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T.E. Baumann, G.W. Eaton, and D. Spaner

Eight day-neutral and seven short-day strawberry (Fragaria ×ananassa, Duch.) varieties were evaluated on raised beds during 1990 and 1991 in the Fraser River valley, B.C. Among day-neutral varieties in 1990, total variation in marketable yield originated in fruit count (26%), total yield (18%), average leaf size (22%), and runner count (19%) per plant. In 1991, total variation in marketable yield originated in fruit count (38%), runner count (23%), crown count (13%), and total yield (16%) per plant. `Selva' was one of the most productive day-neutral varieties and had the heaviest fruit and the fewest culls during both years of the study. The short-day varieties had uniformly low yields of marketable fruit during the establishment year, 1990. Variation in marketable yield in 1991 originated in runner count (34%), total yield (18%), and fruit count (16%) per plant. Of the short-day varieties in 1991, `Shuswap' had the highest marketable yield and, along with `Pajaro' and `Sequoia', had the fewest culls. `Shuswap' was a prolific producer of runners, while `Sumas' and `Redcrest' yielded well without prolific runner production.

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M.M. Gaye, G.W. Eaton, and P.A. Joliffe

The effects of rowcovers and plant architecture on fruit development and spatial distribution were assessed in a study of field-grown bell peppers (Capsicum annuum L. cv. Ace Hybrid). A forced regression procedure indicated that rowcovers advanced anthesis and delayed harvest dates on the lower nodes and increased the duration of maturation (over all branches and nodes). Rowcovers did not influence total fruit yield. Fruit were obtained from as many as nine node locations, but the largest portion of the total yield was obtained from the first five nodes. Fruit frequency declined with later nodes and lateral branches, compared with the main branch. Fruit produced after lateral branch four on uncovered plants were below an acceptable market size. Marketable fruit were obtained from all nodes, with the exception of node six of covered plants.

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C.M. Roberts, G.W. Eaton, and F.M. Seywerd

Paclobutrazol treatments of 0, 0.125, 0.250, and 0.500 mg/plant improved the form of Tibouchina urvilleana (DC.) standards and eliminated the need for pruning during the display season. Paclobutrazol did not improve the form of Fuchsia × hybrida Hort. ex Vllm. Paclobutrazol inhibited trunk caliper development in both species. Paclobutrazol at 0.125 mg/plant slightly increased Tibouchina flower size. Chlormequat at 0, 1000, or 2000 mg/plant did not hasten flowering of Tibouchina. Chemical names used: ß-[(4-chlorophenyl) methyl]-α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol (paclobutrazol); α-chloro-N,N,N-trimethylethanammonium chloride (chlormequat).