This disease, also known as black rot and vine disease, is a common disease in cucumber production. The general diseased plant rate is 20% to 30%, and severely up to 70% to 80%, which mainly damages the leaves and stem vines. At the onset of disease, the leaves initially appeared round or irregularly shaped lesions, 10-35 mm in diameter, and some of the lesions showed "V"-shaped hazards from the leaf margins to leaves, light brown or yellow-brown, late lesions easy Broken, cracked, many small black spots on the stem, mostly on the base of the stem and section of the disease, lesions oval to spindle, yellow-brown depression, sometimes overflowing amber resin jelly, late disease stem longitudinal crack, severe The stem segments become black and rot, and the normal vascular bundle at the root of the diseased plants does not change color.
The disease is mainly caused by wind and rain, watering, agricultural operations and insects. The seeds can also be poisonous. The average temperature is 18-25°C, and the relative humidity is more than 85%.
In addition to governance methods:
125% azoxystrobin 1500 sprays.
240% prochloraz 1000 times +2.5% fludioxonil 1500 times spray.
3 "The world does not have dry" brand 85% Bactericide? F mold 750 times that 20 grams + water 15 kg spray.
4 "Rebirth" brand root disease dedicated 1+1 (45 grams total) + 15 kilograms of water spray, the product is a heterocyclic compound, is a systemic effect of bactericidal drugs, there is a plant growth regulator, can be directly It is absorbed by the rhizomes of plants and has unique effects on mechanism.
For the individual plants that have already been diseased, after spraying the whole plant with the above-mentioned agent evenly, the roots of the diseased plants are sprayed successively for a few times, which is equivalent to inundation and rooting.
It can also be applied with 5-100 times of the above-mentioned agent, and the effect is better.
Shenzhen Guangyang Zhongkang Technology Co., Ltd. , http://www.nirlighttherapy.com