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- W3184470366 abstract "Abstract A description is provided for Pseudoperonospora cubensis . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Chiefly of cultivated species of Cucumis (cucumber, melon), Cucurbita (squash, marrow, pumpkin) and Citrullus (watermelon). Less frequent on approximately 40 wild and cultivated species of 18 other genera (e.g. Benincasa, Lagenaria, Luffa, Momordica, Trichosanthes ). DISEASE: Causes downy mildew of Cucurbitaceae . Infection normally confined to bright yellow spots on upper surface of leaves, with light spots covered by greyish-black down on their lower surface, spots become necrotic and turn brown from their centre outwards. On cucumbers the spots are angular, clearly limited by leaf veins, but on melons and most other hosts vein delimination is not so clear. Cotyledons sometimes affected, but very young true leaves are not. Strongest development on leaves 5-15 days after their formation. Affected leaves dry up, do not shed. Flower parts are rarely affected and fruit and seeds never affected. GEOGRAPHICAL DISTRIBUTION: Widely distributed especially on cucumbers and melons in warm and humid zones (CMI Map 285. ed. 3. 1969). TRANSMISSION: All year round transmission in warm and humid climates from older to younger crops, under semi-arid conditions from irrigated summer crops to winter crops grown under cover and then to spring crops. Summer invasions from countries wilh mild winters to those with cooler winters is likely. Overwintering by oospores held to be possible in China and Japan." @default.
- W3184470366 created "2021-08-02" @default.
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- W3184470366 date "1975-12-01" @default.
- W3184470366 modified "2023-10-07" @default.
- W3184470366 title "<i>Pseudoperonospora cubensis</i> . [Descriptions of Fungi and Bacteria]." @default.
- W3184470366 doi "https://doi.org/10.1079/dfb/20056400457" @default.
- W3184470366 hasPublicationYear "1975" @default.
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