870 EXPERIMENT STATION RECORD. 



which were badly infested with cabbage worms, and 3 days after treat- 

 ment not a single living worm could be found. In 189G and subse- 

 quently it was extensively tested on cabbage, cauliflower, and Brussels 

 sprouts, and in every case when properly applied gave good results. 

 During the fall and winter of 1897-08 it was tested on lettuce grown in 

 forcing houses with good results, but the author does not recommend 

 it for this purpose, as he thinks that the adults could be kept out of 

 forcing houses by the use of mosquito netting to better advantage. 



The experiments, which have been conducted on a considerable scale, 

 indicate that the cost per acre of material and labor for 2 applications 

 of this fungicide to cabbage or cauliflower would be about $2. Power 

 spraying pumps can not be used for spraying cabbage or cauliflower, 

 owing to the method of growth. 



The life history of the 2 most serious insect pests to cabbage and cau- 

 liflower growing is given and detailed recommendations made for the 

 application of the insecticides. The use of arsenites on such crops as 

 these is attended with some danger, but the author states that if the 

 directions given are carefully followed no ill effects will result. It 

 is explicitly stated that this mixture should not be used on cabbage 

 after the heads are two-thirds formed; that only skillful and intelligent 

 laborers should be trusted with the application of it on cauliflowers, 

 and that it should never be applied after the "flower" has commenced 

 to form. For the heading varieties of lettuce it can be safely used 

 until the plants are one-third grown; to other varieties it should never 

 be applied. 



Spraying, J. Craig- (Canada Expt. Farms Rpt. 18.97, pp. 105-110). — 

 The apple orchards on the Central Experimental Farm were sprayed 4 

 times with Bordeaux mixture, and Paris green, and as a result of this 

 work it was difficult at harvest time to find an imperfect specimen of 

 fruit. Comparisons were made of using lysol and formalin in different 

 strengths, the results indicating that lysol does not posesss qualities 

 superior or equal to any of the present standard insecticides. With for- 

 malin some deterrent influence against the codling moth was noted, but 

 it is hardly equal as an insecticide to some of the arsenites. A compar- 

 ison was made of Bordeaux mixture containing Paris green and of Paris 

 green in water. In reporting the experiments the author states that 

 it will not pay a fruit grower to incur the expense involved in making 

 a separate application of Paris green in view of the very doubtful bene- 

 fits derived. Different formulas of Bordeaux mixture were compared, 

 the one containing 6 lbs. copper sulphate and the other 4 lbs., and when 

 applied to crab apple trees the weaker solution was found to be equally 

 as efficient as the stronger, and did not injure the foliage. Experiments 

 with arsenate of lead, which were continued from the previous year, 

 indicate that this is a very effective remedy against the codling moth. 

 Arsenate of lead in combination with Bordeaux mixture was sprayed 

 on a number of crab apple trees with disastrous results, seeming to 

 indicate that this combination is injurious to both foliage and fruit. 



Experiments are reported in which different fungicides were employed 



