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A.P. Papadopoulos, U. Saha, X. Hao, and S. Khosla

Encouraging results from previous trials on field vegetables led to the expectation that a kinetin foliar spray from the commercial product KIN-Gro (5000 ppm kinetin) on greenhouse vegetables would positively affect their growth and productivity. Thus, in this study, we evaluated the usefulness of this product on rockwool-grown `Bodega' cucumber (Cucumis sativus), `Rapsodie' tomato (Lycopersicum esculentum), and `4-Ever' and `444' pepper (Capsicum annuum) at the Greenhouse and Processing Crops Research Centre of Agriculture and Agri-Food Canada, Harrow, Ont. Two replicated experiments were conducted to study the effect of kinetin spray on growth and production of all three crops: the first in Spring-Summer 2004 and the second in Fall-Winter 2004. Foliar sprays of kinetin at 2.5, 5, and 10 ppm concentrations were tested against a water spray (control) on each crop. A 2.5-ppm kinetin spray had beneficial effects on the growth of cucumber transplants (taller plants and greater leaf area and fresh weight of leaves and stems). Furthermore, this treatment resulted in higher marketable yield in the Spring-Summer crop and in larger fruit size in the Fall-Winter crop. Regression analysis showed that cucumber marketable yield had an overall quadratic response to kinetin spray concentration in Spring-Summer season maximizing at 5.1 ppm kinetin. Kinetin spray also had beneficial effects on the growth of tomato seedlings, but not on yield. On the other hand, significant beneficial effects were observed on the growth of pepper seedlings and on marketable yield and fruit quality. Regression analysis showed that the response of pepper marketable yield to kinetin spray concentration was positive and linear. It must be noted that, given the rather short-term nature of our experiments, the observed beneficial effects of the kinetin sprays on yield can only be interpreted as beneficial effects on early yield rather than on the total yield. We concluded that under our growing conditions, cucumber production would benefit from a dilute (2.5 ppm) kinetin spray, and pepper production from a high concentration spray (10 ppm); tomato transplant growth will also benefit from a kinetin spray at 2.5 ppm. The results of this study could be of considerable significance to the greenhouse vegetable industry.

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Christopher J. Currey, Nicholas J. Flax, and Kellie J. Walters

randomized and placed back into flats. Plant height from the substrate surface to the top of the plant was measured on the date the first flower opened. Time to flower from planting was calculated. The experiment was conducted in a completely randomized

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Songul Sever Mutlu and Ece Agan

, 1980 ; Nau, 1989 ; Vasudevan et al., 2008 ). Effects of pinching in terms of significant reduction in plant height, delayed flowering, and increased number of flowering stems have been reported in many commercial flower crops ( Debra and Lewis, 1986

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Silvia R. Marino, Jeffrey G. Williamson, James W. Olmstead, and Philip F. Harmon

harvest season (before destructive sampling on June 2011), only removing the old flower spikes while the new vegetative flush was allowed to grow. Vegetative field measurements. In 2010 and 2011, from July to November, average plant height and width in

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Amir Rezazadeh, Richard L. Harkess, and Guihong Bi

influence of PBZ on increased drought tolerance was due to a reduction in transpiration, shorter plant height, diminished biomass and leaf area, and an increase in stomatal resistance ( Fernández et al., 2006 ). Flurprimidol is a triazole similar to PBZ and

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Joseph Tychonievich and Ryan M. Warner

representative F 1 individual, parent species, and F 1 plants. Total plant height, flower length, number of branches in the inflorescence, time to flower, leaf length, and number of leaves produced before flowering were measured at the time of first flowering

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Waltram Ravelombola, Jun Qin, Yuejin Weng, Beiquan Mou, and Ainong Shi

counted. Plant height (from the bottom part to growing point) for both non-stressed and salt-stressed plants was measured on per plant basis. RST for plant height, described as the ratio between plant height under stress and non-stress conditions, was

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Le Luo, Yichi Zhang, Yingnan Wang, Tangren Cheng, Huitang Pan, Jia Wang, and Qixiang Zhang

study, RCCD was used to analyze the interactions among W and N, P, and K fertilizer rate on growth parameters of gesnariad. The objectives of this study were 1) to quantify interactions among W, N, P, and K on plant height, crown diameter, number of

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Christopher B. Cerveny, William B. Miller, Thomas Björkman, and Neil S. Mattson

-samples (pooled) per treatment. Plants were evaluated after 4 weeks in the greenhouse for percent survival (any visible growth), plant height (substrate line to tallest leaf), and shoot dry weight (severed at soil level and dried 3 d at 70 °C). Greenhouse Expt. 2

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Natalie Yoder and Jessica G. Davis

( Bacillus thuringiensis ) were made to control cabbage worms ( Pieris rapae ). Measurements. Weekly data were collected on plant height. There were four harvests during the growing season in 2013 and three harvests during the 2014 growing season ( Table 4