Use of Air Circulation to Reduce Wet Leaves under High Humidity Conditions

Kuroyanagi, Takeshi; Yoshikoshi, Hisashi; Kinoshita, Takafumi; Kawashima, Hiroki

doi:10.2525/ecb.51.215

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…The aggression by fungi and virus can be related to the humidity and temperature conditions of the room. Kuroyanagi et al (2013) mentioned that high humidity and closed air circulation are a proper condition for fungi and virus to grow. The presence of fungi and virus are harmful to the eggs, larvae, and pupae development since they will be blackened and rotted because of fungi and virus.…”

Section: Discussionmentioning

confidence: 99%

Graphium Androcles Boisduval (Lepidoptera: Papilionidae): Evaluation of Biological Aspect of the Pre-Adult Stadia at Bantimurung, South Sulawesi, Indonesia

Harlina

Basukriadi²,

Achmad

et al. 2017

Appl Ecol Env Res

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Abstract. G. androcles is one of the endangered butterflies categorized as endemic species in Sulawesi region. This study aimed to determine the biological aspect of the pre-adult stadia of G. androcles through breeding efforts at the laboratory. The study was conducted from July until November 2014. The butterfly eggs were collected from the tourist area, Pattunuang, and were then reared in the laboratory. The larval rearing technique was using covered method placed in captivity. The time needed from eggs to develop to adults varies, ranging from 46-65 days. The time needed for eggs to develop to the larval stage ranges from 5-9 days. Larval stage consists of five instars, and development time is 23-30 days. Each of prepupal and pupal stages needed 2-3 days and 20-25 days, respectively. The percentage of survival rate for egg, larva, prepupa, and pupa to imago stages were 42%, 90%, 100%, and 70%, respectively. The eggs which failed to hatch were 38%, where 12% eggs were harmed by Camponotus sp, and 8% eggs were moldy. Aleoides indiscretus was a parasite that harmed the L4 instar. G. androcles activities in the laboratory and in captivity were behavioral responses as a way to adapt to the environmental conditions.

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Section: Discussionmentioning

confidence: 99%

Graphium Androcles Boisduval (Lepidoptera: Papilionidae): Evaluation of Biological Aspect of the Pre-Adult Stadia at Bantimurung, South Sulawesi, Indonesia

Harlina

Basukriadi²,

Achmad

et al. 2017

Appl Ecol Env Res

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“…The effect of air circulation on wetting and transpiration of tomato leaves was investigated using the chamber test (Kuroyanagi et al 2013). Non-grafted tomato plants (S. lycopersicum, cv.…”

Section: Reduce Wetness On Cropsmentioning

confidence: 99%

“…The wetting of crops results from three factors associated with the high humidity of greenhouses: (1) condensation falling from greenhouse covers, (2) condensation on the leaf or fruit surface, and (3) guttation, which is the exudation of drops of xylem sap resulting from root pressure (Kuroyanagi et al 2013). Sekine et al (2007) focused on estimating the appearance of wetting resulting from (1) and (2), whereas Kuroyanagi et al (2013) revealed the effective range of wind speed for suppressing the wetting on leaves resulting from (3).…”

Section: Reduce Wetness On Cropsmentioning

confidence: 99%

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Current Usage of Air Circulators in Greenhouses in Japan

Kuroyanagi

2016

JARQ

Self Cite

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In the last decade, air circulators have been widely used in greenhouses and high tunnels in Japan. The main purpose of air circulation is to provide uniformity in temperature, humidity level, and carbon dioxide concentration in greenhouse air. In addition, empirical knowledge that air circulation prevents hygrophilous diseases increased among growers, together with the inference that air circulation reduces the fuel consumption required for heating. Although the benefits of air circulation remain uncertain, some empirical evidence has been obtained from horticultural and engineering studies in Japan. In this review, the results of these investigations are summarized on the basis of five aspects: performance indicators for circulators, microclimate uniformity, crop yield, suppression of hygrophilous diseases and possible mechanisms. Practical issues regarding the installation of air circulators for greenhouses and high tunnels are also discussed.

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“…In a study on the influence of air disturbance on the variation of canopy temperature in a double-span greenhouse, Ishii et al (2012) found that the SD of canopy temperature under air disturbance with air velocity of 0.5 m/s was less than 0.6°C, and the SD of canopy temperature without air disturbance was more than 1.1°C. Stagnant air will form a boundary layer on the surface of plants, and as a result, the physiological processes of crops are suppressed (Kuroyanagi, 2013;Kuroyanagi et al, 2013;Takayama et al, 2014). Appropriate air disturbance can regulate the microenvironment of plant canopy leaves, promote energy exchange between the crop canopy and the surrounding environment, reduce CO 2 exchange resistance, increase CO 2 concentration in the microenvironment of leaves, and improve the transpiration rate and promote photosynthesis (Elings et al, 2007).…”

mentioning

confidence: 99%

Design of an Air Blowing Device Above Seedbed: The Effect of Air Disturbance on the Microenvironment and Growth of Tomato Seedlings

Li¹,

Li²,

Wu³

et al. 2020

horts

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In recent years, air circulation has been used in protected cultivation to improve the microenvironment around seedlings, which in turn enhances photosynthesis and seedling growth. However, a practical and precise air circulation device has not yet been reported, especially one for growing seedlings in a greenhouse. Considering the use of a seedbed in seedling cultivation, a blower that can move back and forth on the seedbed and accurately control the air velocity is designed. In this experiment, we take the nonblowing treatment as the control (CK); three air velocities (0.3, 0.6, and 0.9 m/s) were selected to investigate the effect of interval blowing on the microenvironment of the canopy, physiology of seedling growth, stomatal characteristics of leaves, and stem mechanics of tomato seedlings. The three air velocities were found to significantly reduce the canopy temperature by 0.44, 0.78, and 1.48 °C lower than the CK, respectively, and leaf temperature by 0.83, 1.57, and 2.27 °C lower than the CK, respectively, in cultivated seedlings during summer. The relative humidity of the tomato seedling canopy decreased by 2.7% to 7.0%. Compared with the CK, the plant height of tomato seedlings decreased by 13.54% and root dry mass, root-shoot ratio, and seedling quality index (SQI) increased by 34.63%, 21.43%, and 14.29%, respectively, at 0.6 m/s. In addition, mechanical indexes such as hardness and elasticity of the tomato seedling stem were higher under air disturbance than those of the CK. The best effect was seen in the treatment with the air velocity of 0.6 m/s, in which the hardness and elasticity of the stem base and the first node were significantly higher than that of the CK. In conclusion, air disturbance generated by the air blowing device we designed effectively improved the microenvironment around the plants, enhanced the physiological activity of the seedlings, and thereby promoted seedling growth.

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Use of Air Circulation to Reduce Wet Leaves under High Humidity Conditions

Cited by 3 publications

References 13 publications

Graphium Androcles Boisduval (Lepidoptera: Papilionidae): Evaluation of Biological Aspect of the Pre-Adult Stadia at Bantimurung, South Sulawesi, Indonesia

Graphium Androcles Boisduval (Lepidoptera: Papilionidae): Evaluation of Biological Aspect of the Pre-Adult Stadia at Bantimurung, South Sulawesi, Indonesia

Current Usage of Air Circulators in Greenhouses in Japan

Design of an Air Blowing Device Above Seedbed: The Effect of Air Disturbance on the Microenvironment and Growth of Tomato Seedlings

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