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Articles

INVESTIGATION OF FLOW PATTERNS IN A GREENHOUSE WITH MECHANICALLY ASSISTED VENTILATION

Article number

893_68

Pages

645 – 652

Language

English

Abstract

In the present work, the effect of fan ventilation in an arc type tunnel greenhouse under the encumbering action of solar radiation is studied.
Results are accrued for the air velocity, temperature, pressure, vapour and fresh air concentrations taking into account the plants drag force and the buoyancy effects caused by higher temperatures prevailing at the upper part of the greenhouse.
The numerical results are compared to experimental data, providing the appropriate base for the validation of the developed numerical model.
Inside the greenhouse there is a tomato crop 1.5 m tall.
For the simulation a 3D grid is created to figure the geometry of a real experiment, and the finite volume method is taken in hand to treat the fully elliptic partial differential equations problem.
Climatic data provided by the Centre of Research and Technology of Thessaly, Greece, were used in order to approach realistic conditions of experiment.
Special items like the thermo-physical and optical properties of covering material or the aerodynamic behaviour of the tomato crop are also considered.
The results show the influence of the forced convection air flow patterns resulted from the mechanical assisted ventilation.
Flow recirculations are presented due to buoyancy effects in areas where forced convection is limited via to the topology showing how the temperature gradients affect the flow.
The conclusions of the comparison will feature a valuable guideline assisting in the improvement of a computational tool for the estimation and prediction for the optimum selection of mechanical installation for fan ventilation in various structural greenhouse specifications.

Publication

International Symposium on High Technology for Greenhouse Systems: GreenSys2009

Authors

D. Fidaros, C. Baxevanou, T. Bartzanas, C. Kittas

Keywords

CFD, forced convection ventilation, greenhouse microclimate, mixed heat transfer, radiation

Full text

https://doi.org/10.17660/ActaHortic.2011.893.68

Online Articles (157)

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17. EVALUATION OF COLOURED NETS IN PEACH PROTECTED CULTIVATION

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18. PRELIMINARY RESULTS OF A PV CLOSED GREENHOUSE SYSTEM FOR HIGH IRRADIATION ZONES IN SOUTH ITALY

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20. EXPERIMENTAL STUDY ON THE GROUND SUPPORT CONDITIONS OF PIPE ENDS IN SINGLE SPAN PIPE GREENHOUSE

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21. PROSPECTS ON LED LIGHTING FOR GROWTH REGULATION AND ENERGY SAVING IN POT PLANT PRODUCTION

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22. EVALUATION OF DIFFERENT SCREENS FOR ENERGY SAVING IN THE GREENHOUSE

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23. CORRELATION BETWEEN AGROCHEMICALS, SOLAR RADIATION AND MECHANICAL PROPERTIES OF GREENHOUSE PLASTIC FILMS

L. Stefani | E. Schettini | G. Vox

24. IMPROVING AIR TRANSFER THROUGH INSECT PROOF SCREENS

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25. MORPHOLOGICAL AND TEXTURAL PLANT FEATURE DETECTION USING MACHINE VISION FOR INTELLIGENT PLANT HEALTH, GROWTH AND QUALITY MONITORING

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27. PERFORMANCE OF MOVABLE-TYPE HARVESTING ROBOT FOR STRAWBERRIES

28. OPERATIONAL PERFORMANCE OF A STATIONARY ROBOTIC STRAWBERRY HARVESTER WITH A PICKING MECHANISM THAT APPROACHES TARGET FRUIT FROM BELOW

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29. CHLOROPHYLL FLUORESCENCE IMAGING FOR HEALTH CONDITION MONITORING OF TOMATO PLANTS IN GREENHOUSE

30. A FRESNEL LENSES BASED CONCENTRATED PV SYSTEM IN A GREENHOUSE

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31. THE SUNERGY GREENHOUSE – ONE YEAR OF MEASUREMENTS IN A NEXT GENERATION GREENHOUSE

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32. FEASIBILITY STUDY OF A COMBI-PV PANEL FOR GREENHOUSE ENERGY SUPPLY AND WATER RECOVERY BY NIGHTLY RADIATION TOWARDS THE SKY

