Agricultural and Biological Research

Progression of bacterial blight disease (Xanthomonas axonopodis pv. cyamopsidis) of clusterbean relation to weather parameters

Vikash Kumar*

Clusterbean is the bushy annual herb has a deep-rooted system, is resilient and drought resistant pulse crop grown on sandy soil of arid and semi-arid region. The decline in clusterbean crop productivity is often attributed to several bacterial, fungal and viral diseases, including Bacterial blight (Xanthomonas axonopodis pv. cyamopsidis), vascular wilt (Fusarium moniliformae and Fusarium sp.), Charcoal rot (Macrophomina phaseolina), Powdery mildew (Leveillula taurica), Anthracnose (Colletotrichum capsici), and Alternaria blight (Alternaria cyamopsidis). Similarly, the limited and inconsistent national yield of grain and fodder can largely be ascribed to diseases caused by various plant pathogens. Among them, bacterial blight disease caused by Xanthomonas axonopodis pv cyamopsidis is a major disease in Rajasthan and India. The correlation between individual weather variable and disease intensity indicated that progression of bacterial blight disease intensity was strongly significantly negative correlated with maximum temperature (X₁) and minimum temperature (X₂). Relative humidity morning (X₃) and relative humidity evening (X₄) was strongly significantly positive correlated with disease intensity. Rainfall (X₅), rainy days (X₆) and sunshine (X₇) were none significantly positive correlated with disease intensity. The coefficient of multiple determinations (R²) was 94.95 per cent in Kharif 2023. Which means that 94.95 per cent disease intensity was depend on the weather parameters.