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LXII. On the Application of Tobacco Water in the destruc- 

 tion of Insects. In a Letter to the Secretary. By Mr. 

 Joseph Harrison. 



Read August 15, 1826. 



Sir, 



It is with pleasure I transmit to you the following statement 

 of an easy and successful method of destroying the Green 

 Fly, w hich so generally and severely attacks Peach and Nec- 

 tarine Trees, also the Black Insect, which attacks the young 

 shoots of Cherry Trees, and the different kinds of Caterpil- 

 lars infesting Apple, Pear, Plum, and Apricot Trees, and 

 Gooseberry Bushes. 



The means which are generally applied for the destruction 

 of the insects above named, I have uniformly found do not 

 effect the desired purpose, without the trees suffering in 

 consequence of the damage or destruction of the shoots, 

 foliage, young fruit, or blossom, 



Having had the opportunity of trying various experiments 

 upon the fruit trees under the care of my father at Wortley 

 Hall, in order to discover what would effectually destroy the 

 insects without injuring the trees, I find that the Tobacco 

 water hereafter named, and applied as directed, answers the 

 desired purpose, for whilst it entirely destroys the insects, 

 the trees are in no way injured by the infusion, however 



