24 HORTICULTURIST'S RULE-BOOK. 



ROSE-BEETLE. See under ROSE and APPLE. 

 SLUG (Selandria Cerasi, Peck). Larva, one-half inch 

 long, blackish and slimy, feeding upon the leaves; two 

 broods. 



Remedies. Arsenites, for the second brood (which 

 usually appears after the fruit is off), and for the first 

 brood if the trees are not bearing. Hellebore in water. 

 Pyrethrum. Air-slaked lime. Road-dust. Catch mature 

 insects by jarring trees late in the evening or early in the 

 morning. 



Chestnut. WEEVIL (Balaninus sp.). A grub working in 

 chestnuts, making them wormy. The weevil is a curculio- 

 like insect. 



Preventives. Destroy wild trees where the insects 

 breed. Plant the most immune varieties. 



Remedy. Gather and destroy the infested nuts immedi- 

 ately after they fall. 

 Chrysanthemum. GREEN LETTUCE-WORM. See under 



LETTUCE. 



CHRYSANTHEMUM LEAF-MINER (Oscinis sp.). Works upon 

 the leaves of the chrysanthemum. 



Remedy. Hand-picking. 



Corn. BUD- WORM. See TOMATO FRUIT- WORM. 

 CORNSTALK-BORER (Helotropha atra, Get.). Larva, gray 

 and striped, boring into the stalk. 



Remedies. See CUT- WORM. 



GRAIN-APHODIUS (Aphodius granarius, Linn.). Beetle, one- 

 eighth inch long, shining black, feeding on kernels in the 

 ground before they sprout. 



Remedy. Soak kernels in water, then stir them in a 

 mixture of Paris green, one part to twenty parts of flour. 

 ROOT WEB- WORM (Crambus sp.). Larva feeding in a web 

 on the surface or just below it, on the roots of corn. 



Preventive. Avoid planting corn on sod land where 

 there is any suspicion of the insect having been at work. 

 Fall ploughing. 

 WEEVIL or GRAIN-BEETLE (Silvanus Surinamensis, Linn.). 



