What disease is the middle part of the stem of the flower blackened and wilted? What kind of medicine is better to treat black rot
People who grow cucurbitaceae plants know that this plant is prone to a disease of blackening in the middle of the flower stem and fruit rot, which is called fudge Fusarium wilt, also known as black rot.
Geography: worldwide, but most common in temperate and tropical regions with high rainfall, as well as in greenhouses. In the United States, sticky blight is the most common in the southeast.
Affected crops: all gourds, but cantaloupes, watermelons and cucumbers are more vulnerable to sticky blight than pumpkins. Pumpkins, cucumbers and cantaloupes are the cucurbitaceae fruits most vulnerable to black rot.
It is important to know that growers should also be aware that gelatinous stem blight fungi produce two types of spores: wet conidia that spread over short distances in wet weather and dry ascospores transmitted by the wind.
Recommended treatment:
Conventional fungicides are the most effective treatment options. Growers should be aware that the most common sticky stem blight fungus, S. citrulli, is resistant to fungicides FRAC code 1, 7 and 11. In Georgia, S. The sensitivity of caricae to FRAC Code 3 fungicides decreased. According to the fungicide resistance reported by the states, growers should be careful not to use the wrong fungicide.
Organic growers can use Oso (Certis USA). Its active ingredient polyoctyl zinc sulfate can be used as an antibiotic. Sticky Fusarium wilt needs water from the leaves to develop. In dry seasons, fungicide spray can be carried out fortnightly instead of weekly, such as in normal or wet seasons. However, you should continue to spray powdery mildew, which will be more active during the dry period.
Growers managing sticky Fusarium wilt may not start using fungicide sprays as soon as possible. In order to work, fungicides must be applied before the leaves are infected, so fungicides should be applied first when male flowers appear. The application of fungicides in diseased leaves produced later this season may help to limit the size of leaf spots, but does not eliminate spots or prevent them from expanding.
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