100 



of these 2 or 3 rnen could get over a considerable number of young 

 trees in a day. 



Thestrawbt rry root-louse (Aphis forbesi.) — Various means of destroy- 

 ing the strawberry root-louse upon plants prior to setting have been 

 thoroughly tried. Sixty thousand plants were fumigated in two lots 

 in a nurseryman's fumigation house for thirty and forty minutes with 

 0.2 gram KCN per cubic foot without injury to the plants, and the 

 lice were killed as far as observed. The plants were laid loose, one 

 or two layers deep, on frames of wire netting. Subsequently 7,000 

 were fumigated in several lots in a small box containing 10 cubic feet 

 ■for thirty minutes with 0.2 gram KCN per cubic foot and 0.3 gram 

 KCN for twenty-five minutes without injury to the plants. 



From 20 to 75 per cent of plants dipped in whale-oil soap, 1 pound 

 to 6 gallons of water, were killed, as were from 50 to 75 per cent of 

 various lots dipped in kerosene emulsion diluted 10 times. Tobacco 

 water (1 pound of stems boiled in 1 gallon of water, used undiluted) 

 was this year used as a dip by a number of large growers with marked 

 success. The beds of one party who has used it for several years 

 showed its good effect. Plants dipped in Rose Leaf insecticide, 1 

 part to from 20 to 10 of water, were uninjured and the lice were 

 killed. The main difficulty in fumigating or dipping prior to setting 

 is that growers are desirous of sotting early, and as with many insects 

 a few of the eggs do not hatch until unusually late, dipping or fumi- 

 gating at the time the growers wish to plant does not destroy these. 

 To destroy the eggs we have tried burning over the beds, as the eggs 

 are all upon the leaves as far as observed. By covering with straw 

 or similar material which will make a quick tire and burning over just 

 as the plants commence to grow in the spring, the foliage can be 

 burned off without injury to the crowns and the plants will shoot out 

 again, giving a good foliage by the time it is desired to set them in a 

 new bed, and producing fruit the same as if unburnt, except perhaps 

 being a trifle later. The burning should also be of value against other 

 strawberry insects and diseases. 



Thecodling moth. — In experiments with remedies for the codlingmoth 

 in 1901 it was found that two bands on a tree caught 15 per cent of the 

 larvae infesting apples upon 5 trees, the percentage varying from S to 

 25 per cent, varying almost exactly inversely 7 to the effectiveness of 

 the spray used. Numerous larva? and pupae were collected from these 

 bands, and it was found that a very large percentage hibernated over 

 winter, there being, therefore, but a partial second brood. 



Our chemist has kindly analyzed samples of two lots of arsenite of 

 lime and one of arsenite of soda, made according to the usual for- 

 mulas, with pure arsenic and boiled by steam, and in each case they 

 contained but three-fourths the supposed amount of arsenious acid. 

 The arsenite of lime was used last year at a strength equivalent to 1 



