-
How to control sorghum aphids? These methods you need to know
How to control sorghum aphids? Please give me some guidance. The control methods for sorghum aphids can refer to the following: ① Detect early and control early: when aphids occur in spots and patches, eliminate them promptly to prevent spread. In the early stage, you can simply wipe off the aphids by hand; when severe, use pesticides for control. ② Chemical control methods: A. Dusting: at the seedling stage, use 2.5 kg of 1.5% dimethoate powder per mu; 2 to 3 kg of 1.5% 1605 powder. B. Spraying: use 50 to 70 L of a 1500-fold dilution of 40% dimethoate emulsifiable concentrate per mu; 500 mL of 25% methamidophos emulsifiable concentrate, add 500 to 750 L of water, with a per-mu dosage of 75 L (Note: this pesticide is a highly toxic pesticide, strictly follow the operating procedures, stop using it 28 days before harvest, do not mix it with alkaline pesticides, and wash the equipment clean after use); 0.01 to 0.02 kg of 50% pirimicarb wettable powder, diluted with 30 to 50 L of water (do not let it contact human skin, and do not mix it with strong acids or strong alkalis); 20 mL of 30% omethoate emulsifiable concentrate, diluted with 75 L of water, spray the plants during the occurrence period. C. Smearing on plants: use a 50- to 100-fold dilution of 40% omethoate emulsifiable concentrate, and smear it on the 3rd to 4th nodes at the base of the sorghum (about 17 cm). In the later stage, when the plants age, it is not suitable to use. D. Fumigation to kill aphids: use 0.2 to 0.3 kg of 5% 3911 granules per mu, mix with 2 kg of sand and soil, and apply the pesticide to one ridge every 12 ridges, which can fumigate and kill aphids.
-
What are the control methods for poplar canker?
Canker, also known as rot disease, is mainly distributed in northeast, northwest, north China and other regions of our country. It mainly damages the branches and trunks of trees, is extremely contagious, and once the disease becomes epidemic, it often causes large-scale death of forest trees, resulting in great losses. In recent years, due to large-scale planting of poplars, this disease has occurred from time to time in various places, and planting a single poplar variety...
-
What are the control methods for banana bunchy top disease?
What control methods are there for banana bunchy top disease? Please describe the methods. Banana bunchy top disease can be controlled by referring to the following methods: 1. Establish disease-free nurseries and cultivate disease-free seedlings. The nursery should be set up in a place with no banana plantations within a 2000-3000 m radius, to prevent aphids from entering and transmitting the disease; insect-proof nets can be added over the seedling shed. ...
-
What to Do When Bananas Shoot Buds Too Early? Master These Handling Methods
What should be done if bananas shoot buds too early? Please give an introduction to the management methods. Under normal conditions, bananas need 6-7 months of vegetative growth from planting to bud shooting so that nutrient accumulation is sufficient. Shooting buds too early results in too short a vegetative growth period, short and small pseudostems, and a reduced number of hands and fruits, causing yield reduction. This year, bananas shot buds early and the number of hands decreased...
-
How to fertilize sweet peppers to increase yield? These fertilization methods you need to master
How should sweet peppers be fertilized to increase yield? Please give an introduction. Sweet peppers have a long growth period, an underdeveloped root system, few roots, and shallow soil penetration; they are neither drought-tolerant nor waterlogging-tolerant. Their fertilizer demand is greater than that of tomatoes and eggplants, and they have a strong tolerance for fertilizer. The fertilizer demand characteristics of sweet peppers are: the highest potassium uptake, followed by nitrogen, and the lowest phosphorus. Among vegetables, sweet peppers...
-
What are the cultivation methods for sweet peppers? A detailed explanation of the key growing techniques
What cultivation methods are there for sweet peppers? Please explain that sweet pepper cultivation is divided into the early spring crop and the winter crop, with the methods as follows: Early spring crop: 1. Raising strong seedlings: Large arch shed: raise seedlings in a hotbed in late December, transplant in early March; solar greenhouse: sow from late November to early December, transplant in mid-to-late February. Most vegetable growers now...
-
What are the methods for topdressing sweet peppers in summer?
How do you topdress sweet peppers in summer? Please introduce the methods. Compared with other vegetables, sweet peppers have an underdeveloped root system and weak regeneration ability after the roots are damaged. Especially now that the air temperature is high and the soil temperature is also high, which is already unfavorable for the normal growth of sweet peppers, topdressing management should be even more careful. Only reasonable topdressing can effectively promote...
-
What is the best method for sweet peppers to set fruit continuously?
What method can make sweet peppers set fruit continuously? Please advise. To make sweet peppers set fruit continuously, do not rely on flower spotting to promote fruit set; you can promote sweet pepper fruit set through temperature regulation. Measures such as ventilation and shading can be taken to control the greenhouse temperature, and if necessary, spray chlormequat or daminozide to control excessive vegetative growth and promote flowering and fruit set. Nitrogen fertilizer application...
-
How to fertilize cauliflower planting? Master the correct fertilization method
How should cauliflower be fertilized when planting? Here is an introduction. You can refer to the following methods for fertilizing cauliflower: 1. Base fertilizer. Use farmyard manure, and the amount must be sufficient, 2000-3000 kg per mu, and at the same time, add 50 kg of compound fertilizer, applying it before the soil is plowed. 2. Topdressing. After cauliflower is planted, apply...
-
How to fertilize and water Malabar spinach? Detailed key points of the method
1. The common disease of Malabar spinach is brown spot. In the early stage of occurrence, spray 72% Kelu wettable powder 500 to 600 times dilution, or 68.75% Yibao dispersible granules 800 to 1000 times dilution for control. 2. If Spodoptera litura damage occurs, and many small holes are found at the tips of young leaves, pyrethroid insecticides can be sprayed at the 1st to 2nd instar stage...
条件筛选