INSECTS INJURIOUS TO FRUITS. 



97 



and is not found on the Pacific coast, but it has been intro- 

 duced into California and foresighted growers there are prac- 

 ticing grafting their vines on resistant roots. Bi-sulfate of car- 

 bon placed in the ground about the roots is a good remedy. 

 Probably the best treatment for the leaf form is to pick and 

 destroy the infested foliage. 



The Rose Chafer or Rose Bug (Macrodactylus subspinosus) 

 eats roses, the flowers of the grape, and, when very abundant, 

 many other garden plants. It is a beetle with long, hairy legs 

 which is rather slow in its movements. It is especially injurious 

 by reason of its eating the flowers of grapes. 



Remedies. — "Where they are very abundant, insecticides are 

 too slow in acting to do much good and all remedies fail. Where 

 not unusually abundant, they may be kept in check by picking. 

 Covering the flowers with bags has also been resorted to with 

 excellent results. Bordeaux mixture seems to be distasteful to 



them and spraying 

 with this material will 

 often largely prevent 

 their ravages as well 

 as check fungus dis- 

 eases. 



Other insects injuri- 

 ous to the grape are 

 the Snowy Tree Crick- 

 et and occasionally 

 some scale insects and 

 leaf eating insects. 

 Insects Injurious to the 

 Currant and 

 Gooseberry. 

 The Currant Worm 

 (Nematus ventricosus) 

 is the most trouble- 

 some insect that at- 

 tacks the currant and gooseberry. The female lays her 

 eggs In rows on the veins on the under side of the 

 leaves quite early in the season. They are white in color 



Fig. 39.— Currant Worm. Eggs of •worm 

 on under side of midribs; holes in 

 leaves gnawed by young larva. 



