. Ontario Sessional Papers, 1919, . Xitrate of Soda when the bulbs were forming and results justify ourtrying it out more completely this year. Black Heart in celery can be controlled by the use of Black Leaf 40 inthe Bordeaux Spray—i oz. to 40 gallons Bordeaux. Our work this year shows thatthis disease may be caused by both the Tarnished Plant Bug and a black-greenaphid. On a patch containing 352 dozen we had a loss of 5 dozen due to BlackHeart, after careful successive spraying. Spraying started June 9th and endedAugust 9th; 9 times, 54 gals. Bordeaux, 7l/o gals. Black Leaf 40; co?t
. Ontario Sessional Papers, 1919, . Xitrate of Soda when the bulbs were forming and results justify ourtrying it out more completely this year. Black Heart in celery can be controlled by the use of Black Leaf 40 inthe Bordeaux Spray—i oz. to 40 gallons Bordeaux. Our work this year shows thatthis disease may be caused by both the Tarnished Plant Bug and a black-greenaphid. On a patch containing 352 dozen we had a loss of 5 dozen due to BlackHeart, after careful successive spraying. Spraying started June 9th and endedAugust 9th; 9 times, 54 gals. Bordeaux, 7l/o gals. Black Leaf 40; co?t, $;Labour. $; total, $ Great care, however, must be taken during blanching,as the conditions at that time are favourable for the spread of the disease. It isnecessary to prevent any sweating. That Celery Blight can be cured by Bordeaux Mixture has been amplv demon-strated again this year. The addition of Distillate Paraffin Oil as a sticker wastried, but proved unsatisfactory because it burned the foliage. Du-ting with sul-. Spraying Outfit. pliur and lime dust was also tried and proved satisfactory. Xext year we hope tocarry on this dusting work on a larger scale. AVork was carried on at London withFormalin treatment—1 pt. to 20 gals, water. This wa? done on Mr. Geo. Bycroftspatch and one application proved satisfactory, although some slight burning wasoccasioned where too much liquid was applied or the spray coarse. This methodis also worthy of further trial especially where the disease has only obtained aslight hold on the patch, as it kills immediately. It should be followed with Bor-deaux mixture. Considerable success has been obtained in the Province in the control ofTomato Mildew in Greenhouse by burning Sulphur on a shovel. A teaspoonful ofSulphur is wrapped in paper, then set fire to and while it slowly burns a mancarries it up and down the alleys in the house. Aphids on Cabbage and Potatoes were completely controlled by the use of Black Leaf 40. 1 pt
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