Injurious Insects. 



37 



Rose, continued. 



Rose-Beetle, Rose-Chafer or 4 'Rose-Bug" (Macrodactylus 

 subspinosus, Fabr.). — Beetle three-fourths inch long, light 

 brown, feeding upon the leaves, blossoms and fruit. 



Remedies. — Hand-picking. Knocking off on sheet early in 

 morning. Bagging. Pyrethrum. Kerosene emulsion. Py- 

 rethro-kerosene emulsion. Eau celeste. It is said to prefer 

 Clinton grapes, spireas, rose-bushes and magnolias, and it has 

 been suggested that these plants be used as a decoy. Open 

 vials of bisulphide of carbon hung in bushes and vines are 

 recommended by some. Sludge-oil soap, a manufactured 

 material. Spraying with dilute lime whitewash. Hot water, 

 at a temperature of 125° to 130° Fahr. To prevent the insects 

 from breeding, keep the light lands — in which they breed — 

 under thorough cultivation, and especially never seed them 

 down. 



Rose Leaf-Hopper (Tettigonia rosce) .—Hopper, very small, 

 white, often mistaken for thrips ; lives on the leaves of roses. 

 Various stages of growth may be found in the leaves through- 

 out the summer, and even on indoor plants. 



Remedies. — Whale-oil soap. Kerosene. Kerosene emulsion. 

 Nicotyl vapor. 



Snails.— These animals are often very troublesome in green- 

 houses, eating many plants voraciously. 



Preventives. — Trap them by placing pieces of turnip, cab- 

 bage or potatoes about the house. Scatter bits of camphor- 

 gum about the plants. Strew a line of salt along the edges 

 of the bed. 



Strawberry. Strawberry Crowx-Borer (Tyloderma fragarice, 

 Riley).— White grub, one-fifth inch long, boring into the 

 crown of the plant in midsummer. The mature insect is a 

 curculio or weevil. 



Remedy.— Burn over the field after the fruit is picked. If 

 this does not destroy the insects, dig up the plants and burn 

 them. 



Grub or Mat-Beetle.— See under May-Beetle. 



Strawberry Leap-Roller (Phoxopteris comptana, Frol.). — 

 Larva, less than one-half inch long, feeding on the leaves, 

 and rolling them up in threads of silk ; two broods. 



Remedies.— In first stage of attack apply hellebore. Burn 

 the leaf -cases. 



