RUSTY-BROWN PLUM LOUSE 



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The Rusty-brown Plum Louse (Aphis setarice Thomas). This 

 rusty-brown aphid has the base of the antennae white, which color 

 also appears on the legs and on the posterior end of the insect. 

 It is first observed in early spring on tender shoots of the plum, 

 secreting honey dew in abundance. Its secretion frequently causes 

 the upper surface of the leaves below the lice to present a shiny, 

 glistening effect. 



FIG. 145. Plum gouger, adult, larva, and injured fruit. (Lugger.) 



These lice remain on the plum during the entire year, but 

 grasses may be also attacked during the summer. As summer 

 advances, many of these insects may become a deep black; in fact, 

 the egg-laying females and the true males are strikingly black. 

 The oviparous female is wingless, while the male is winged. 

 Winged forms are produced at different times during the summer 

 or fall. 



