The effect of plant grpwth retardant, methyl-2,7-dichloro-9-hydroxyfluorene-9-carboxylate (morphactin), was investigated on Chrysanthemum morifolium cv. Golden Yellow Princess Anne. Treatments with 10 and 20 ppm were the most effective. Pot chrysanthemums grown and pinched following accepted commercial practices were sprayed with the material. The morphactin induced more branches to develop, especially when low light intensity prevailed in mid-winter. Flower count on treated plants, grown 3 to a 6-inch azalea pot, were comparable to untreated plants grown 5 to a 6-inch pot. The branch inducing property was found to be consistent, both during the winter and summer months.
A detailed study of the distribution of diffusible and extractable auxin following morphactin spray of 20 and 100 ppm, showed that the polarity of the auxin following treatments was reduced. Extractable auxin did not seem to be affected by the treatment, when the wheat straight growth test bioassay was employed. In addition, the material caused a delay in flowering, reduced leaf size, thickened stems, and reduced cell division.
The impetus to compile a guide to terminology for the Easter lily was provided by a series of joint meetings between lily researchers and various industry representatives. During the course of these meetings, it became obvious that some terms did not relate the same phenomenon to all individuals. As a result, it was decided that an effort should be made to compile a list of terms directly related to Easter lily production and research. The glossary which follows is a result of those efforts. Hopefully, the guide will aid students, researchers, and industry representatives.
Aldicarb 10G [2-methyl-2-(methylthio) propionaldehyde 0 (methyl-carbamoyl) oxime] was applied to 4, 8, and 12-week old potted chrysanthemums (Chrysanthemum morifolium Ramat) by applying granules directly to the soil, and by broadcasting granules over wet and dry foliage. Residues in upper and lower foliage, buds and flowers were measured at intervals following treatment. The results showed that residues in mature plants may not reach levels toxic to certain insect and mite pests regardless of application method; residues in upper leaves were highest, regardless of application method; and application to wet foliage resulted in highest residues initially, but which dissipated rapidly.
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