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35. STUDY OF A PASSIVE SOLAR HEATING GREENHOUSE CROP GROW GUTTER

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36. ROOT ZONE HEATING OPTIMIZATION IN ORNAMENTAL PLANT PRODUCTION

M. Fedrizzi | S. Cacini | G. Burchi

37. OPERATING A 250 KW LANDFILL GAS FIRED MICROTURBINE AT A 0.4 HECTARE RESEARCH AND DEMONSTRATION GREENHOUSE

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38. USING HEAT EXCHANGERS TO COOL AND HEAT A CLOSED TOMATO GREENHOUSE: APPLICATION IN THE SOUTH OF FRANCE

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39. DYNAMIC SIMULATION OF MICROALGAE GROWTH AND MICROCLIMATE IN LARGE-SCALE CLOSED PHOTOBIOREACTORS

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40. CONVERSION OF A HIGH-DEMANDING THERMAL-ENERGY LEVEL GREENHOUSE FROM CONVENTIONAL OIL HEATING SYSTEM TO WOOD-BASED RENEWABLE SOURCES HEATING SYSTEM FOR TROPICAL PLANTS PRODUCTION IN MEDITERRANEAN CONDITIONS

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42. THE APPLICATION OF AQUIFER THERMAL ENERGY STORAGE IN THE CANADIAN GREENHOUSE INDUSTRY

B. Wong | L. McClung | A. Snijders | D. McClenahan | J. Thornton

43. INTEGRATIVE ENVIRONMENTAL CONTROL USING HEAT PUMPS FOR REDUCTIONS IN ENERGY CONSUMPTION AND CO₂ GAS EMISSION, HUMIDITY CONTROL AND AIR CIRCULATION

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44. TECHNOLOGY FOR PLANT FOOD SUPPORT IN ANTARCTICA

45. EXPERIMENTAL INVESTIGATION OF THE ENERGY NEEDS FOR A CONVENTIONALLY AND AN INFRARED (IR)-HEATED GREENHOUSE

A. Kavga | T. Panidis | G. Alexopoulos | G. Salahas | V. Bontozoglou

46. A MULTIFUNCTION DEHUMIDIFYING HEAT PUMP FOR GREENHOUSES

G. Chassériaux | O. Gaschet

47. TRANSIENT ANALYSIS OF EARTH-TO-AIR HEAT EXCHANGER FOR A HOME-SCALE GREENHOUSE

D. Bastien | A.K. Athienitis

48. SUBTERRANEAN ROCK-BED FOR GREENHOUSE HEATING AND COOLING

C.E. Sams | T. Hayden | S. Amundson

49. CLIMATIC EVALUATION OF SEMI-CLOSED GREENHOUSES

J.B. Campen | F.L.K. Kempkes

50. TEMPERATURE AND HUMIDITY AS PHYSICAL LIMITING FACTORS FOR CONTROLLED AGRICULTURE

51. EVALUATION OF MICROCLIMATOLOGICAL PARAMETERS INSIDE A SCREENHOUSE USED IN ARID REGIONS

Y.A. Al-Mulla | M. Al-Balushi | M. Al-Rawahy | S. Al-Makhmary | F. Al-Raisy

52. USE OF DISPOSABLE FILM SENSOR FOR ANALYZING UNIFORMITY OF DAILY LIGHT INTEGRAL INSIDE A GREENHOUSE

E. Fitz-Rodríguez | J. Nelkin | C. Kubota

53. DEVELOPMENT OF A BIO-PHYSICAL SIMULATOR FOR MEDITERRANEAN GREENHOUSES

G. Dimokas | N. Katsoulas | C. Kittas | M. Tchamitchian

54. MEASUREMENT OF THE CONDENSATION FLUX IN A VENLO-TYPE GLASSHOUSE WITH A CUCUMBER CROP IN A MEDITERRANEAN AREA

55. MEASUREMENT OF THE SOIL-AIR CONVECTIVE HEAT TRANSFER COEFFICIENT FROM A GREENHOUSE MULCH SOIL

56. AIRFLOW AT THE OPENINGS OF A NATURALLY VENTILATED ALMERÍA-TYPE GREENHOUSE WITH INSECT-PROOF SCREENS

F.D. Molina-Aiz | D.L. Valera | A. López

57. CFD MODELLING AND VALIDATION OF THE AIR TEMPERATURE IN EMPTY GREENHOUSES

R. Suay | R. Granell | A. Marulanda | E. Moltó

58. 3D CFD MODELLING AND VALIDATION OF THE DISTRIBUTED CLIMATE IN A FULL-SCALE MULTI-SPAN PLASTIC HOUSE

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60. MODELLING FRUIT SET IN GREENHOUSE VEGETABLE CROPS

A. Elings | P.H.B. de Visser

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R. Nebbali | J.C. Roy | T. Boulard

