Bean fly attack signs include stem maggots, swollen stem base, wilting, yellowing and death of crop, 2-4 weeks after planting.
If spotted, cover the swollen stem base with soil during weeding or spray with cypermethrin & dimethoate chemicals.
During heavy rains, observe for bean anthracnose signs such as: round sunken brown wounds on the stem, black injuries on veins underside the leaves.
To control, plant resistant varieties, disease free seed, avoid waterlogging fields & rotate beans with other crops.
Root rot signs include yellowing & death of bean plant, one week after germination.
To control, improve your soil fertility using manure or inorganic fertilizers. Plant treated seed and resistant varieties next season.