![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Shallow water is also known as rice paddy. Planting lotus roots in rice fields is not only a small investment, easy to manage, but also has good economic benefits. However, the expansion of high-quality planting areas has made pests and diseases more serious. China's pesticide network Xiaobian finishing related pest and disease control measures for your reference:
First, the main diseases (Lianhua Corruption, brown spot, black spot)
(1) Lotus root disease is also called wilt disease, also known as lotus root. The main symptoms are the damage to the underground stems of lotus roots causing decay. When severe, the whole field is burnt.
Prevention period and measures: 1. Field selection. The water and dry fields are used for field work, and the seriously ill fields are rotated for 2 to 3 years. 2. Remove the source of the disease. The diseased plants were found to be removed in time. 3. Soil disinfection. Putian should be deep-turned, and 100~150 kg of lime should be applied to 667m2 for soil disinfection. 4. Seed disinfection. Before planting, use thiophanate-methyl 70% WP800~1000 times solution, chlorothalonil 75% WP800~1000 times liquid spray to suffocate, cover the agricultural film for 24 hours, dry and plant. 5. Chemical control. In the early stage of the disease, timely application of drugs. 1 Use chlorothalonil 75% WP500g, mix 30kg of fine soil, and evenly sprinkle it into shallow paddy field. 2 pesticide manufacturers recommend 1:1:200 Bordeaux mixture, carbendazim 80% WP600~800 times solution, mancozeb 80% WP600~800 times solution, thiophanate-methyl 70% WP600~800 times solution Spraying and controlling the stems, spraying once every 7 to 10 days, even spraying 2 to 3 times, have certain effects.
(2) The main symptom of lotus root brown spot disease is the production of light brown lesions on the lotus leaf, causing the diseased leaves to dry partially.
Prevention period and measures: Precautionary measures in the early stage are the same as lotus root spoilage. 1. Reasonable close planting. Appropriately control the cultivation density, ensure the ventilation and light transmission of Putian, appropriately increase the application of phosphorus and potassium fertilizer, and improve the disease resistance of plants. 2. Chemical control. In the early stage of the disease, spray treatment with carbendazim 80% WP800~1000 times solution or chlorothalonil 75% WP800~1000 times solution.
(3) Lotus black spot disease, also known as brown streak disease, occurs only on the leaves. The main symptom is the appearance of dark spots on the leaves. In severe cases, the lesions are connected and the leaves are yellow.
Prevention period and measures: Precautionary measures in the early stage are the same as lotus root spoilage. 1. Remove the source of the disease. The diseased leaves were found, and the diseased leaves were removed in time; the leaves of the diseased plants in the field were cleared in winter and burned intensively. 2. Chemical control. In the early stage of the disease, spray treatment with methyl thiophanate 70% WP800~1000 times solution, senseng zinc 65% WP600~800 times solution or 1:1: (160~200) Bordeaux liquid agent, every 10 days or so Spray once, even spray 2~3 times.
Second, the main pests (S. cerevisiae, lotus root tube mites, lotus root roots, golden flower worms, snails)
(1) The larvae of Spodoptera litura harm the lotus root's standing load, and the leaves are nicked to leave only the main vein.
Prevention period and measures: 1. Manual control. The young larvae have the characteristics of cluster damage, and the method of artificially removing the worm leaves can greatly reduce the harm. 2. Chemical control. Before the larva 3 years old, the bio-pesticide avermectin 1.8% EC, emamectin benzoate 1% EC or deltamethrin 2.5% EC2000~3000 times liquid, indoxacarb 30% WG3000~4000 Spraying prevention and control, such as doubling solution, chlorpyrifos 40% EC, bifenthrin 25 g / liter EC1500~2000 times solution.
(2) The leaves of the lotus roots are slightly yellow and white, and the leaves are curled and curled, and the stems and leaves are yellow.
Prevention period and measures: 1. Biological control. Protect the natural enemies of aphids such as ladybugs and treat insects with insects. 2. Chemical control. Spray control with imidacloprid, acetamiprid, chlorpyrifos, and pymetrozine.
(3) Lotus roots Golden flower worms, also known as lotus roots, are commonly known as lotus roots, mantles, and leeches. The larvae are harmful in the roots and stalks of the lotus roots. The affected areas are dark brown spots, the roots are black, the lotus leaves are yellow, and the growth of the stalks is blocked.
Prevention period and measures: 1. When turning over the ground, apply 100 kg of quicklime per 667 m2, and spray it with fenvalerate 20% EC200 g. 2. Spread the chlorpyrifos, phoxim granules and rapeseed cake powder evenly, and then plow the fields to make the pesticides mixed into the soil for prevention and treatment. 3. Biological control. Stocking jaundice and loach to prevent and control.
(4) The snails mainly feed on the young stems and leaves of lotus roots.
Prevention period and measures: uniform treatment with tetra-acetaldehyde 6% granules.
The pesticide network reminds everyone that the same piece of land should not be used for many years, and rotation should be taken to reduce the amount of soil bacteria. Generally suitable for rice rotation.
Natural Incense Cones,Backflow Incense Cones ,Incense Cones,Different Color Incense Cones
Xinhui Gangzhou Flavors&Fragrance Co.,Ltd , http://www.xhgzff.com