Citrus Canker(Xanthomonas citri) is the most serious bacterial disease of sour lime during rainy season. The disease symptoms appear
on leaves, branches and fruit stalks. Canker lesions appear as yellowish spots, which gradually
enlarge and appear as raised, rough brownish pustules. These pustules are surrounded by a
characteristic yellow halo. Canker lesions on the fruits are confined to the rind only and do not
penetrate into the flesh of the fruit. The market value of the canker-affected fruits is very much reduced.
Control : Pruning and burning all the canker-infected twigs before monsoon and disinfecting the cuts
with Bordeaux paint can prevent the further spread of disease.
Three sprays of Streptocycline 100 ppm (10 g of Streptocycline + 5 g Copper Sulphate in 100 litres
water) or Blitox (0.3%) or neem cake suspension (1 kg in 20 litres water) during February, October and
December can control the disease.
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