According to the China Pesticide Network , cucumber powdery mildew, also known as "white hair" disease, is prone to yin. The disease occurs mostly in the middle and late stages of the plant, mainly affecting the leaves. In severe cases, it can extend to the petioles, stems and tendrils, but the fruits are usually less affected. At the beginning of the disease, small white spots appeared on the front and back of the leaves, which were enlarged and contiguous, and covered with a layer of white mildew. The edge of the white mold is not neat, and then becomes grayish white. The leaves are yellow, crisp and dry. Generally, starting from the bottom leaf, it gradually develops upward. In the later stages of the disease, in a bad environment, piles of yellowish brown to black small particles are produced in the white powder layer or on the surface of the aging leaves. Once the greenhouse is vaccinated, it develops rapidly. When it is serious, it can cause the leaves to dry up and even pull up early, which has a great impact on cucumber yield. In addition to harming cucumbers, it can also harm zucchini, melon, pumpkin, watermelon, melon, loofah and so on.
The pathogens are overwintered on the diseased body or the greenhouse with melons and closed capsules; the bacteria prefer high temperature and high humidity, but are resistant to drying, at a temperature of 20 to 25 ° C and a relative humidity of 70% to 85%. Most beneficial to the disease. In particular, the spring greenhouse cucumber is in a period of vigorous growth, which is also the peak period of fertilizer demand. Therefore, the agricultural conditions of the large fertilizer cause the environmental conditions in the shed to be suitable for the occurrence of powdery mildew, so even if various pesticides are used The control effect is not obvious.
Prevention and treatment methods: prevention and control of cucumber powdery mildew, prevention is the most important, farmers must be based on the situation, disease, disease, develop the habit of spraying protective fungicides, in order to ensure a good harvest.
(1) The use of fungicides, bacteriostatic agents, smoke treatment. (2) At the beginning of the disease, 2% agricultural anti-120 or Wuyimycin water 200 times solution, 10% Shigao 1500 times solution, 40% DuPont Fuxing 5000 times solution; 47% Jiaruinong 600-80O times solution can be sprayed. The medicine is used interchangeably, once every 7 to 10 days, and even sprayed 3 to 4 times.
Super-low Ash Coal Activated Carbon
coal-based activated carbon for water purification is widely used in the deep purification of drinking water, industrial water and wastewater. Industrial water purification and gas phase adsorption, such as power plant, petrochemical, oil refinery, food and beverage, sugar wine, medicine, electronics, fish, marine and other industries water purification treatment, can effectively absorb the water in the free, sulfur and other organic pollution special The price of the coal-activated carbon filter material, especially the precursor of the Mutant (THM), is to purify the impurity and remove the odor. can also be used for industrial exhaust purification, gas desulfurization, petroleum catalytic reforming, gas separation, pressure swing adsorption, air drying, food preservation, gas masks, media carrier recovery solvent Coal activated carbon, industrial solvent filtration, decolorization, purification and so on.
Use: Used in the purification of drinking water, deodorizing, brewing industry, decoloring of pharmaceutical and chemical products.
Spec.:
|
Model NO.
|
Moisture(%)
|
Strength(%)
|
Ash(%)
|
Idine value(mg/g)
|
Carbon tetrachloride(%)
|
Packing density(g/L)
|
pH-value
|
Grain diameter(mm)
|
| DX-3060 |
≤3
|
≥95
|
≤5
|
≥1010
|
≥60
|
520±20
|
8-10
|
Φ3.0
|
| DX-3070 |
≤3
|
≥95
|
≤6
|
≥1030
|
≥70
|
500±20
|
8-10
|
Φ3.0
|
| DX-3080 |
≤3
|
≥93
|
≤8
|
≥1050
|
≥80
|
450±20
|
8-10
|
Φ3.0
|
| DX-4060 |
≤3
|
≥95
|
≤5
|
≥1010
|
≥60
|
530±20
|
8-10
|
Φ4.0
|
| DX-4070 |
≤3
|
≥95
|
≤6
|
≥1030
|
≥70
|
520±20
|
8-10
|
Φ4.0
|
| DX-4080 |
≤3
|
≥95
|
≤8
|
≥1050
|
≥80
|
460±20
|
8-10
|
Φ4.0
|
| DX-4090 |
≤3
|
≥93
|
≤9
|
≥1080
|
≥90
|
430±20
|
8-10
|
Φ4.0
|
| DX-40100 |
≤3
|
≥90
|
≤10
|
≥1100
|
≥100
|
370±20
|
8-10
|
Φ4.0
|
| 8×30 |
≤5
|
≥93
|
≤5
|
≥1000
|
≥60
|
460±20
|
8-10
|
-
|
| 12×40 |
≤5
|
≥93
|
≤5
|
≥1000
|
≥60
|
450±20
|
8-10
|
-
|
Super-Low Ash Coal Activated Carbon
Super-Low Ash Coal Activated Carbon,Coal Agglomerated Activated Carbon,Coal-Based Granular Activated Carbon,Granular Activated Carbon
SHIZUISHAN ZhongShi activated carbon co,.ltd , http://www.zscarbonchina.com