124 PLUM, PEACH, AND CHERRY INSECTS 



blue abdomen of the female, however, lacks the yellow band seen 

 in the eastern form. 



The same measures of control as employed against the eastern 

 form are adaptable in the case of this west coast species. See 

 treatment for peach-tree borer. 



The Peach Twig-borer. This small gray moth (Anarsia 

 lineatella Zell), barely one-half an inch from tip to tip of extended 

 wings, is an importation from Europe and a serious peach pest in 

 many of our states, particularly on the Pacific coast. 



The brownish larva is about one-half an inch long when adult. 

 During its active life it bores in the pith of tender growth, causing 

 the tips of branches to wither and die (Fig. 147). The insect at 

 this stage is very active and voracious, and crawls from twig to 

 twig, causing extensive injury. It pupates under scales of bark on 

 large branches. The female moth lays her 

 white eggs on the young twigs. About ten 

 days are required for hatching. 



Fruit may be attacked by the second brood 

 of caterpillars, and the third brood feed entirely 

 on the fruit. A fourth brood of caterpillar 

 gives rise to the moths whose eggs, placed in 

 cracks in the bark, produce the caterpillars 

 which winter over in bark close to the young 



FIG. 147. The peach PTOWth. 



twig-borer. ... , 



Control Measures. The best measure of 



combating this pest is by the use of frequent winter sprayings of 

 lime-sulfur. Use one part commercial lime-sulfur to ten of water. 

 In the spring, from the time of the swelling of the buds until the 

 blossoms begin to appear, a little later, just as the blossoms show 

 pink, arsenate of lead may be applied at the rate of five or six 

 pounds in fifty gallons of water. 



Terrapin Scale or Peach Lecanium. This is a turtle-shaped 

 or terrapin-shaped scale (Lecanium nigrofasciatum Perg.) about 

 one-eighth of an inch long when full grown. It is brownish or 

 reddish in color; individuals may be found which are nearly 

 black. The young hatch beneath the mother scale and attach 

 themselves to the leaves later. After the females have been fertil- 

 ized by winged males, they migrate to the twigs and branches. 



Control Measures. Spray with miscible oils when the trees are 

 dormant. Care has to be observed in using this spray on the peach. 

 It should not be used in the fall, but is best applied in early spring. 



