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Plum Tree Stress After Aphid/Ant Infestation: Water and Organic Sprays

Three-year-old plum tree with brown leaf spots, yellowing, leaf curl after ant/aphid breach: ants indicate dry soil; yellow leaves = water stress. Tree unhappy, attracting pests.

Recovery

Water deeply: minimum 3 inches per week (measure with pan).
Spray neem oil or Organicide for residual pest suppression.
Remove mummified fruit and fallen leaves.
Mulch to conserve moisture.

Key Insight

Healthy, well-watered trees resist pests. Address water first; pests are secondary.

Plant Diseases: Blue Plum Fruit Rot: Brown Rot Disease; Plum Tree Brown Rot: Sanitation and Fungicide Timing; Plum Fruit Drop: Water, Pollination, or Fungus?; Plum Tree Decline: Bacterial Infection and a Systemic Cleanup Approach; Victoria Plum Maggots: Plum Moth, Preventive Spraying Required; Plum Pocket Disease: Remove Fruit, Fungicide Next Year; Preventing Plum Tree Fruiting with Growth Regulators; Plum Tree Dying Back: Likely Brown Rot Blossom Blight; Preventing Fruit on Ornamental Plum Trees; Plum Tree Leaf Spot and Fruit Drop in New Zealand

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