-
What are the control methods for black spot disease in chrysanthemums?
How do you control black spot disease in chrysanthemums? Please note that the pathogen is Septoria chrysanthemella. Also known as brown spot and leaf blotch. It is a serious disease of chrysanthemums and occurs everywhere. Symptom characteristics: on infected leaves, purplish-brown spots of round, oval or irregular shape and varying size first appear, and later...
-
What are the methods for preventing and controlling pests and diseases of jujube trees in autumn and winter?
Please introduce the methods for preventing and controlling pests and diseases of jujube trees in autumn and winter? Detailed operation methods would be best. For the methods for preventing and controlling pests and diseases of jujube trees in autumn and winter, you can refer to the following methods: 1. Clean the orchard: Pests and diseases such as jujube rust, green plant bug, and jujube slug moth overwinter in fallen branches, leaves, or weeds under the trees. Therefore, after the jujube trees shed their leaves...
-
Desert Rose Disease Prevention and Control Tips: Endless Blooms, Elegant and Charming
Desert rose blooms are vibrant and deeply loved by people. During care, you may encounter disease problems, such as leaf spot and soft rot. How should these be prevented and controlled? Below, the editor will take everyone to take a look! Desert rose disease prevention and control methods...
-
What are the control methods for Angelica sinensis pests and diseases?
How to control Angelica sinensis pests and diseases? Please give a detailed introduction. For pest and disease control in Angelica sinensis cultivation, you can refer to the following methods: (1) Root rot (Mako disease): mid-April, mid-June, early September, and early November after transplanting are the peak periods of the disease. It damages the roots, and an abundance of soil-dwelling pests favors its occurrence. Control methods: (1) Use 391...
-
What are the control methods for Angelica sinensis pests and diseases?
How do you control diseases and pests in Angelica sinensis? Please explain the methods. Here are several control methods for Angelica sinensis pests and diseases for reference: Root rot: soak the seedlings in 1:1:150 Bordeaux mixture, sterilize and kill insects in the soil: burn and smoke the soil more in the seedling bed. Brown spot: pay attention to field hygiene, promptly remove diseased leaves, and in the middle and late stages use 1:1:150...
-
How should late-stage premature senescence in cotton be managed to prevent and control it?
How can management prevent and control late-stage premature senescence in cotton? Please provide methods. To prevent and control late-stage premature senescence in cotton, you can refer to the following methods: 1. Fertilizer and water management: According to the condition of the cotton plants, the climate and the soil conditions, apply the flowering and boll fertilizer heavily; if the flowering and boll fertilizer is insufficient, then apply a top-dressing fertilizer. After mid-August, if the maximum field water-holding capacity is below 60%, and in early September below 55%, water promptly to promote fertilizer with water and ensure the fertilizer effect is exerted in time. If cotton premature senescence is caused by soil potassium deficiency, while applying base fertilizer, increase the application of potassium sulfate or potassium chloride by 5-10 kg during the seedling and bud stages. When fertilizing, be sure to plow deeper than 20 cm, apply the fertilizer at the plow bottom, achieve deep fertilizer application, promote root penetration downward, reduce fertilizer loss, and improve fertilizer use efficiency. During the flowering and boll-setting stage, if drought occurs, water lightly, carefully clean the furrows and beds to prevent waterlogging again; if waterlogging occurs, drain promptly.
-
How to prevent and control cotton boll rot? Do this in hot and humid weather
How to prevent and control cotton boll rot in hot and humid conditions? Please explain the methods. Cotton boll rot can be prevented and controlled by referring to the following methods: 1. Rational fertilization: apply more organic fertilizer and phosphorus-potassium fertilizer, apply nitrogen fertilizer in appropriate amounts, prevent excessive vegetative growth of cotton plants, reduce canopy closure in the cotton field, and improve ventilation and light penetration. 2. Timely drainage: for low-lying...
-
Why do cotton bolls rot? How to prevent and control cotton boll rot?
Why do cotton bolls rot? How to prevent and control cotton boll rot? Please give an introduction. Cotton boll rot occurs to varying degrees almost every year. Therefore, on the basis of understanding the conditions and causes of cotton boll rot, comprehensive measures should be taken for prevention and control, striving to reduce losses to a minimum. 1...
-
Which diseases need to be prevented and controlled in cotton cultivation?
What diseases need to be prevented and controlled when growing cotton? Please give an introduction. Cotton has different diseases at each stage of growth. The following introduces the diseases at the cotton seedling stage and their prevention and control for reference: 1. Seedling stage disease - damping-off (seedling death). After cotton seedlings emerge, yellow-brown lesions appear at the base of the stem (where it meets the soil surface),...
-
How are pests controlled during cotton cultivation?
How do you control pests when growing cotton? Please explain the methods. The following methods can be used to control pests when growing cotton: 1. **Integrated control of cotton field spider mites** The cotton region is one of the areas with the most severe occurrence of cotton spider mites nationwide. In particular, after plastic film cotton planting, conditions were created for cotton spider mites to enter cotton fields early, ...
条件筛选