86 



Tree No. 21. — A fifteen-foot peach-tree, with an eig-ht-inch 

 trunk and an eig"hteen-foot top; in g"ood condition, and but moder- 

 erately infested. This received the same water treatment as No, 27 

 of Lot 2, namely, one application of fifteen gallons of water on the 

 fifth day after the insecticide. Thirty-one per cent, of the scales 

 were alive in the beg^inningf. None of them appeared to have been 

 killed on the second day thereafter, but 90 per cent, of these were 

 dead on the fifth day, and 97 per cent, on the twentieth day. 



Tree No. 22. — K peach-tree, thirteen-feet hig-h with a six-inch 

 trunk and a twelve-foot spread; in poor condition, thoug"h but mod- 

 erately infested Treated but once, and that on the tenth day after 

 the insecticide application, fifteen g-allons of water being- used. 

 The corresponding- tree of the second lot was No. 35. Forty-four 

 per cent, of the scales alive in the beg-inning-; 88 per cent, of these 

 dead on the fifth day, 90 per cent, on the thirteenth, and 98 per 

 cent, on the twentieth day. 



Tree No. 2j. — A fifteen-foot apple-tree, with an eig-ht-inch 

 trunk and a fifteen-foot top; in poor condition, moderately infested. 

 This, like 32, treated with three daily water sprays of fifteen g-al- 

 lons each on three days immediately following the insecticide 

 treatment— a duplicate in this respect of No. 32 of the second lot. 

 Forty-nine per cent, of the scales alive in the beginning; 65 per 

 cent, of these dead on the fourth day and 88 per cent, on the thir- 

 teenth, and 88 per cent, again on the twentieth day. August 20, 

 one hundred scales examined; none alive. 



yyer No. 2^. — A sixteen-foot peach-tree, with a six-inch trunk 

 and a nine-foot top; in fair condition, moderately infested. Treated 

 on two successive days, immediately following the insecticide appli- 

 cation, with fifteen gallons of water on each day, the second of these 

 treatments coinciding with the first day of raia. Forty-two per 

 cent, of the scales alive in the beginning; 38 per cent, of these dead 

 on the second day, 92 per cent, on the fifth, and 96 per cent, on the 

 twentieth, the final result being the destruction of 95 per cent, 

 of the scales. May 12, 99 per cent, of the scales on this tree had 

 been killed. August 20, two hundred scales were examined; none 

 alive. 



Tree N^o. 26. — A twelve-foot peach-tree, with a six inch trunk 

 and an eleven-foot top; in very poor condition, though but moder- 

 ately infested. Treated, like No. 36 of the second lot, with fifteen 

 gallons of water on the day following the insecticide application, 

 and another fifteen gallons on the ninth day thereafter, that is, the 

 15th day of March. This last treatment coincided with the third 



