Aphelinus abdominalis is a parasitic wasp, used in the biological controlling of aphids like Macrosiphum euphorbiae and Aulacorthum solani. Adults are 2.5 – 3 mm. in size with a black thorax, yellow abdomen, short legs and short antennae. All other stages develop within the host.
Life cycle and relative effectiveness
Female adults lays their eggs inside the aphids. Subsequently, a parasitic wasp develops within the aphid. Besides, adult Aphelinus consume some aphids for host feeding. A parasitized aphid changes to a leather-like black coloured mummy. When the parasitic wasp has developed itself into an adult, it leaves the mummy, leaving an unequally notched hole at the back of the mummy. Within 10 days after introduction of Aphelinus abdominalis in the crop the first mummies emerge in the crop.
Application and dose
Due to the immobility of Aphelinusabdominalis, make sure the material will be placed into affected plants. Females parasitize the aphids for quite a long period, sometimes even two months. For the use of Aphelinus, no specific conditions are required.
Storage and handling
Aphelinus abdominalis supplied in bottles (100-250 ml.), containing 500 adults. Keep the bottles horizontally, in darkness, at a temperature between 8°C – 10°C. Maximum storage time of two days.