from an apple tree on two sides has been found to destroy all the ground form of the woolly aphis.
- The Hop Aphis (Phorodon After the Coccidae the next most important insects male; C, ovigerous wingless female; economically are r the plant lice or A phididae.
An example of the latter is seen in the hop aphis FIG.
Another aphis of importance is the woolly aphis (Schizoneura lanigera) of the apple and pear: it secretes tufts of white flocculent wool often to be seen hanging B D E humuli).
Genera: Blatta, Mantis, Gryllus, Fulgora, Cicada, Notonecta, Nepa, Cimex, Aphis, Chermes, Coccus, Thrips.