Injurious Insects. 



39 



Turnip. Maggot.— See under Cabbage. 



Weigelia. Four-striped Plant-Bug. — See under Currant. 



White Ants, or Termites.— These insects often infest orchard 



trees in the southern states, particularly in orchards which 



contain old stumps or rubbish. 

 Remedy. — The soap-and-arsenites wash brushed over the 



trunk and branches of the tree. 

 Willow. Willow- Worm (Venessa antiopa. Linn.) . — Larva, nearly 



two inches long, black, feeding upon leaves of willow, elm 



and poplar ; two broods. 

 Remedy. — Arsenites. 

 Wire-Worm (Various species) .—Slim and brown larvae, feeding 



upon the roots of various plants. They are the larvae of the 



click-beetle or snapping-beetle. 

 Remedy. — Arsenites sprinkled upon baits of fresh clover or ' 



other material which is placed about the field under blocks 



or boards. Sweetened corn-meal dough also makes a good 



bait. The best treatment is to plow infested land in the fall. 



A system of short rotations of crops will greatly lessen 



injury from wire-worms. 



Inasmuch as the growth of one year determines {he possibility of 

 a crop in the succeeding year > it follows that spraying, which insures 

 healthy foliage, may show its greatest result in the following year. 

 This secondary result of spray ing — its influence in determining pro- 

 ductiveness — is fully as important as its immediate result in securing 

 fair fruit ; and it emphasises the importance of spraying even when 

 there is no fruit. Spraying sometimes fails, hut there is no horticul- 

 tural practice which is surer to bring good results. 



