✦ LIBER ✦

Episyrphus balteatus as a predator of the aphid Sitobion avenae on winter wheat

✍ Scribed by G. W. Ankersmit; H. Dijkman; N. J. Keuning; H. Mertens; A. Sins; H. M. Tacoma

No coin nor oath required. For personal study only.

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