62. FLOW PATTERNS DOWNSTREAM SCREENS OF DIFFERENT POROSITIES

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T. Bartzanas | D. Fidaros | N. Katsoulas | C. Kittas | T. Boulard

64. HORIZONTAL FLOW AND VERTICAL TRANSFER IN AND ABOVE AN INFINITE SCREENHOUSE

I. Seginer

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T. Kuroyanagi | M. Iyonaga | K. Sunada | N. Ohnishi | K. Hashimoto

66. EXPERIMENTAL AND NUMERICAL STUDY OF HEAT AND MASS TRANSFER OCCURRING AT PLANT LEVEL INSIDE A GREENHOUSE

A. Kichah | P.-E. Bournet | C. Migeon | G. Chassériaux

67. DEPENDENCE ON STOMATAL RESISTANCE MODEL OF CFD SIMULATION OF CROP EVAPOTRANSPIRATION IN GREENHOUSES

J.C. Roy | T. Boulard | R. Nebbali

68. MODELING AND SIMULATION OF THE GROWTH OF MICROALGAE IN PHOTOBIOREACTORS

69. INVESTIGATION OF FLOW PATTERNS IN A GREENHOUSE WITH MECHANICALLY ASSISTED VENTILATION

D. Fidaros | C. Baxevanou | T. Bartzanas | C. Kittas

70. ANALYSIS OF MECHANICAL VENTILATION IN A THREE-SPAN GREENHOUSE USING COMPUTATIONAL FLUID DYNAMICS (CFD)

71. INVESTIGATION ON AIRFLOW AND TEMPERATURE DISTRIBUTION IN SINGLE-SPAN GREENHOUSES WITH NEW ASYMMETRIC VENT OPENINGS USING CFD

72. CONFIGURATION BY EVALUATING VENTILATION EFFICIENCY BASED ON COMPUTATIONAL FLUID DYNAMICS

F.D. Molina-Aiz | D.L. Valera

73. ANALYSIS OF RADIATION AND TRANSPIRATION HETEROGENEITY INSIDE A GREENHOUSE IMPATIENS CROP USING COMPUTATIONAL FLUID DYNAMICS

P.-E. Bournet | A. Kichah | G. Chassériaux

74. TEMPERATURE AND CO₂ PREDICTION TO CONTROL GREENHOUSE ENVIRONMENT

R. Salazar Moreno | A. Rojano Aguilar | U. Schmidt | C. Huber

75. CO-STATE VARIABLES AS STRATEGIC SET-POINTS FOR ENVIRONMENTAL CONTROL OF GREENHOUSES: TWO STATE-VARIABLES

I. Seginer

76. A FUNCTIONAL-STRUCTURAL PLANT MODEL FOR CUT ROSES – NEW TECHNIQUES FOR MODELLING MANIPULATION OF PLANT STRUCTURE

77. TOMATO STEM AND FRUIT DYNAMICS PREDICTED WITH A WHOLE-PLANT WATER AND CARBON FLOW MODEL

T. De Swaef | K. Steppe

78. TOWARDS A 3D STRUCTURAL TOMATO MODEL FOR CALCULATING LIGHT INTERCEPTION

V. Sarlikioti | L.F.M. Marcelis | P.H.B. de Visser

79. MODELLING OF TOMATO CROP TRANSPIRATION DYNAMICS FOR DESIGNING NEW IRRIGATION CONTROLLERS

J.A. Sánchez | F. Rodríguez | J.L. Guzmán | M. Ruiz Arahal | M.D. Fernández

80. COMPARISON OF DIURNAL VARIATION OF NITRATE AND SUGARS IN LETTUCE AND PREDICTIONS OF A MODEL BASED ON METABOLISM

M.P.N. Gent

81. MODELLING THE GREENHOUSE LETTUCE CROP BY MEANS OF THE COMMUTATION OF TWO INDEPENDENT MODELS – CASE: CONSTANT TRANSMITTIVITY COEFFICIENT

