Green peach aphid
Green or pinkish aphids crowd the underside of the young and middle leaves, which turn sticky and curl.
Crops it attacks
Where the damage shows
When to act
Weekly, check the top leaves of 20 plants at 5 spots. Act when 1 in 10 plants has 50 or more aphids on any upper leaf.
What to spray
- AcephateIRAC 1BShopeeLazada
- MethomylIRAC 1AShopeeLazada
- MalathionIRAC 1BShopeeLazada
- Fenobucarb (BPMC) plus chlorpyrifosIRAC 1A plus 1BShopeeLazada
- CarbarylIRAC 1AShopeeLazada
- DiazinonIRAC 1BShopeeLazada
- PhenthoateIRAC 1BShopeeLazada
- DimethoateIRAC 1BShopeeLazada
- AbamectinIRAC 6ShopeeLazada
- FenthionIRAC 1BShopeeLazada
- FormetanateIRAC 1AShopeeLazada
- Isoprocarb (MIPC)IRAC 1AShopeeLazada
Active ingredients only, never brands. The IRAC group tells how it works: switch to a different group next time, so the pest does not learn to survive it. Spray only when the damage is worth the cost, and only with products registered with the Fertilizer and Pesticide Authority for your crop. Follow the label. The Shopee and Lazada links only show who sells something with that active ingredient, not a recommendation of any seller or product.
Resistance: Green peach aphid, in Asia too, resists pyrethroids, many organophosphates and carbamates, and in places neonicotinoids. On tobacco the labels carry mostly old chemistry, so switch acephate with soap or oil sprays and keep the predators alive.
On labels for it, but not advised
- Cypermethrin, alpha cypermethrin, lambda cyhalothrin, permethrin and fenvalerate: Green peach aphid resists pyrethroids almost everywhere, and the spray kills lady beetles, so aphids return worse.
How to prevent it
- Raise seedlings in clean, netted seedbeds and plant only aphid free seedlings.
- Top and remove suckers on time. Aphids crowd on the tender tops and suckers.
- Go easy on nitrogen. Soft, lush leaves feed big colonies.
- Destroy old tobacco stalks and weeds right after harvest.
- Yellow sticky traps show when winged aphids arrive in the field.
Natural enemies and biological help
- Lady beetles, syrphid fly larvae, lacewings and Aphidius wasps eat or parasitize the aphids. Leave them unsprayed.
- Soap, horticultural oil and neem kill aphids on contact with little harm to the helpers. Fungi help in humid weather.
Where this comes from
Not sure it is this one?
Many pests look alike. Send a photo to Anee, the smart farm technician in anee.io. She reads it with your crop, its age and the weather, and tells you what it most likely is and what to do first. In Tagalog or English.