Explore key symptoms and causes of common disorders affecting Bengal Gram crops. Improve your ability to identify and understand issues impacting the health and yield of gram plants.
A Bengal Gram farmer notices sudden yellowing, drooping, and eventual death of entire plants in scattered patches. Which disorder is most likely responsible?
Explanation: Fusarium wilt causes rapid yellowing and wilting, often killing plants in patches; it is soil-borne and enters via roots. Yellow mosaic virus causes leaf mottling and stunted growth, not rapid death. Root rot mainly causes root decay with less sudden above-ground symptoms. Leaf curl primarily affects leaf shape and size, not rapid wilting.
A field of Bengal Gram shows leaves with interveinal chlorosis (yellowing between veins) and stunted growth. Which nutrient deficiency is most probable?
Explanation: Zinc deficiency causes interveinal chlorosis and stunted growth in Bengal Gram. Copper deficiency can cause pale leaves but rarely interveinal yellowing. Calcium deficiency often shows as tip burn or poor root growth. Boron toxicity results in leaf margin necrosis, not chlorosis or stunting.
In Bengal Gram, plants exhibit brown, decayed roots and poor plant stand during humid conditions. Which disorder fits these observations?
Explanation: Root rot in Bengal Gram leads to brown, decayed roots and is aggravated by moisture. Rust causes orange pustules on leaves, not root decay. Powdery mildew presents as white powdery growth on leaves and stems. Pod borer damage is identified by eaten or damaged pods, unrelated to roots.
A Bengal Gram crop displays yellow mosaic patterns on leaves and general stunting. What is the most likely cause?
Explanation: Yellow mosaic virus causes yellow and green patches on leaves along with plant stunting. Downy mildew results in a fuzzy growth on leaves, not mosaics. Fusarium wilt produces wilting and yellowing, but not mosaic patterns. Ascochyta blight causes brown spots with a dark border, not mosaics.
During flowering, Bengal Gram plants show bud abortion and flower drop after a spell of dry, hot winds. Which abiotic stress is the most probable cause?
Explanation: Moisture stress from drought and high temperatures causes bud abortion and flower drop during flowering. Iron toxicity usually affects lowland crops by causing bronzed leaves. Bacterial blight manifests as water-soaked spots, not bud drop. Phosphorus surplus rarely causes recognizable plant disorder symptoms.