Plantwise Factsheets for Farmers
Bacteriosis in bell pepper
Xanthomonas campestris pv.
Recognize the problem
Bacteriosis affects the leaves and sometimes the
fruits. The leaves show some dark spots starting from the underside. When the attack
is severe, the leaves become dry and fall. Spot like scabs also appear on the fruits.
Bacteriosis, which is also an important disease in
tomato, is caused by a bacterium that appears when the climate is humid and the
temperature is regular. The disease develops best when the temperature is mild,
from 10 to 25°C. The bacterium can live on the soil and in stubbles from
several crops but the most common sources of the disease are infested seed and
diseased transplants. It’s therefore extremely important to use clean seeds.
Sow tolerant cultivars such as "Maravilla"
and/or "Monark" hybrids
- Eliminate stubble from damaged crops
- Practise crop rotation especially with corn, wheat or
other grains since the bacterium does not live on these crops
- Sow at more than 70 cm between furrows and more space
between plants to prevent diseased plants from contaminating healthy plants
- Transplant in periods of lower rainfall
- When the disease is already present in the crop, we
can apply chemical products such as: fungi-bactericide, rotating with copper
products or mixing the latter
When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.
The recommendations in this factsheet are relevant to:
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