E. Leal-Enríquez | M. Bonilla-Estrada

82. STOCHASTIC DYNAMIC SIMULATION OF FRUIT ABORTION: A CASE STUDY OF SWEET PEPPER

A.M. Wubs | E. Heuvelink | L. Hemerik | L.F.M. Marcelis

83. MODELING YIELD PATTERN OF GREENHOUSE-GROWN SWEET PEPPERS

W.C. Lin | D. Frey | G. Nigh | C. Ying

84. EMPIRICAL MODELS FOR TOMATO CROP USING TEMPERATURE AND PHOTOSYNTHETICALLY ACTIVE RADIATION

A. Ramírez-Arias | J. Pineda-Pineda | F. Rodríguez-Díaz | M. Berenguel-Soria

85. EFFECT OF MUSKMELON LEAF AGE ON PHOTOSYNTHESIS RATE AND OTHER PHYSIOLOGICAL PARAMETERS AT DIFFERENT LIGHT DENSITY

J. Li | Z. Zou | X. Wang

86. THE GREENHOUSE EFFECT IN THE HIGH TROPICS OF COLOMBIA: A MODELING APPROACH

C.R. Bojacá | R. Gil | E. Schrevens

87. SUITABILITY EVALUATION OF FOUR METHODS TO ESTIMATE LEAF WETNESS DURATION IN A GREENHOUSE ROSE CROP

R. Gil | C.R. Bojacá | E. Schrevens

88. COMPARISON OF CLIMATE AND PRODUCTION IN CLOSED, SEMI-CLOSED AND OPEN GREENHOUSES

89. EFFECTS OF TEMPERATURE INTEGRATION WITH LOW PRE-MORNING TEMPERATURES ON MICROCLIMATE, FRUIT YIELD AND ENERGY USE EFFICIENCY IN GREENHOUSE TOMATO PRODUCTION

X. Hao | L. Zhang | MD.S. Borhan | S. Khosla

90. SEASONAL EFFECTS ON PRODUCTION OF RADISH AND LAMB’S LETTUCE GROWN IN A FLOATING SYSTEM

G. Zanin | G. Ponchia | P. Sambo | A.E. Ortega

91. QUANTIFYING PLANT RESPONSES OF A TOMATO CROP UNDER A THERMAL SCREEN

92. GENOTYPIC VARIATION OF CUT CHRYSANTHEMUM RESPONSE TO HIGH CO₂ CONCENTRATION: GROWTH, TIME TO FLOWERING AND VISUAL QUALITY

D. Fanourakis | E. Heuvelink | R. Maaswinkel | S.M.P. Carvalho

93. LIGHT USE EFFICIENCY AT DIFFERENT WAVELENGTHS IN ROSE PLANTS

94. ENERGY-EFFICIENT GREENHOUSE PRODUCTION OF PETUNIA AND TAGETES BY MANIPULATION OF TEMPERATURE AND PHOTOSYNTHETIC DAILY LIGHT INTEGRAL

M.G. Blanchard | E.S. Runkle | J.M. Frantz

95. DETERMINING THE OPTIMAL NIGHTTIME AIR TEMPERATURE FOR PHALAENOPSIS DURING THE VEGETATIVE STAGE

96. HIGH TEMPERATURES AND MARGINALLY INDUCTIVE PHOTOPERIODS IMPACT THE FLORAL DISPLAY OF POINSETTIAS ‘FREEDOM RED’, ‘EARLY RED SPLENDOR’, AND ‘PRESTIGE EARLY RED’

R.A. Schnelle | J.E. Barrett

97. GREENHOUSE ROOF OPENING AND VENTILATION SYSTEMS AFFECT INTERNAL CLIMATE AND LISIANTHUS CROP RESPONSE

G. Fascella

98. LAMB’S LETTUCE GROWING CYCLE AND YIELD AS AFFECTED BY ABIOTIC FACTORS

99. EFFECT OF SHADE ON QUALITY OF GREENHOUSE PEPPERS

J. López-Marín | A. González | A. Gálvez

100. A GIS METHODOLOGICAL PROPOSAL TO EVALUATE SUITABLE AREAS FOR GREENHOUSE INSTALLATION

D. Castronuovo | V. Miccolis | V. Candido | C. Manera

101. USING TEMPERATURE INTEGRATION OVER 24 HOURS IN SOILLESS TOMATO CULTIVATION IN GREENHOUSE: APPLICATION IN THE WEST OF FRANCE

