Fusarium disease

Symptoms: Phalaenopsis infected with this disease, causing yellow spots in the leaves, turning black and perforated, the surrounding tissues gradually turning yellow, and eventually causing the leaves to wither or fall off. Catalan (Cattleya orchid) pedicels and flowers are more susceptible to infection, the injured parts are brown concave wet spots, after expansion, the pedicels turn brown and shrink, causing the pedicels to turn brown and shrink, causing flower drop or reducing commodity value.

Control methods:

1. Improved ventilation, plenty of light.

2. Plant material corruption to replace new material, old plant material easy to breed bacteria.

3. Treatment agent: 75% chlorothalonil 500 times solution, 70% mancozeb 500 times solution or 1:1:200 bordeaux mixture sprayed once a week.

4. Health care at ordinary times with 75% chlorothalonil 500 times solution or 70% mancozeb 500 times solution or 1:1:200 Bordeaux mixture, spraying regularly once a month can prevent. (Xue Congxian)