Author/Editor		Demšar, Tina; Dreo, Tanja; Ravnikar, Maja
Title		Bakterijska uvelost pelargonij Xanthomonas campestris pv. pelargonii (Brown 1923) Dye 1978
Translated title		Bacterial blight of geranium Xanthomonas campestris pv. pelargonii (Brown 1923) Dye 1978
Type		članek
Source		In: Dobrovoljc D, Urek G, editors. Zbornik predavanj in referatov 5. slovensko posvetovanje o varstvu rastlin; 2001 mar 6-8; Čatež ob Savi. Ljubljana: Društvo za varstvo rastlin Slovenije,
Publication year		2001
Volume		str. 464-7
Language		slo
Abstract		Bacterial blight, caused by Xanthomonas campestris pv. pelargonii (Brown 1923) Dye 1978, is the most destructive disease of Pelargonium and Geranium cultivars. Symptoms vary depending on the cultivar and species affected environmental conditions and the strain of the bacterium. Infected plants first develop small, sunken, water-soaked spots on the lower leaf surface. After several days spots become apparent on the upper surface of the leaves. The spots are then followed by wedge-shaped areas of chlorosis and necrosis. The bacterium moves into the vascular system and eventually causes wilt of the entire plant. The bacterium can survive for at least a year in undecomposed plant tissues, on foliage of nonhost plants and epiphytically on pelargonium and geranium leaves without causing symptoms. The most common means of spreading the bacterium is by cutting tools during propagation, by splashing water, dripping of water from hanging baskets above a susceptible crop, plant to plant contact and by some insects which can transmit the bacterium from diseased to healthy plant. Control measures must be based upon establishing pathogen-free certified plants and following strict sanitary procedures. The laboratory conformation of isolated bacteria is based on different media, immunofluorescence and biochemical tests and hypersensitivity reaction on tobacco leaves.
Descriptors		PLANT DISEASES XANTHOMONAS CAMPESTRIS