38 HORTICULTURIST'S RULE-BOOK. 



of two weeks after the nymphs appear, before they are 

 protected by honey dew. During midsummer a forcible 

 spray will destroy a very large proportion of the adults. 



ROSE-BEETLE. See under ROSE and APPLE. 



ROUNDED-HEADED BORER. See under APPLE. 



SLUG. See under CHERRY. 



TWIG-GIRDLER (Oncideres cingulatus, Say). A brownish- 

 gray beetle, about one- half inch long, which girdles twigs 

 in August and September. The female lays eggs above the 

 girdle. The twigs soon fall. 



Remedy. Burn the twigs, either cutting them off or 

 gathering them when they fall. 



TWIG-PRUNER. See under APPLE. 

 Persimmon. TWIG-GIRDLER. See under PEAR. 

 Pineapple. KATYDID (Acanthacara similis). A large katy^ 

 did which attacks, among other plants, the leaves of the 

 pineapple. 



Remedy. Arsenites, before the plants are mature. 

 Plant-Lice. See APHIDES. 

 Plum. BUD-MOTH. See under APPLE. 



CANKER-WORM. See under APPLE. 



CURCULIO (Conotrachelus nenuphar, Herbst.). Larva, a 

 whitish grub, feeding in the fruit. 



Remedies. Arsenites ; apply as soon as the calyx falls 

 and repeat two or three times at intervals of about ten days. 

 Plaster and carbolic acid mixture. Jarring the beetles on 

 sheets very early in the morning, beginning when trees are 

 in flower, and continuing from four to six weeks, is prob- 

 ably the most sure procedure. There are various styles of 

 sheets or receptacles for catching the insects as they fall 

 from the tree. Catching beetles under chips or blocks 

 about base of tree, the insects being taken very early in 

 the morning. 



FLAT-HEADED BORER. See under APPLE. 



PEAR-TWIG BEETLE. See under PEAR. 



PLUM-GOUGER (Coccotorus scutellaris, Lee.). A small 

 larva, feeding upon the kernel of the plum. The beetle 



