Histological Studies of Colletotrichum orbiculare on the Susceptible and Resistant Cucumber Cultivars

The infection process of Colletotrichum orbiculare on the leaves of susceptible and resistant cucumber cultivars were studied histologically. On both cultivars, conidia began to germinate 8 h after inoculation (hai) and formed appressoria. Then melanised appressoria formed penetration pegs at 10 hai. On the susceptible cultivar, infection vesicles formed within 24 hai and developed thick, […]

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Infection Process of Sphaerotheca fuliginea on Host Cucumber and on host Wheat Leaves

The infection process of Sphaerotheca fuliginea into epidermal cells of host cucumber and nonhost wheat were studied histochemically. The percentages of germinated conidia had no significant difference on cucumber and wheat leaves at the pre-penetration stage. When S. fuliginea overcame the constitutive barriers of wheat leaf, papillae and hypersensitive reaction were induced to prevent the […]

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Antagonistic Actinomycete XN-1 from Phyllosphere Microorganisms of Cucumber to Control Corynespora cassiicola

Strain XN-1 isolated from the cucumber phyllosphere was tested for potential application as an antagonistic actinomycete against Corynespora cassiicola (Berk.& Curt.)Wei. The fungistatic activity of this strain was determined by inoculation of C. cassiicola on PDA plates, spore germination inhibition in culture filtrate and control tests on cucumber leaves. The spore germination and hyphal growth […]

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The Relationship between Papilla formation and Resistance of Cucumber to Sphaerotheca fuliginea (Schlect.) Poll.

Cucurbit Genetics Cooperative Report 19: 30-31 (article 11) 1996 Qing Ma, Hongwen Cui Department of Plant Protection, Northwestern Agricultural University, Yangling, Shaanzi,71200, P.R. China, Department of Horticulture, Northwestern Agricultural University, Yangling, Shaanxi, 712100, P.R. China Introduction. Papillae are the wall oppositions occurring between the cell wall and plasmalemma when fungal infection pegs penetrate a plant […]

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Hisopathology of Cucumber Resistance to Downy Mildew

Cucurbit Genetics Cooperative Report 18:26-28 (article 12) 1995 Qing Ma, Hongwen Cui Department of Plant Protection, Northwestern Agricultural University, Yangling, Shaanxi 712100, P. R. China; Department of Horticulture, Northwestern Agricultural University, Yangling, Shaanxi 712100, P.R. China Downy mildew, Pseudoperonospora cubensis (Berk. et Curt.) Rastow, is the most destructive cucumber disease in China. Breeding for disease […]

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