. The American florist : a weekly journal for the trade. Floriculture; Florists. VIEW OF THE LORD & BURNHAM HOUSE COMPLETE. be carefully done to avoid tearing the foliage. Water must be directed against the lower surfaces of the leaves with the object of destroying the j'oung thrips as soon as they hatch, for it has been found that adult thrips are difficult to kill with water. After June 1 the plants were thorough- ly sprayed twice a week and syringed with water to remove the insecticide. When examined .Tune 5 and 15 the plants were so entirely free from thrips as to make it almost imposs
. The American florist : a weekly journal for the trade. Floriculture; Florists. VIEW OF THE LORD & BURNHAM HOUSE COMPLETE. be carefully done to avoid tearing the foliage. Water must be directed against the lower surfaces of the leaves with the object of destroying the j'oung thrips as soon as they hatch, for it has been found that adult thrips are difficult to kill with water. After June 1 the plants were thorough- ly sprayed twice a week and syringed with water to remove the insecticide. When examined .Tune 5 and 15 the plants were so entirely free from thrips as to make it almost impossible to find any specimens on them. The removal of the bed of old plants mentioned above elimi- nated a prolific source of infection. The check plants were seriously injured by thrips and their condition was very noticeable to any one passing through the house. The number of thrips per hill had increased from an average of 309 per hill to over )0. As many as 89 thrips were found on some of the larger leaves. I'pon a large plant which has grown to the top of the house thrips can ex- ist. However, the oldest leaves were dry and of no value to the When the i)lant is stopped in its growth and there is no longer a supply of fresh green leaves to keep up the plant's activities owing to the progress of the thrips" at- tack, the plant must soon succumb. From the foregoing experiments it is evident that thrins can be killed by livdrocyanic acid gas at the rate of one ounce per cubic feet. Also that spraying with 40 per cent nicotine prepa- rations, using them at the rate of one teaspoonful to a gallon of water, will con- trol thrips on cucumbers without injury to the plant, provided the spray is im- mediately washed off. If all the plants are treated and the spraying thoroughly and persistently done, even though the application has to be made each day for a time the thrips can be suppressed. Anv insecticide that can accomplish this re- sult when a house is t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
