In recent days, some greenhouse growers have reported that the greenhouse cucumber vines overflowed with a transparent jelly. Soon afterwards, the vines rotted and died. The use of several bactericides to spray and wipe all had little effect, and they wanted to seek help. According to this situation, the author believes that this is most likely due to the hazards of cucumber bacterial blight. 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 beginning of onset, the leaves showed round or irregular lesions, 10-35mm in diameter. Some lesions showed "V" shape damage from the leaf margin to the leaves, light brown or yellow-brown, and later lesions were easily broken. , cracks, many small black spots on the students, mostly on the base of the stem and joint disease, lesions oval to spindle-shaped, yellow-brown depression, sometimes overflowing amber resin jelly, late disease stem longitudinal crack, severe stem Black rots and the normal vascular bundle at the root of the diseased plant 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%.
Removal method
(1) 25% Azoxystrobin 1500 sprays;
(2) 40% prochloraz 1000 times +2.5% fludioxonil 1500 times spray;
(3) "The world does not dry" brand 85% bacteriocortic? F mold 750 times that 20g + water 15 kg spray;
(4) "Rebirth" brand root disease 1+1 (45g in total) + 15 kg of water spray, this product is a heterocyclic compound, is a systemic effect of bactericidal drugs, there is a plant growth regulator, can be directly The roots and stems of plants are absorbed and the mechanism has unique effects.
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 50-100 times of the above-mentioned agent, and the effect is better.
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