
Symptoms, treatments and recommendations for treating bacterial spot
Bacterial Stain
Xanthomonas Hortorum Pv. Pelargonii
Pathogen:
Type:
Bacterium
Risk:
INTERMEDIATE

Geranio
Bacteriosis

WHO CAUSES IT?
Bacterial spot, caused by the bacteria Xanthomonas hortorum, is a common disease that affects geraniums and other ornamental plants. This bacteria is pathogenic for a wide range of hosts and can cause significant damage under favorable conditions.
SYMPTOMS
Bacterial spot is characterized by the formation of small necrotic lesions on the leaves, stems and flowers of the plant. These lesions usually have a yellow or brown center surrounded by a yellowish halo, giving the disease its characteristic appearance. As the disease progresses, the lesions can fuse and cause premature defoliation of the plant, weakening it and affecting its growth and flowering.



TEMPERATURE AND HUMIDITY
25°C - 30°C
70% - 90%
TRANSMISSION ROUTES
Direct contact, transport by irrigation water.
Do you want to remove this disease? Choose how you want to treat it.
TREATMENTS
Chemical treatments
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
Authorized treatments in organic farming
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
Biological control
• BACILLUS SUBTILIS (STRAIN QST 713) 1.34% [SC] P/V
Recommendations
To prevent the appearance of bacterial spot on geranium, it is important to maintain good hygiene in the garden or in the environment where the plant is grown. It is recommended to avoid overhead irrigation, which can promote the spread of the bacteria, and use irrigation techniques that avoid wetting the leaves and stems of the plant. In addition, it is important to regularly remove disease-affected plant parts and avoid over-fertilizing, which can weaken the plant's resistance to disease.