S. Le Quillec | E. Brajeul | D. Lesourd | D. Loda | R. Herraux

102. POSSIBILITIES FOR SOILLESS CULTIVATION IN CUT CHRYSANTHEMUM: EFFECT OF IRRIGATION FREQUENCIES AND SPACING SCHEDULES

D. Fanourakis | E. Heuvelink | W. Verkerke

103. EFFECT OF CANOPY POSITION ON SOME FRUIT QUALITY PARAMETERS OF GREENHOUSE-GROWN NECTARINE

Y. Kong | Y. Yao | C. Ma | B. Li

104. DATA-BASED APPROACH TO MODEL THE DYNAMIC BEHAVIOUR OF GREENHOUSE TEMPERATURE

105. GROWTH AND FLOWERING RESPONSE OF EUPHORBIA × LOMI POYSEAN CULTIVARS UNDER TWO IRRIGATION REGIMES

G. Fascella | P. Maggiore | M. Demma Carà | G.V. Zizzo

106. TRANSPIRATION AND NUTRIENT USE EFFICIENCY OF A SWEET PEPPER CROP UNDER TWO EXTERNAL SHADING SYSTEMS: MOBILE AND FIXED

E. Medrano | F.J. Alonso | P. Lorenzo | M.C. Sánchez-Guerrero

107. ZANTEDESCHIA AETHIOPICA: EFFECTS OF BASAL THERMAL TREATMENTS ON FLOWERING TIME, YIELD AND FLOWER QUALITY

S. Lazzereschi | A. Grassotti | S. Cacini | B. Nesi

108. RICE HULLS AND PEAT REPLACEMENT IN SUBSTRATES FOR VEGETABLE TRANSPLANT PRODUCTION

G. Zanin | A. Bassan | P. Sambo | M.R. Evans

109. PARTICLE SIZES RELATED TO PHYSICAL PROPERTIES OF PEAT-BASED SUBSTRATES

R. Naasz | P. Bussières

110. A FAST PROCEDURE TO ESTIMATE HYDRAULIC CHARACTERISTICS OF GREENHOUSE SUBSTRATES FROM ONE-STEP OUTFLOW DATA

C. Bibbiani | C. Campiotti | L. Incrocci

111. APPLICATIONS OF XEROPHYTOPHYSIOLOGY IN PLANT PRODUCTION – TOMATO FRUIT YIELD AND QUALITY IMPROVED BY RESTRICTED IRRIGATIONS IN SOIL-BASED GREENHOUSES

H.L. Xu | Q.C. Xu | F.F. Qin | C.M. Tian | R. Wang

112. EXTRACTION AND NUTRIENT EFFICIENCY DURING THE VEGETATIVE GROWTH OF TOMATO UNDER HYDROPONICS CONDITIONS

113. ZEOLITES IN MEDIA MIXES FOR SOILLESS PRODUCTION: FIRST RESULTS ON TOMATO

M. Fecondini | M. Mezzetti | F. Orsini | G. Gianquinto | S. Poppi

114. ALTERATION OF NO₃^–, PO₄^3- AND SO₄^2- CONCENTRATION ON ROSE PLANTS IN RESPONSE TO GREENHOUSE CLIMATE PARAMETERS AND THEIR CONCENTRATION IN THE NUTRIENT SOLUTION

C. Lykas | G. Dimokas | C. Kittas

115. THE STRUCTURAL CONTROL OF NUTRIENT SOLUTION FOR STABLE PRODUCTION OF HIGH-QUALITY VEGETABLES IN GREENHOUSES

K. Ishikawa | S. Islam | N. Takeda | T. Yoshimura

116. NITROGEN AND CALCIUM FERTILIZATION EFFECTS ON YIELD OF SILYBUM MARIANUM L. GAERTN. PRODUCED IN HYDROPONIC SYSTEMS

J.L. Horst Warren | C.E. Sams

117. USING TRANSPIRATION CHAMBERS TO DETECT INITIAL TRANSPIRATION IN CUTTINGS AND QUANTIFY TRANSPIRATION IN SEEDLINGS

A. Fulcher | R. Geneve | T. Steele | E. Wilkerson | R.S. Gates

118. CLOSED GREENHOUSE COOLING WITH WATER DROPLET CURTAIN

J. Huttunen

119. THE USE OF SOIL MOISTURE PROBES FOR IMPROVED UNIFORMITY AND IRRIGATION CONTROL IN GREENHOUSES

M.W. van Iersel | S. Dove | S.E. Burnett

120. WIRELESS SENSOR NETWORKS TO PRECISELY MONITOR SUBSTRATE MOISTURE AND ELECTRICAL CONDUCTIVITY DYNAMICS IN A CUT-FLOWER GREENHOUSE OPERATION

