotation and alternate use should be advocated and drug use should be stopped 3 days before harvest.
Control of bacterial soft rot
The main results are as follows: (1) choose the land with good drainage to plant lily.
(2) if necessary, spray 30% Ludebao suspension 400 times or 47% Garinon wettable powder 800x, 72% agricultural streptomycin sulfate soluble powder 4000 times.
Prevention and control of base rot
(1) mature organic fertilizer can be applied to inhibit harmful microorganisms in the soil.
(2) reasonable rotation.
(3) remove the diseased plant in time.
(4) maintain ventilation to avoid high humidity and overheating.
(5) seed ball disinfection, soaking seeds with 40% formalin 120 times solution for 3.5 hours, the control effect is obvious.
(6) spraying 36% thiophanate suspension 500 times or 58% metalaxyl, manganese zinc wettable powder 500 times or 60% Fangmaibao 2 water soluble powder 800ml 1000 times.
Prevention and treatment of Lily virus
The main results are as follows: (1) the bulb of healthy plant should be selected for propagation, and the disease-free seed land should be set up if possible, and the diseased plant should be removed in time.
(2) spraying 1500 times of 10% imidacloprid wettable powder or 2000 times of aldicarb ultra-fine wettable powder in time during the growth period to dig out virus-transmitting aphids and reduce the spread of the virus.
(3) at the initial stage of the disease, spray 20% Dukexin wettable powder 500 times or 0.5% antiviral agent No. 1 500 times, spray once every 10 days, 3 times in a row.
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Lily virus disease (lily symptamless virus)
The common lily virus diseases are Verticillium wilt and mosaic. There are no special disease spots on the verticillium wilt leaves, the whole plant is yellowish and the internodes are shortened. The plant is dwarfed, and the leaves are yellowed and atrophied. Irregular light green mottles are produced on the mosaic leaves, and then the small light green parts are connected and enlarged, forming slender yellow spots along the veins, and later slightly sunken, turning yellowish brown to reddish brown. The virus overwintered mainly in the bulb and became the source of infection at the beginning of the second year, and the reinfection in the field was mainly caused by aphids. There are many diseased bulbs, dry weather and aphids.
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The main epidemic factors of Lily Diseases and the skills of Integrated Control
First, symptoms: on leaves, stems and bulbs. The leaves are susceptible to disease, causing them to wither. The initial leaf tip turns brown, the length 1-2mm, and then gradually aggravates, the disease spot expands into a nearly triangular, thinning, dry and withered shape, with cloud patterns on it. The length of disease spot is generally 17-28mm, the width is 5-8mm, the maximum length of disease spot is 56mm, the width is 12mm, and finally the leaves die, and some of them occur at the leaf edge, which is semi-oval brown disease spot, which can also lead to leaf death. Ground
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