Question

Late blight of potato — a historically devastating disease associated with the Irish famine — is favoured by which specific weather conditions, and its management primarily relies on which type of chemical control strategy?

A Hot, dry weather; systemic insecticide application
B Cool, moist/humid weather with high relative humidity; prophylactic fungicide sprays (contact and systemic)
C High temperature with low humidity; herbicide application
D Any weather condition; no chemical control is generally needed
E Frost conditions only; seed treatment alone is generally sufficient
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