J.D. Lea-Cox | F. Arguedas Rodriguez | A.G. Ristvey | D.S. Ross | G. Kantor

121. RAPID WATERING TO ACHIEVE PARTIAL SATURATION OF ROOT MEDIUM ON FLOODED FLOORS

M.P.N. Gent | W. Elmer | R. McAvoy

122. MONITORING OF CLIMATE VARIABLES IN SEMI-CLOSED GREENHOUSES

123. A PHOTOAUTOTROPHIC MICROPROPAGATION SYSTEM USING LARGE VESSELS WITH FORCED VENTILATION FOR COMMERCIAL APPLICATION

Y. Xiao | S. Li | Y. Zhang

124. SUSTAINABLE DISPOSAL OF SURPLUS NUTRIENT SOLUTIONS FROM SOILLESS GREENHOUSES IN NEW ZEALAND

J.R. Lewthwaite | W.T. Bussell | I.S. Cornforth | I.L. Ennis | C.M. Triggs

125. ANALYSIS OF FILTER MATERIALS FOR RECYCLING WASTE NUTRIENT SOLUTIONS IN SOILLESS CULTURE

J.E. Son | Y.K. Jung | T.I. Ahn

126. CHEMICAL CHARACTERIZATION OF SOIL IRRIGATED BY GREYWATER

Y. Al-Zu'bi | Z. Arabeyyat | B. Dababneh | S. Abubaker

127. DEVELOPMENT OF A STATE-OF-THE-ART NUTRIENT DELIVERY SYSTEM TO ACCOMMODATE SMALL TREATMENT SIZES NEEDED FOR NURSERY CROP RESEARCH

128. A SIMULATION MODEL ON LEAF COLOR DYNAMIC CHANGES IN GREENHOUSE MUSKMELON UNDER DIFFERENT CULTIVARS AND ORGANIC FERTILIZER RATES

L. Chang | S. He | M. Chi | D. Huang

129. EXPLORING MORE SUSTAINABLE TECHNOLOGICAL ALTERNATIVES FOR THE GREENHOUSE CUT FLOWERS INDUSTRY IN COLOMBIA

C.A. Parrado | C.R. Bojacá | E. Schrevens

130. THE CLOSED SYSTEM TOOL BOX

B.W. Alsanius | A.K. Gustafsson | K.-J.I. Bergstrand

131. CONSTRUCTED WETLANDS IMPLANTED WITH IRIS VERSICOLOR, JUNCUS SP. AND PHRAGMITES AUSTRALIS AS A POTENTIAL TREATMENT FOR GREENHOUSE EFFLUENTS

