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Juan Carlos Díaz-Pérez

, 1986 ). Shading also reduces water requirements and increases irrigation water use efficiency in peppers ( Moller and Assouline, 2007 ). This study evaluated the effects of shade level on the bell pepper crop microenvironment, plant growth, leaf gas

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Juan Carlos Díaz-Pérez

. Despite the large body of literature demonstrating the positive impact of the use of plastic film mulch in vegetables, there is still a limited understanding about the way plastic film mulches modify the crop microenvironment resulting in increased fruit

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Fumiomi Takeda and Penelope Perkins-Veazie

between harvest and consumption. Specifically, each of the four speakers in this workshop described practical innovations and technologies for manipulating the high tunnel microenvironment to improve food safety, quality of fruits and vegetables, and plant

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D.S. Lawson, S.K. Brown, J.P. Nyrop and W.H. Reissig

A barrier system for pest control consisting of insect-exclusionary cages covered with three types of mesh material was placed over columnar apple (Malus domestica Borkh.) trees. This system has been shown to provide arthropod control equivalent to insecticides. Light intensity, evaporation, and air and soil temperature were reduced inside the cages. Shoot elongation of columnar apple trees grown inside insect-exclusionary cages was significantly greater than that of trees grown outside the cages. However, this increased shoot growth was not due to etiolation. Tree performance was unaffected by insect-exclusionary cages. Fruit set and fruit soluble solids concentration were not reduced by the cages; however, fruit color intensity was reduced as the degree of shading from the mesh increased. These findings, in conjunction with high levels of arthropod control by insect-exclusionary cages, may allow insect-exclusionary cages to be used for evaluating integrated pest management thresholds, predator-prey relationships, and apple production without insecticides.

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Christopher S. Imler, Camila I. Arzola and Gerardo H. Nunez

hospitable microenvironments for nutrient uptake and growth ( Lei et al., 2015 ; Suzko et al., 2018 ). Plants acidify their rhizosphere by using plasma membrane-bound H + -ATPases ( Santi and Schmidt, 2009 ) and/or by exuding organic acids ( Marschner et al

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Ambani R. Mudau, Puffy Soundy and Fhatuwani N. Mudau

: weight loss, morphological quality (leaf length, petiole length, and leaf width), leaf chlorophyll, microenvironment analysis, total flavonoids, antioxidant activity, and sensory quality (overall acceptance, flavor/taste, and odor). Descriptions on the

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Katrina J.M. Hodgson-Kratky, Olivier M. Stoffyn and David J. Wolyn

domestication to be cultivated as a new crop. Dandelion ( Taraxacum sp.) seeds typically germinate and establish in a humid microenvironment protected from direct sunlight, usually in the thatch layer of lawns and pastures ( Martinkova et al., 2014 ). The

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Natalie R. Bumgarner, Mark A. Bennett, Peter P. Ling, Robert W. Mullen and Matthew D. Kleinhenz

unclear. The outcomes of combined active and passive temperature control techniques on microenvironments and vegetable crops are also uncertain given that combined systems are less often studied than ones involving passive modification alone ( Diaz

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Juan Carlos Díaz-Pérez

( Boyhan et al., 2008 ; Roberts and Anderson, 1994 ; Russo, 1993 ). Shade nets are commonly used to modify the crop microenvironment with the goal of improving crop production ( Castellano et al., 2008 ). Few reports, however, have focused on determining

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Richard J. McAvoy

Root-zone and plant canopy temperatures were continuously monitored as a poinsettia (Euphorbia pulcherrima Willd. ex JSI.) crop was grown in the greenhouse under warm day/cool night [(+) DT-NT] or cool day/warm night [(-) DT-NT] temperature regimes. Day temperatures were imposed from 0900 to 1700 hr. Light levels photosynthetic photon flux (PPF) and outside ambient air temperatures were also monitored. Temperature differences between the root-zone and plant canopy microenvironments were most extreme during the night-to-day and day-to-night temperature transition periods. The temperature difference between the plant canopy and the root zone following temperature transition periods had been previously identified as a critical factor affecting stem elongation. Overall poinsettia height was consistently shorter under the (-) DT-NT than under the (+) DT-NT environment.