Identification points: The appendix bacterial leaf spot mainly damages the leaves. The lesions at the tip or leaf margins and leaves of the diseased leaves form water-stained oval or irregular lesions that extend parallel to the veins to form a spindle-shaped, slender lesion with yellow halos, and the leaves die when severe.
Occurrence characteristics: The pathogen is bacteria. The pathogens overwinter in sick bodies and bulbs, and are splashed into the leaves of plants by the rain in the following year. They are immersed in water holes, stomata, and wounds. Adequate rainfall, lush growth of plants, plant wounds in case of strong winds, and high air humidity are all suitable for the disease.
Control methods: (1) Remove the sick body, pay attention to ventilation and light transmission. (2) Nursery beds and potted soils are sprayed or rooted with 25% enesulfuron sodium WP 600 times, and organic fertilizers used also need to be sterilized. (3) Before the onset of disease, spray 200 units of agricultural streptomycin powder 1000 times and 30% of cystohexanone wettable powder 500-600 times.
Occurrence characteristics: The pathogen is bacteria. The pathogens overwinter in sick bodies and bulbs, and are splashed into the leaves of plants by the rain in the following year. They are immersed in water holes, stomata, and wounds. Adequate rainfall, lush growth of plants, plant wounds in case of strong winds, and high air humidity are all suitable for the disease.
Control methods: (1) Remove the sick body, pay attention to ventilation and light transmission. (2) Nursery beds and potted soils are sprayed or rooted with 25% enesulfuron sodium WP 600 times, and organic fertilizers used also need to be sterilized. (3) Before the onset of disease, spray 200 units of agricultural streptomycin powder 1000 times and 30% of cystohexanone wettable powder 500-600 times.
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