How to prevent and cure diseases caused by high-yield planting in Shantou? The common diseases of high-yield planting in Shantou include soft rot, round spot disease, black spot disease, viral disease, anthracnose, etc. Therefore, in the process of planting steamed bread, it is necessary to prevent it in advance, discover it in time, strengthen field management, and do well in disease prevention and control measures. Wait, now Xiaobian talks about the common diseases and prevention methods in the planting process of taro.
First, the soft rot of taro
1. Main hazards of taro soft rot
a, mainly to damage the base of the petiole petiole or underground bulbs;
b. At the beginning of the petal stalk, there will be water-soaked, dark green, and no obvious edge lesions, which will then slowly spread to the internal structure of the posterior petiole, which will make the posterior petiole tissue brown and rot, and some will turn yellow and fold. inverted;
c. When the bulb is infected with soft rot, it will slowly rot, so that the infected part will quickly soften and rot. It is known that the whole plant is withered and the infected part will have a foul smell.
2, Shantou soft rot disease prevention and treatment methods
a. When planting steamed bread, choose strong disease resistance, such as red bud;
b. Taro cultivation requires 2-3 years of rotation, while strengthening field management and applying fully decomposed organic fertilizer;
c. When the diseased plant begins to rot or ferment occurs in the water, drain the field in time;
d. Spray 30% copper oxychloride suspension 600 times solution after sun drying, or spray 72% agricultural streptomycin sulfate soluble powder 3000 times solution, 1:1:100 Bordeaux mixture;
e. Apply 75-100L of liquid per acre, apply the liquid once every 10 days, and apply it twice or three times continuously.
Second, the taro round spot disease
1. Main hazards of taro round spot disease
a, mainly damage the leaves, will start from the edge of the leaf or the periphery of the leaf surface;
b. In the early stage of round spot disease, there will be small brown water-stained spots on the leaf margin or leaf surface, and then slowly spread into semi-circular, nearly circular or amorphous yellow-brown to gray-brown necrotic lesions;
c. The leaf edge or leaf surface damaged by the round spot disease has a concentric wheel pattern, and there is a relatively wide pale yellow halo at the periphery;
d. In the later stage of the round spot disease, small black spots will occur on the lesions. In a dry environment, the lesions will rupture and perforate.
2, Shantou round spot disease prevention and treatment methods
a. Remove the diseased fruit and the sick body in time, and bring out the planting land for centralized burial or incineration;
b. Carrying out rotations of taro and non-solanaceae crops for more than two years;
c. In the early stage of round spot disease, spray 75% chlorothalonil WP 600 times solution, or 50% captan WP 500 times solution, or 77% copper hydroxide wettable powder 400-500 times solution, or 50% wettable powder vinyl nucleus nucleus wettable powder, or 50% chlorhexidine WP 1000 times solution, or 80% Xinwansheng WP 800 times solution;
d. Spray once every 10 days and spray two or three times in a row.
e. If it is cultivated in the greenhouse, in the initial stage of the round spot disease, spray 5% powder plus ruinong per acre, or 7% powder anti-mildew, or 5% powder of mold-killing 1kg, or use 15% grams The fungus powder 200g was treated.
Third, taro black spot
1. Main hazards of taro black spot
a, the main damage to the leaves, the leaves that are damaged in the early stage will appear light yellow necrotic small points, and then slowly spread to near "fish-shaped" lesions;
b. In the later stage of taro black spot disease, a dark brown mold layer will be produced on the lesion. Seriously, many lesions will appear on the leaf, and the lesions will connect to make the leaves die.
2, Shantou black spot prevention and treatment methods
a, do a good job of seed dressing, you can use 50% of the weight of 0.3% of the phlegm hyacinth powder or 50% of the nutrient WP powder seed dressing;
b. After harvesting the steamed bread, clean the garden in time to remove the sick body;
c. In the early stage of taro black spot, spray 50% phorhin WP 1000-1500 times solution, or 75% chlorothalonil WP 600 times solution, or 68% Jingjialing Mn Mn granules 300 Double solution, or 64% anti-virus WP 400 times solution, or 70% ethyl phosphine·manganese-zinc wettable powder 500 times solution, spray once every 10 days, and spray two or three times continuously.
Fourth, taro virus disease
1. The main hazards of taro virus disease
a, the vein leaf veins will appear chlorotic yellow spots, and then slowly spread yellow-green interflowered leaves, making the plant dwarf;
b, the new leaves will appear feathery yellow-green markings or blade twist deformities;
c. Plants with serious viral diseases will have a light brown color, less tillering, and less bulb degradation.
2, taro virus disease prevention and treatment methods
a. In the early stage of the disease of taro virus, spray the anti-virus inducer “NS-83†100 times solution to improve the antiviral ability of taro;
b. In the early stage of the disease of taro virus, it can be controlled by chemicals. It can be sprayed with 1.5% phytotoxic emulsion 1000 times solution, or 20% virus A wettable powder 500 times solution, or 20% virus Ning water solvent 500 times solution, or Morpholin hydrochloride hydrochloride, or 15% virus Becker wettable powder 500 times solution;
c. In the early stage of taro virus disease, spray foliar nutrient +0.05%-0.1% black soap or soap, or 5% toxic water clearing agent 300-500 times solution, or spray NS-83 anti-reagent l00 Double liquid or 1.5% phytopathological l000 times solution, spray once every 10 days, spray two or three times in a row, or spray several times, which is beneficial to promote the growth of taro plants and reduce the incidence.
Five, Shantou anthracnose
1. The main hazards of anthracnose
a, mainly harm the leaves, it will also harm the bulbs and petioles when it is serious;
b. Water-stained dark green lesions will appear in the early stage of leaf infection, and then slowly turn into yellow-brown to dark-brown near-round lesions;
c. When the humidity is high, black dots or vermilion small liquid spots will appear on the leaf lesions;
d. When dry, the leaf lesions are shrunk into a parchment-like shape, which is easily broken or partially peeled off into leaf perforations;
e. The lesions of the bulbs are round, and after peeling, the diseased tissue is yellowish brown and has no odor.
2, Shantou anthracnose prevention and treatment methods
a. Select a variety with strong disease resistance, soak the seeds for 10 minutes with 58-60 degrees warm water or 25% charringer 600 times before planting;
b. Choose a plot with flat terrain and good drainage performance, and apply fully decomposed organic fertilizer;
c. Strengthen field management, scientific watering, rational fertilization, not excessive application of fertilization or partial application of nitrogen fertilizer, and timely clearing ditch drainage and dehumidification in the rainy season;
d. Spray 30% copper oxychloride suspension plus 75% chlorothalonil (1:1) 800-1000 times solution, or 70% thiophanate plus 75% chlorothalonil before the onset of taro anthracnose (1: 1) 1000-1500 times liquid, or 50% moisturizing powder 1000 times liquid, 40% polysulfur suspension 600 times liquid, or 80% anthrax fumei wet powder 600-800 times liquid, or 25% charcoal Wet powder 500 times liquid, or 50% spray Shibao suspension 800-1000 times liquid, or 25% should be suspended 1000 times liquid spray, spray every 7-15 days, spray two or three times continuously .
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