. The American florist : a weekly journal for the trade. Floriculture; Florists. 406 The American Florist. Oct. iS, palms and other stove house plants. The plants exposed were arecas, Kentia Forsteriana, nephrolepises and agaves. The plants were infested with scale of various kinds, the agaves being in especi- ally bad shape. The insects were all killed, and the agaves were also badly burned. The leaves showed no sign of injury for several days, but later turned yellowish-white in color and fell away. The other plants were not injured. LIGHT EXPOSURE FOR LONG TIME. The Henemway "dilute me
. The American florist : a weekly journal for the trade. Floriculture; Florists. 406 The American Florist. Oct. iS, palms and other stove house plants. The plants exposed were arecas, Kentia Forsteriana, nephrolepises and agaves. The plants were infested with scale of various kinds, the agaves being in especi- ally bad shape. The insects were all killed, and the agaves were also badly burned. The leaves showed no sign of injury for several days, but later turned yellowish-white in color and fell away. The other plants were not injured. LIGHT EXPOSURE FOR LONG TIME. The Henemway "dilute method" of fumigation was tried on a number of plants, but was not satisfactory. The plants showed more tendency to injury than when treated with the common method, and the insects were not much affected. The gas was used at the rate of grammes per cubic foot and the tem- perature varied from 55° to 50°. The plants subjected to treatment were colcuses, acalyphas, oleanders and cyper- uses. Several trials were made with this method but it was rejected as unsatisfac- tory. Chrysanthemums, which were found to be especially susceptible to injury, were exposed to grammes for twenty minutes, and to grammes for fifteen minutes. These plants were badly infested with black aphis. The aphis were all killed by the treatment but the j'oung growth of the plants was also burned. Only a few of the upper leaves of the plants were affected, and theinjury was less than for the aphis. The sprouts from old plants, which had been growing under the edge of the greenhouse bench, were more severely injured than were rooted cuttings from the Ijench. The sprouts were softer, and had larger pores than the cuttings, and hence were more subject to injury. SUMMARY. The statement made by Messrs. Woods and Dorsett that 'Plants were less injured by a shortexposuretoarelatively large amount of gas than they were by a long exposure to a relatively small amount, and that, on the other hand, a s
Size: 1365px × 1831px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
