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two or three hours under humid conditions, but infection takes a minimum of two or three days under optimal conditions (humidity close to saturation…
predominantly in tropical and subtropical areas, where conditions of high humidity and high temperature followed by periods of drought predominate. It…
dry leaves or leaves in the soil, but not independantly in the soil. Under humid conditions, bacteria ooze from the lesions on the leaves and form a…
grow through the petiole to the main stem through the xylem vessels. High humidity is required for disease development. Erwinia carotovora subsp.…
grow. The centre of the lesions may fall out as they become drier. Under humid conditions, the spots may merge with lesions on the petioles and stems…
28-30 °C (optimum temperatures lie between 15 and 28 °C) and at a relative humidity (RH) of over 90% or when the leaves are wet. Small differences in…
25 and 28 °C. Germination only occurs at relative humidity (RH) above 80%. Warm (25-30 °C) and humid (RH above 85%) conditions increase chances of…
Xanthomonas axonopodis pv. Punicae Pomegranate bacterial blight Relative humidity above 50% and temperature between 25 - 30 0 C, over-use of nitrogen…
source of infection. Secondary spread is through air borne conidia. High humidity favours the spread of the disease and severity. The fungus has the…
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