-
What fungicide works well to control Sclerotinia rot
For Sclerotinia rot, generally apply 4-5 kg of 50% carbendazim wettable powder per mu, mix thoroughly with an appropriate amount of dry soil and spread it on the bed surface, then rake it into the soil, which can reduce the primary infection source. At the early flowering stage, you can use a 500-fold dilution of 70% mancozeb wettable powder; a 1000-fold dilution of 70% thiophanate-methyl, 50% carbendazim or 40% validamycin wettable powder to spray the stem base, old leaves and ground surface of the plants; start applying the fungicide at the early stage of disease onset, once every 7-10 days, and 2-3 consecutive sprays can achieve effective control. <p style="text-align:center"></p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>1. What symptoms does Sclerotinia rot have?</strong></span></p> <p style="text-indent:2em;">At the seedling stage, red-brown spots appear on the affected stems and leaf stalks, and later they expand and turn white. If the disease occurs at the leaf stage, the leaf margins of the old leaves at the base of the plant are the first to be affected.</p> <p style="text-indent:2em;">The lesions initially appear dark blue-green and water-soaked, and later expand into round or irregular large spots. The center of the lesion is yellow-brown, and the surrounding area is light yellow. Sometimes the outline pattern on the lesion is relatively obvious. In dry weather, the lesion will crack and perforate; in rainy weather, the lesion will expand rapidly and the whole leaf will become rotten.</p> <p style="text-indent:2em;">If the disease occurs on the stem, the pathogen generally appears on the middle and lower parts of the main stem. The lesion initially appears light brown and water-soaked, and later gradually develops into an oval shape. Under humid conditions, the lesion expands rapidly. In the late stage of disease development, the cortex splits longitudinally, and the root stem becomes extremely easy to break.</p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>2. What is the disease pattern of Sclerotinia rot?</strong></span></p> <p style="text-indent:2em;">The pathogen of Sclerotinia rot is Sclerotinia sclerotiorum. The sclerotia are round or irregular in shape, white at first and black later, and the interior of the pathogen is grayish white. The pathogen has a very wide host range. Besides rapeseed, it also affects many other crops such as sunflower and carrot.</p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>3. How to control Sclerotinia rot?</strong></span></p> <p style="text-indent:2em;">1. Agricultural control:</p> <p style="text-indent:2em;">(1) Develop disease-resistant varieties: cultivate high-yield, disease-resistant improved varieties according to local conditions.</p> <p style="text-indent:2em;">(2) Seed disinfection: through screening, chemical seed soaking and other methods, eliminate sclerotia and kill bacteria on the seed surface, and sow disease-free seeds.</p> <p style="text-indent:2em;">(3) Timely remove diseased residues: after harvesting the crop, promptly burn and clear the diseased residues in the field and beside the roads to reduce the source of the pathogen.</p> <p style="text-indent:2em;">2. Chemical control:</p> <p style="text-indent:2em;">Use special-effect fungicides such as prochloraz and Shibaike for protective treatment. The best application period for prochloraz is from the full flowering stage to the late full flowering stage.</p> <p style="text-indent:2em;">The above is a detailed introduction to what fungicide to use for Sclerotinia rot and its disease symptoms. I hope it is helpful to everyone.</p>
-
What pesticide is effective for controlling walnut black rot?
For walnut black rot, use Bordeaux mixture at a 1:1-2:200 formula, 35% basic copper sulfate suspension concentrate at 400-500 times dilution, 35% basic copper sulfate (Lüdebao fungicide) at 300-400 times dilution, DT fungicide at 3000-4000 times dilution, or agricultural streptomycin at 100-120; spray the first time in mid-month, and thereafter
-
What pests is triazophos mainly used to control?
Triazophos can be used on crops such as rice, cotton and vegetables to control pests such as stem borers, rice planthoppers, aphids, cotton red spider mites, cabbage caterpillars, Lygus bugs, leek maggots and cutworms. Among the rice pests, the main ones are the striped stem borer, the yellow stem borer, the rice leaf roller and the rice gall midge. Among the cotton pests, the main
-
What to Do About White Fruit Disease in Mulberries? A Detailed Guide to Prevention and Control Methods
Mulberry white fruit disease is the common name for sclerotinia disease and is the main disease of mulberry fruit. When the disease is severe, it can cause a complete loss of the mulberry fruit harvest. The pathogen is Sclerotinia sclerotiorum. The primary sources of infection for sclerotinia disease are mainly soil mixed with sclerotia, diseased residual branches and fallen leaves, and compost. Under suitable temperature and humidity
-
A Detailed Guide to Common Pests and Diseases of Trichosanthes kirilowii and Their Control Methods
Trichosanthes kirilowii, also known as yaogua or gualou, is a relatively good Chinese medicinal herb. Its roots, stems, leaves, seeds, and fruit rind can all be used as medicine, and it has a very wide range of applications. During the cultivation of Trichosanthes kirilowii, pest and disease infestations are very likely to occur. Let us take a look below at the common
-
What causes hollow heart in sugar beet, and how should it be prevented and controlled?
Hollow heart often occurs during the cultivation of sugar beet, seriously affecting the quality of the sugar beet and bringing economic losses to farmers, so measures must be taken to prevent and control this condition. Here is an introduction to the causes of hollow heart in sugar beet and the prevention and control methods. 1. Hollow heart
-
How to Prevent and Control Black Head Disease in Enoki Mushrooms and Tips for Killing Pests
The enoki mushroom (Flammulina filiformis) is a fungus similar to the daylily bud, and its artificial cultivation technique is not complicated. As long as environmental conditions are well controlled, stable yields can be achieved. However, if management is improper, it may develop diseases such as black head disease. Here we introduce to you the prevention and control methods for black head disease in enoki mushrooms.
-
Technical Plan for the Prevention and Control of Major Tea Plant Pests and Diseases (2019 Edition)
The pests and diseases occurring in tea gardens nationwide mainly include the tea green leafhopper (small green leafhopper), the black citrus whitefly, the grey tea looper, the tea looper, the tea tussock moth, the pink tea rust mite, the coffee red mite, the horned leaf beetle, the tea lace bug, the tea black tussock moth, the tea yellow thrips, the tea stick thrips, as well as
-
The Complete Guide to Ant Control Methods: Solve Your Ant Problem with Ease
For ant control, you can use a 500-1000x dilution of 90% or higher trichlorfon stock solution, a 1000-1500x dilution of 50% dichlorvos emulsifiable concentrate, a 2000-3000x dilution of 80% dichlorvos emulsifiable concentrate, or a 0.1% pyrethrin kerosene solvent spray. If you prefer not to use chemicals, you can mix baking soda with powdered sugar and plant essential oils, then
-
Complete Guide to Longhorn Beetle Control Methods: Teach You How to Effectively Eliminate Longhorn Beetles
Longhorn beetles can be controlled using four methods: utilizing natural enemies, physical control, chemical control, and forestry control. Among these, physical control and chemical control are the more common methods in daily life. Physical control mainly uses methods such as manual capture, garden cleanup, and water immersion, generally carried out after rain
条件筛选