326 STATE HORTICULTURAL SOCIETY 



Tomato. — For the tomato worm and tomato rot, spray with Bordeaux 

 mixture and Paris green. 



Cucumhers and Squashes. — Apply plaster and Paris green for the 

 striped beetle while dew is on. Trap black bugs under shingles, and 

 spray with gasoline and water (one to eight), mechanically mixed. If 

 mildews and other fungous diseases appear, spraj^ with Bordeaux mix- 

 ture and liver of sulphur. 



REMEDIES. 

 INSECTICIDES. 



For nearly all insects that eat the foliage, or other exposed portions of 

 the trees, some material should be used that will poison them, and for 

 this purpose the arsenites are generally resorted to. Paris green con- 

 tains, when pure, rather more than fifty per cent of arsenic, and, being but 

 slightly soluble in water, is not injurious to anything except the most 

 tender foliage. This tendency to burn the foliage can be counteracted by 

 the addition of a small amount of lime. The use of lime with Bordeaux 

 mixture is of value also, from the fact that it cements the poison upon the 

 leaves and renders its effect much more lasting. For many of the fruits, 

 and other plants, Paris green can be combined with Bordeaux mixture to 

 good advantage, as the two can be applied at one time, and the lime of 

 the Bordeaux mixture will render the addition of more lime unnecessary. 

 London purple, which is an arsenite of lime, while Paris green is an 

 arsenite of copper, is often used instead of Paris green, but is rather less 

 effective as an insecticide, and, being slightly more soluble, is more likely 

 to injure the foliage. When Paris green costs more than ten cents per 

 pound, in large quantities, white arsenic will be found a cheap and 

 effective substitute for it. As the cost of the two materials is about the 

 same per pound, and, as the Paris green is about one half arsenic, the 

 latter will go twice as far, and hence be but one half as expensive. 



The following formula for preparing the above insecticide can be used 

 for all our fruits with safety, and, in case the insects have become numer- 

 ous and destructive, it would be safe, except on the peach, to increase 

 the amount of poison one half; wliile against the potato beetle the 

 amount of poison can be doubled. 



Paris green (or London purple) 1 pound 



Lime 5 '' 



Wat'n- 200 gallons 



Formula for white arsenic and lime mixture: 



White arsenic 1 pound 



Lime 10 " 



Water 400 gallons 



In ])re]»aring Ihe lime and arsenic mixture, add two ])ounds of lime 

 and one pound of white arsenic, to two gallons of hot water, and boil it 

 for at least thirty minutes. This should be added to 400 gallons of 

 water, and eight pounds of lime additional used. Care should be taken 



