Sitobion fragariae Walker Blackberrycereal aphid

This species overwinters in the egg stage on blackberry, where heavy infestations in spring cause significant leaf damage and also depress fruit yields. In summer, colonies develop on various cereals and grasses, which act as secondary hosts. Although often invading the ears of wheat and other members of the Poaceae, the aphids are rarely numerous and, although capable of transmitting viruses (e.g. BYDV), are of only minor importance. Apterae on blackberry are broadly spindle-shaped, 2-3 mm long, shiny yellowish-green with dark or mainly dark siphunculi (cf. bramble aphid, Amphorophora rubi, p. 105). Those on cereals and grasses are smaller and mainly dirty greenish; they are distinguished from Sitobion avenae (above) by the longer siphunculi (about twice as long as the cauda) and by the pale basal segments of the antennae.

Building Your Own Greenhouse

Building Your Own Greenhouse

You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!

Get My Free Ebook

Post a comment