V. Gravel | M. Dorais | N. Gruyer | C. Ménard

132. THE USE OF BIODEGRADABLE POTS FOR THE CULTIVATION OF POINSETTIA

V. Candido | D. Castronuovo | V. Miccolis

133. OPTIMIZATION OF IRRIGATION OF ROMAINE LETTUCE (LACTUCA SATIVA L.) CULTIVATED IN MUCK SOIL

134. REUSE OF LEACHED NUTRIENT SOLUTION IN TOMATO SOILLESS CULTURE

B. Benko | J. Borošić | B. Novak | N. Toth | S. Fabek

135. THE INFLUENCE OF ELECTRO KINETIC NUTRIENT TREATMENT SYSTEM USING BAKUHAN-SEKI ON VEGETATIVE GROWTH OF TOMATO

S. Islam | N. Takeda | A. Obashi | K. Ishikawa | D. Yasutake

136. EVALUATION OF ZERO-RUNOFF IRRIGATION SYSTEMS FOR CONTAINERIZED NURSERY PRODUCTION

R. Piatti | G. Amoroso | P. Frangi | A. Fini

137. REMOVAL OF PYTHIUM ULTIMUM PROPAGULES IN RECYCLED GREENHOUSE NUTRIENT SOLUTION USING ARTIFICIAL WETLANDS

N. Gruyer | M. Dorais | V. Gravel | G.J. Zagury

138. THE USE OF ARTIFICIAL WETLANDS TO TREAT GREENHOUSE EFFLUENTS

139. ORGANIC GREENHOUSE VEGETABLE PRODUCTION IN CANADA: CHALLENGES AND OPPORTUNITIES

Y. Zheng | M.A. Dixon | G. Ferguson

140. INTEGRATED SYSTEMS FOR THE PRODUCTION OF ORGANIC GREENHOUSE TOMATOES

141. QUALITY OF ORGANIC AND CONVENTIONAL GREENHOUSE CUCUMBERS AND TOMATOES

D. Wees | K.A. Stewart

142. EVALUATION OF ZEOLITE AS A COMPONENT IN ORGANIC GROWING SUBSTRATES FOR TOMATO TRANSPLANT PRODUCTION

C. Lafrenière | V. Surrage | M.A. Dixon | Y. Zheng

143. CONTROL OF POWDERY MILDEW IN ORGANIC GREENHOUSE MELON CULTIVATION

F.F. Qin | H.L. Xu | Q.C. Xu

144. APPLICATION OF GENERALIZED LINEAR MODEL BASED MULTIPLE COMPARISON PROCEDURES TO GREENHOUSE PEST CONTROL EXPERIMENTS

S. Menke | H.-M. Poehling | D. Gerhard

145. MULTICRITERIA EVALUATION OF THE PATHOLOGICAL RESILIENCE OF SOIL-BASED PROTECTED CROPPING SYSTEMS

M. Tchamitchian | B. Collange | M. Navarrete | G. Peyre

146. EFFICIENCY OF PHYSICAL MEANS OF IPM ON INSECT POPULATION CONTROL IN GREENHOUSE CROPS

A. Vatsanidou | T. Bartzanas | C. Papaioannou | C. Kittas

147. HEALTH MONITORING OF PLANTS BY THEIR EMITTED VOLATILES: A TEMPORARY INCREASE IN THE CONCENTRATION OF METHYL SALICYLATE AFTER PATHOGEN INOCULATION OF TOMATO PLANTS AT GREENHOUSE SCALE

148. DEVELOPMENT OF A WARNING SYSTEM FOR CONTROLLING BOTRYTIS CINEREA IN UNHEATED TOMATO GREENHOUSES

F.J. Baptista | B.J. Bailey | J.F. Meneses

149. S-ABA DELAYS WILTING IN PETUNIA AND IMPATIENS

J.E. Barrett | C.A. Bartuska

150. SUPPRESSION OF GRAY MOLD IN LISIANTHUS BY PASSIVE MEANS OF GREENHOUSE ENVIRONMENT MANAGEMENT

151. APPLICATION OF PLANT GROWTH PROMOTING RHIZOBACTERIA IN A HYDROPONICS SYSTEM FOR ADVANCED LIFE SUPPORT IN SPACE – revised version

O.J. MacIntyre | J.T. Trevors | M Stasiak | M.A. Dixon | K. Cottenie

152. CONTROL OF PYTHIUM SPP. ROOT COLONIZATION IN TOMATO SOILLESS CULTURE THROUGH CHLORINATION OF WATER STORAGE TANK

153. INTERACTION OF CALIBRACHOA AND SELECTED ROOT AND FOLIAR PATHOGENS IN GREENHOUSE SETTINGS

M. Omer | J.C. Locke | J.M. Frantz | L.E. Horst | C.R. Krause

154. INFLUENCE OF THE SULPHUR APPLICATION METHOD ON PESTS, DISEASES AND NATURAL ENEMIES IN A GREENHOUSE PEPPER CROP

155. LEAF AND BUD TEMPERATURES OF SOUTHERN HIGHBUSH BLUEBERRIES (VACCINIUM CORYMBOSUM) INSIDE HIGH TUNNELS

156. EFFECT OF PLASTIC MULCHES ON YIELD AND FRUIT QUALITY OF STRAWBERRY PLANTS GROWN UNDER HIGH TUNNELS

157. HIGH TUNNEL COVERING MATERIALS FOR NORTHERN FIELD PRODUCTION

M.G. Karlsson | J.W. Werner