A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
November 2006. Samoa asked about white fly control methods.
Methods depend very much on the species present. If the silverleaf whitefly (Bemisia tabaci Biotype B or renamed as B argentifolii) is present, pyrethroids and organophosphate insecticides would not be an appropriate choice for control. For that species, a management package has been developed by the Queensland Department of Primary Industries & Fisheries for Australian vegetable growers.
Pohnpei, Federated States of Micronesia, provided the following non-chemical (synthetic) control practice:
1/2 a tablespoon of liquid detergent 1/2 a cup of cooking oil
Add to 1 gallon of water and mix thoroughly before spraying the underside of leaves. It is advisable to apply the spray early morning or in the evening. Do not spray when temperatures exceed 80??F: the plants may burn! Other non-toxic ingredients can be added, such as garlic, chillies and tobacco.