15 



the locusts fall down, roll once upou their sides or backs, jerk their legs 

 occasionally, and gradually become quiet. They remain in this condi- 

 tion for a longer or shorter time, and gradually recover, but sometimes 

 a whole day or a day and a half passes after the application has been 

 made before the locusts have wholly recovered from the effects of it.* 



Although the locusts are not killed by a single application of the 

 Buhach in either of the forms mentioned above, still they do not enjoy 

 the same immunity when treated with an alcoholic extract of Buhach ; 

 a few drops of this extract was dropped upon an adult locust at 1 

 o'clock in the afternoon, and early the next morning the locust thus 

 treated was dead. This extract is much stronger than the solution of 

 Buhach and alcohol described above, and costs about $3 a pint. It 

 failed to have a fatal effect upon the locusts when diluted with water 

 to any considerable degree. 



For the destruction of locusts and other insects that the Buhach will 

 not kill outright, it may still be used with advantage by spreading 

 blankets upon the ground beneath the tree or shrub infested with these 

 insects, and then dusting the latter with the Buhach, or spraying with 

 one of the solutions ; this will have the effect of causing the insects to 

 fall upon the blankets in a perfectly helpless condition, when they can 

 easily be gathered up and be destroyed by burning or otherwise. 



In order to give some idea of what success other persons have met 

 with in using Buhach for the purpose of destroying various kinds of 

 injurious insects, I will give a few extracts from communications made 

 by the parties using this insecticide. 



The following is extracted from a communication which appeared in 

 the Pacific Rural Press of January 6, 1883 (p. 12): 



"The Buhach powder was mixed with cold water in the proportion of 1 

 pound of powder to 50 gallons of water. On the 14th iustant I sprayed 10 

 apple trees, the branches of which were literally covered with the Cucum- 

 ber-beetle (Diabrotica vittata), and the result was that these pests im- 

 mediately fell to the ground in myriads. The spraying was done with 

 a Merigot pump, and the trees were covered a short time only with a 

 fine mist. Although several gallons were mixed, probably not over one 

 gallon was used. I placed in a small box a number of the beetles that 

 had been touched by the spray, and up to the present time all efforts 

 to resuscitate them have failed. A small number of the insects which 

 were not touched by the spray were placed in a phial, and are still liv- 

 ing. The Cucumber-beetle plays havoc with pear blossoms and is other- 

 wise destructive, and judging from the very signal success of my late 



"Locusts appear to be eudowed with more life than the generality of insects. On 

 one occasion I saw a hind leg of a Differential Locust (Caloph nus differentialis Thorn.) 

 move after it had been separated from the body for several hours. The femur would 

 draw the tibia toward it, then move it back again ; and the last movement of t his 

 kind that I saw it make occurred eight hours after the leg had been separated from the 

 bod v. 



