Cabbage, broccoli, radish, Chinese cabbage and other cruciferous vegetables, clubroot disease, is a common major disease. The main damage to the roots, resulting in the main root or lateral roots appearing in size, shape like a finger, short rod or spherical tumor, severe root tumors up to dozens, string together. After the illness, it can result in a significant reduction in yield or even a loss.
The cruciferous vegetable clubroot disease is a fungal disease, and the root pediculatum prefers acidic soils. In general, crucifer crops are most often associated with continuous cropping plots, acidic soil plots, low-lying wetlands, and poorly drained plots. Fields with excessive nitrogen fertilizers are more severe.
Prevention and treatment of club root disease should take comprehensive control measures. It is advisable to implement rotation between paddy crops and non-cruciferous crops for 3 to 5 years, combined with deep plowing, which can effectively reduce the occurrence of diseases. In addition, lime can be added to reduce soil acidity to reduce the incidence.
Pharmaceutical control techniques are as follows:
The first is to do a good job of seed disinfection. Before sowing, soaking in warm water at 55°C for 15 minutes, then soaking for 10 minutes with 10% suspension of cyclosulfuronazole 2000~3000 times, sowing after sowing.
The second is seed bed disinfection. It can be sprayed with 50% sodium propionate soluble powder 500 times solution or 10% suspension solution of Cyazolamidazole 1000 to 1500 times, and the soil depth is about 15 centimeters.
The third is seedling sterilization. Seedlings before transplanting with a suitable concentration (15%) of lime water or 10% suspension of cyazosulfuron suspension 1500 ~ 2000 times liquid immersed root or rooting water pouring, to prevent bacteria from invading the root system.
Fourth, disinfection and sterilization of Datian before transplanting. The agents used were fluazinam and spectrophotometric. The fluazinam spray-mixed soil treatment is a highly effective drug for controlling clubroot disease. However, when the concentration is large, it has an inhibitory effect on the root growth of the seedlings, and it is not suitable to perform centralized treatment such as irrigating roots. 60% of the spectrophotometers are generally sprayed with 750 times, and used as field soil disinfection treatment, the effect can reach 70%~80%.
The fifth is the control of spraying after onset. After C. cruciferae vegetables exhibit clubroot symptoms, they can be used to irrigate the roots with a 10% suspension of Cyazosulfuron 1500-2000 times, or with a 75% chlorothalonil wettable powder 800 times, or with 20% quinoline. Trimethoprim wettable powder 1000 times, on the base of the diseased plants sprayed and controlled.
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