34 



The Horticulturist's Rule- Book. 



Pear, continued. 



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 gather- 

 ing them when they fall. 

 Twig-Pruner.— See under Apple. 

 Persimmon. Twig-Girdler. — See under Pear. 

 Pineapple. Katydid (Acanthacara similis). — A large katydid 

 which attacks, among other plants, the leaves of the pine- 

 apple. 



Remedies. — 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 whit- 

 ish 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. 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 bores a 

 round hole in the plum, instead of making a crescent mark 

 like the curculio. 



Remedy. — Same as for curculio. 



Twig-Pruner. — See under Apple. 



Slug.— See under Cherry. 



Poplar. Cottonwood Leaf-Beetle (Lina scripta, Riley). — A 

 striped beetle feeding on the leaves and shoots of poplars 

 and willows. 



Remedy. — Arsenites. 

 Willow-Worm.- -^ee under Willow, 



