Papaya (Carica papaya)
Aphids (Aphis gossypii)
Symptoms
- The pest attacks young stems and the undersides of leaves.
- Leaves curl.
- Plant stunts.
- Fungal growth is seen on the leaves due to the honey-like fluid secreted by the pest.
Management
- Check transplants for aphids before planting.
- Reflective mulches such as silver colored plastic can deter aphids from feeding on plants.
- Sturdy plants can be sprayed with a strong jet of water to knock aphids from leaves.
- Use yellow sticky traps for aphids and whitefly @ 4-5 trap/acre.
- Release 1st instar larvae of green lacewing bug (Chrysoperla zastrowi) @ 4,000 larvae/acre.
- Spraying with tobacco decoction (1 Kg tobacco boiled in 10 l of water for 30 minutes and making up to 30 l + 100 g soap).
- Organic control includes insecticidal soaps (1%) and horticultural mineral oils (1%).
- Spray with 4g thiamethoxam/10l of water
- The entire plant canopy should be drenched with the solution
- Natural enemies of aphid
- Parasitoids: Aphidius colemani, Aphelinus sp.,
- Predators: Fire ant, Robber flies, Big-eyed bug (Geocoris sp), Earwig, ground beetle, Cecidomyiid fly, Dragon fly, Praying mantis, Lacewing, Ladybird beetle, Spider etc.