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Citrus Scab

Citrus scab is caused by the fungus Elsinoë fawcettii. The disease attacks the leaves, twigs and the fruits when they are young, producing slightly raised, irregular scabby or wartlike outgrowths. The scabs are grey or pinkish at first and become darker with age.

If leaves from the previous season are heavily infected by citrus scab, 3 applications of fungicide are needed to control the disease: the first at about 1/4 expansion of the spring flush, a second at petal fall, and a third about three weeks later. Timing of the fungicide applications is critical for citrus scab management, but if there is little carryover of disease from the previous season, the first spray can be omitted.

Tebuconazole 50% + Trifloxystrobin 25% WG

Metiram 55% + Pyraclostrobin 5% WG