Volunteers Soil Texture And Moisture Availability Impacts on The Efficacy of Soil-applied Paclobutrazol By John W. Groninger and John R. Seiler Abstract. Uptake and efficacy of soil applied chemicals is often influenced by soil texture and moisture status at the time of application. Sweetgum shoot elongation was responsive to paclobutrazol in the clay loam, but not the sandy clay loam soil. Sweetgum total leaf area and specific leaf area and white pine needle length were reduced by paclobutrazol treatments across water availabilities and soil textures. The results of this study suggest that drought during and following application of paclobutrazol does not reduce efficacy of this chemical.
Further research is needed to clarify the impact of soil texture on paclobutrazol efficacy.
By Jeffery K. Iles and Joanna S. Stookey Abstract. Slightly less than two-thirds of all respondents indicated they had eliminated certain crabapple selections from their product line. The cultivars 'Radiant' and 'Royalty' were cited most frequently as discontinued taxa, primarily because of disease problems. Businesses must continually evaluate the appropriateness of the crabapple taxa they carry to insure they are offering only those selections with excellent ornamental utility and superior disease resistance. Jr. Abstract .