What are the control methods for autumn tomato fruit rot?
What methods can prevent autumn tomato fruit rot? Please explain. Fruit rot during the fruiting stage of autumn tomatoes is mainly caused by soft rot, brown rot, and anthracnose. Strengthening scientific management and preventing these three diseases are effective ways to control fruit rot. 1. Management on sunny days. In general, tomato fruit rot is caused by pathogen infection...
What methods can prevent autumn tomato fruit rot? Please explain.
Fruit rot during the fruiting stage of autumn tomatoes is mainly caused by soft rot, brown rot, and anthracnose. Strengthening scientific management and preventing these three diseases are effective ways to control fruit rot.
1. Management on sunny days
Tomato fruit rot is generally caused by pathogen infection, often resulting from pathogen infection due to unfavorable weather or improper timing when pruning and training tomato plants, which triggers disease. Therefore, plant management of tomatoes must be carried out in sunny weather. Avoid pruning and removing side shoots on rainy days or when dew has not yet dried, so as to promote rapid healing of wounds and prevent pathogen invasion.
2. Method of removing sources of disease
After tomato plants are infected by pathogens, the symptoms on branches and leaves are relatively obvious. When brown spots are found on branches and leaves, this is the early stage of pathogen infection. Diseased and damaged branches and leaves should be removed and destroyed in a timely manner, and fallen leaves and rotten leaves on the ground should be promptly cleared and gathered outside the garden to be burned or buried in pits. This prevents the spread of the disease source.
3. Method of chemical control
When there is continuous rainy weather and high air humidity, tomatoes are most susceptible to pathogen infection, so chemical control should be carried out. For soft rot, spray with a 1000-fold dilution of 70% Dexon, once every 8-10 days; for brown rot, spray with an 800-1000-fold dilution of 25% Ridomil, once every 7 days, for 2-3 consecutive sprays; for anthracnose, spray with an 800-fold dilution of 80% anthracnose thiram wettable powder or a 500-fold dilution of 50% carbendazim wettable powder, once every 8-10 days, for 2 consecutive sprays.
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