บทคัดย่องานวิจัย

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Apricot powdery mildew in Morocco: biological cycle of the fungus and control prospects.

Benjama, A.;

Fruits (Paris) Year: 1997 Vol: 52 Issue: 2 Pages: 117-125 Ref: 10 ref.

1997

บทคัดย่อ

Apricot powdery mildew in Morocco: biological cycle of the fungus and control prospects.

In Morocco, powdery mildew is the most serious apricot disease in orchards of the Marrakech region. Apricots affected by this disease lose their market value. Disease symptoms were monitored in terms of the fungus developmental stages. Blades coated with a sticky substance were hung in apricot trees to trap wind-borne perithecia and conidia to study the biological cycle of the fungus. The results obtained were used in an experiment to compare the efficacy of triforine, dinocap and bupirimate. The fungus had a conidial phase (April-late July) and a perithecial phase, which served to protect it during August-April. The first disease symptoms were noted on fruit in April, caused by ascospores released by mature perithecia. The dichotomous shape of their fulcra was characteristic of Podosphaera tridactyla. Satisfactory results were obtained when fungicides were carried out through 2 successive crop seasons. Dinocap and triforine (at manufacturers' recommended doses) were significantly better active

ingredients than bupirimate. Based on the experimental results, a treatment schedule using dinocap is recommended. It is suggested that, in addition to providing protection during the fruiting period, postharvest treatments should also be conducted in orchards during the perithecial phase which is mainly responsible for the fungal attacks that occur in April. Nurseries should also be treated.