Aphelinus abdominalis
Aphelinus abdominalis will help prevent outbreaks of aphids when used as recommended. It may entirely prevent colonies developing if used at the beginning of the risk period. It may also be used at higher rates to bring moderate infestations under control, but should be used in conjunction with other biocontrols in this situation.
2-5 per 100 square foot
Target Pests: Aphids (Macrosiphum euphorbiae and Aulacorthum solani)
Description: Aphelinus abdominalis is a parasitic wasp that target second and third instar aphids. Larger aphids are less frequently attacked, while the small aphids are also a food source for adults.
Use in Biological Control: Aphelinus will help prevent outbreaks of aphids when used as recommended. It may entirely prevent colonies developing if used at the beginning of the risk period. It may also be used at higher rates to bring moderate infestations under control, but should be used in conjunction with other biocontrols in this situation.
Life Cycle: Female Aphelinus lay its eggs directly inside of a host aphid. When the egg hatches, the larva consumes the body contents, eventually killing the host when the larva is full grown. Once the host aphid dies, the distinctive black mummy is formed (about 7 days from when the egg was layed at 70° F). In about 14 more days, the adult wasp will emerge from the mummy. Adult Aphelinus will also feed on smaller aphids, consuming about 2 per day.
For Best Results: You should not use Aphelinus for control of the cotton aphid, melon aphid, green peach aphid, or tobacco aphid. It is also not recommended to use in high aphid populations, but rather for preventative measures when rates are low to moderate. If aphid populations are high, use in conjunction with other aphid predators and parasites.
