120 NATURE-STUDY REVIEW [16:3— Mar.. 1920 



Paris green at the rate of one pound to 50 gallons of water is 

 an efficient poison for this insect but this amount should be applied 

 to each acre of potatoes. Where Bordeaux mixture is used on 

 potatoes for the blight, the Paris green may be combined with it. 

 If the poison is used alone it will be best to add two or three pounds 

 of quick lime to prevent any burning of the plants. If paste arsen- 

 ate of lead is used, at least four pounds to 50 gallons of water or of 

 Bordeaux mixture will be necessary. The first application of 

 poison should be made early while the plants are small. 



Paris green may be combined with flour or air-slaked lime at 

 the rate of one pound of the former to 20 pounds of the latter and 

 dusted on the plants from a muslin bag preferably while the dew 

 is on. Powdered arsenate of lead at the rate of 1% pounds to 

 20 pounds of lime can be used in the same way. 



The Potato Flea Beetle: This isn't much larger than a flea and i L 

 acts very much like one when disturbed, for it is only about one- 

 sixteenth of an inch in length and has very strong hind legs and it 

 is indeed very hard to catch for it is a famous jumper. They are 

 black and sometimes occur in great numbers on potatoes, toma- 

 toes, and egg-plants to which they are very destructive. They 

 live on the undersides of the leaves and finally cause the foliage 

 to become fairly riddled with small, shot-like holes. The leaves 

 wither and roll up and the plant when badly injured looks as 

 though it had been scorched. 



The most effective way to control the flea bettle is to keep the 

 plants covered with Bordeaux mixture. The plants should be 

 sprayed every 10 to 14 days for the blight and pains should be 

 taken to cover the under sides of the leaves. Poisons do not seem 

 to be effective although when they are used for the Colorado potato 

 beetle probably some flea-beetles are also killed. 



Enemies of the Tomato 



The tomato seems to be a plant attractive to several insects all of 

 which do it much damage. The potato flea beetle just described 

 likes the tomato as well as it does the potato. The cut worms also 

 mow down in the night many young tomato plants. The methods 

 of fighting the flea beetles and cut worms have been described. 



The Tomato Fruit-worm: This is the young of a rather hand- 

 some brown moth and eats cavities into the sides of both ripe and 

 unripe fruits. When young it may attack the stems and leaves 



