Typical symptoms and major causes

Symptoms Major factors causing these symptoms
Differences in maturity Nutrition, water stress, varietal mix
Leaf edging Disease, nutrition, water stress
Leaf rolling Water stress
Lesions or color change Disease or nutrient deficiency
Physical damage Animals, insects, pests or cultivation damage
Poor plant stand Poor seed, poor land, preparation, seed planted too deep, pests, soil insects, moisture stress or flooding
Plant wilting Water stress, salinity, possibly root damage by insects
Reduced plant size Poor nutrition, water stress, salinity, varietal mix, low temperatures
Weeds: management Poor land preparation or late seeding after land preparation and rain