Begonia, Tuberous
Symptom Cause  
White cottony masses on roots and stems above or just below surface; plant looks wilted
Mealybugs
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White powdery coating on leaves
Powdery Mildew
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Ragged holes in leaves, often in middle
Slugs and Snails
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Leaves mottled, yellow; tiny white insects feeding on underside of leaves
Whiteflies
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