FROM his morphological investigation of the black bean aphid, Aphis fabae Scop., Weber 1 concluded that the stylets do not contain nerves, and he showed the central mandibular duct to be empty.
IT has previously been reported that sodium fluoroacetate is a very effective systemic insecticide against Aphis fabae Scop. 1,2. Unfortunately, its use cannot be recommended since it is a very ...
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