Leaf Hopper 153 



leaves. These quickly hatch and the larvae feed on the 

 tissues of the leaves, puncturing them full of holes. There 

 is a second brood of the beetles which appears about the 

 middle of July. Spraying with arsenical materials will de- 

 stroy this troublesome little pest. 



Rose Chafer. This is a long-legged, awkward-looking 

 beetle which attacks a great many different kinds of plants 

 during the summer. It responds very slowly to any poisons, 

 so that in small areas hand picking of the insects is prob- 

 ably the best treatment. In commercial plantations spray- 

 ing with arsenate of lead will keep the insect under con- 

 trol. 



Berry Worm. There are two kinds of insects which 

 cause worms in the berries of grapes. One of these is the 

 larva of a moth. This worm is about half an inch long, 

 of a bluish black color, that spins a web and lets itself to 

 the ground. The other is the grub of the ctirculio. Some 

 seasons either or both of these insects may be very numer- 

 ous, while in others they will be of no consequence. Thor- 

 ough spraying with arsenate of lead will give quite effec- 

 tive control of both insects, although the curculio can be 

 more effectively controlled if the vineyard is kept in clean 

 cultivation, and the soil stirred quite frequently during the 

 middle and latter portions of the summer. This will bring 

 to the surface of the scil the pupal cells of the insect, which 

 will perish upon exposure to the light. Spraying with 

 arsenate after the fruit sets and again when the berries are 

 about half grown will help in controlling these insects. 



Leaf Hopper. This is a very small, inconspicuous in- 

 sect that jumps from the leaves of the vine when disturbed. 

 It comes in great swarms and does great damage to the 

 vines by sucking the juice of the foliage frojn the under 

 side. Thorough spraying with kerosene emulsion at the 

 rate of one to ten, is the most effective means of con- 

 trolling it. In applying the spray it needs to be done with 

 3">od pressure and through a fine nozxle so as to fill the 

 air with a mist. Those ins 2:: s which a r e not hit while on 

 the vine will get more or less upon themselves as they hop 

 through the mist, and be destroyed. 



