Mini Orange Tree Pest Control: Caterpillars and General Insect Spray

What's Eating Your Citrus?

If leaves are being chewed, the culprits are likely caterpillars (butterfly/moth larvae), beetles, or grasshoppers. Citrus trees outdoors attract a variety of leaf-munchers. The good news: a simple contact spray handles most soft-bodied insects effectively.

Universal Contact Spray

• 1 part 70% isopropyl alcohol
• 1 part water
• 2 tsp mild dish soap per quart of mix

Combine in a spray bottle. Shake well.

Spraying Procedure

1. Spray thoroughly: tops and bottoms of all leaves, stems, trunk, and soil surface.
2. Repeat in 4 days, then twice a week until no insects are seen for 2 weeks.
3. Apply in early morning or evening to avoid leaf burn from sun on wet leaves.

Why Alcohol Works

Isopropyl alcohol dissolves the insect's protective cuticle, causing rapid dehydration and death on contact. It evaporates quickly, leaving no harmful residue on edible fruit (rinse fruit before eating if sprayed recently).

Additional Citrus Care

• Light: Full sun (6+ hours) for best fruiting.
• Water: Deep watering when top 2–3 inches of soil are dry.
• Fertilizer: Citrus-specific fertilizer 3×/year (spring, summer, fall).
• Monitor: Check weekly for pests, especially new growth.

This spray is your first line of defense for most citrus pests. For severe infestations or scale (hard bumps that don't flick off), a horticultural oil spray may be needed—but start with the alcohol mix; it's safer and often sufficient.