Pest identification
What's eating my bitter melon (bitter gourd)?
Melon fruit fly (Bactrocera cucurbitae)
Signs: Female stings developing fruits to lay eggs; maggots rot the flesh from inside; fruits drop early or become inedible; losses of 30–100% are documented.
Control: Protein-bait traps (cue-lure + insecticide); harvest fruits before fully ripe; remove and destroy all fallen fruits daily; fine mesh row covers over young fruits.
Aphids (Aphis gossypii — melon/cotton aphid)
Signs: Colonies under leaves and on vine tips; curl and yellow new growth; transmit cucumber mosaic virus which stunts the whole plant.
Control: Strong water-jet knockdown; insecticidal soap; reflective silver mulch repels alate aphids; encourage natural enemies with nearby flowering plants.
Whitefly (Bemisia tabaci)
Signs: Adults and nymphs suck sap from leaf undersides; honeydew promotes sooty mould; transmits viral diseases that cause leaf curl and yield loss.
Control: Yellow sticky traps to monitor and reduce adults; insecticidal soap or neem oil on leaf undersides; reflective mulch at planting.
Spider mites (Tetranychus urticae)
Signs: Fine pale stippling on upper leaf surface; webbing on undersides; severe infestations cause bronzing and premature leaf drop, stressing fruit set.
Control: Maintain soil moisture; strong water spray on undersides of leaves; neem oil or insecticidal soap; predatory mites (Phytoseiulus persimilis) as a biological control.
Keep bitter melon (bitter gourd) pest-free
Healthy plants resist pests best. Get the basics right:
Bitter Melon (Bitter Gourd) pests — FAQ
What is eating my bitter melon (bitter gourd)?
Bitter Melon is a cucurbit vine and melon fruit fly is its most destructive pest, causing up to 100% crop loss by maggots destroying fruit from within. Aphids, spider mites, and whitefly also attack. Strict sanitation and protein-bait traps are essential; row covers protect at the seedling stage.
How do I get rid of melon fruit fly (bactrocera cucurbitae) on bitter melon (bitter gourd)?
Female stings developing fruits to lay eggs; maggots rot the flesh from inside; fruits drop early or become inedible; losses of 30–100% are documented. Protein-bait traps (cue-lure + insecticide); harvest fruits before fully ripe; remove and destroy all fallen fruits daily; fine mesh row covers over young fruits.
How do I get rid of aphids (aphis gossypii — melon/cotton aphid) on bitter melon (bitter gourd)?
Colonies under leaves and on vine tips; curl and yellow new growth; transmit cucumber mosaic virus which stunts the whole plant. Strong water-jet knockdown; insecticidal soap; reflective silver mulch repels alate aphids; encourage natural enemies with nearby flowering plants.
How do I get rid of whitefly (bemisia tabaci) on bitter melon (bitter gourd)?
Adults and nymphs suck sap from leaf undersides; honeydew promotes sooty mould; transmits viral diseases that cause leaf curl and yield loss. Yellow sticky traps to monitor and reduce adults; insecticidal soap or neem oil on leaf undersides; reflective mulch at planting.
How do I get rid of spider mites (tetranychus urticae) on bitter melon (bitter gourd)?
Fine pale stippling on upper leaf surface; webbing on undersides; severe infestations cause bronzing and premature leaf drop, stressing fruit set. Maintain soil moisture; strong water spray on undersides of leaves; neem oil or insecticidal soap; predatory mites (Phytoseiulus persimilis) as a biological control.