INCIDENCE OF CITRUS CANKER ON ACID LIME IN RED AND LATERITIC AGRO-CLIMATIC ZONE OF WEST BENGAL, INDIA

Abstract

Citrus canker caused by Xanthomonas axonopodis pv. citri (ex Hasse) Vauterin et al. is one of the most important diseases of acid lime [Citrus aurantifolia (Christm.) Swingle] in West Bengal. The disease was recorded from nine different blocks of three different districts under Red and Lateritic Agro-climatic Zone of the state. Lowest disease incidence (<3.0 % PDI) was recorded during November in all the districts. Highest of that was observed during August (4.70 %) followed by May (4.46%). Disease intensity was also varied district wise. All the above ground parts viz., leave, stems and fruits were infested with cankerous growth of the disease and produced characteristics symptoms. There was a sharp relation among different weather variables and disease intensity.