Pest identification
What's eating my bottle gourd?
Striped and spotted cucumber beetles (Acalymma vittatum / Diabrotica undecimpunctata)
Signs: Chewed leaves and flowers; transmission of bacterial wilt (Erwinia tracheiphila) which causes sudden plant collapse
Control: Row cover until flowering begins; apply kaolin clay; use yellow sticky traps; remove and destroy wilted plants promptly
Aphids
Signs: Colonies on growing tips and leaf undersides; honeydew, sooty mould, and virus transmission
Control: Strong water jet; insecticidal soap or neem oil; introduce ladybirds and lacewings
Squash vine borer (Melittia cucurbitae) — US East
Signs: Sudden wilting of runners; sawdust-like frass at stem base; larvae tunnel inside the main stem
Control: Wrap stem bases in foil; apply Bt to stem base before eggs hatch; succession plant to outpace borer season
Melon fruit fly (Zeugodacus cucurbitae) — tropical/subtropical
Signs: Maggots inside developing fruit; premature fruit drop and internal rot
Control: Protein bait traps; bag developing fruits; remove dropped fruits promptly; exclude with fine mesh in small gardens
Keep bottle gourd pest-free
Healthy plants resist pests best. Get the basics right:
Bottle Gourd pests — FAQ
What is eating my bottle gourd?
Bottle gourd (Lagenaria siceraria) is a vigorous cucurbit and shares most cucurbit pest problems. Aphids and cucumber beetles are the two most consistent threats — beetles spread bacterial wilt disease, which can kill plants quickly. Squash vine borers (US East) bore into stems. In South Asia and tropical gardens, fruit flies also cause significant damage.
How do I get rid of striped and spotted cucumber beetles (acalymma vittatum / diabrotica undecimpunctata) on bottle gourd?
Chewed leaves and flowers; transmission of bacterial wilt (Erwinia tracheiphila) which causes sudden plant collapse Row cover until flowering begins; apply kaolin clay; use yellow sticky traps; remove and destroy wilted plants promptly
How do I get rid of aphids on bottle gourd?
Colonies on growing tips and leaf undersides; honeydew, sooty mould, and virus transmission Strong water jet; insecticidal soap or neem oil; introduce ladybirds and lacewings
How do I get rid of squash vine borer (melittia cucurbitae) — us east on bottle gourd?
Sudden wilting of runners; sawdust-like frass at stem base; larvae tunnel inside the main stem Wrap stem bases in foil; apply Bt to stem base before eggs hatch; succession plant to outpace borer season
How do I get rid of melon fruit fly (zeugodacus cucurbitae) — tropical/subtropical on bottle gourd?
Maggots inside developing fruit; premature fruit drop and internal rot Protein bait traps; bag developing fruits; remove dropped fruits promptly; exclude with fine mesh in small gardens