Effect of Soilless Potting Media and Water Management on Development of Fungus Gnats (Diptera: Sciaridae) and Plant Growth

Olson, Denise L.; Oetting, Ronald D.; Iersel, Marc W. van

doi:10.21273/hortsci.37.6.919

Cited by 26 publications

(23 citation statements)

References 19 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the interplay of other factors such as differences in root development, xylem conductance, osmotic adjustment, and stomatal and nonstomatal conductance to CO 2 among species also could have contributed to the lack of differences in A at q levels of 0.15, 0.22, and 0.32 m 3 Ám -3 . Our results are in line with reports available from diverse groups of plants that indicate a threshold level of q for A to decrease and above which no or small differences in A are usually seen (Gindaba et al, 2005;McCree, 1986;Olson et al, 2002;Xu and Zhou, 2005).…”

Section: Resultssupporting

confidence: 93%

Physiological Responses to Different Substrate Water Contents: Screening for High Water-use Efficiency in Bedding Plants

Nemali¹,

Iersel²

2008

J. Amer. Soc. Hort. Sci.

View full text Add to dashboard Cite

Efficient use of irrigation water is increasingly important in the production of bedding plants. Two approaches to efficient water use include reducing irrigation water wastage during production by growing plants at the optimal substrate water content (θ) and growing species with high water-use efficiency (WUE). However, there is little information on the effects of different θ levels on leaf physiology of bedding plants and variation in WUE among different species of bedding plants. The objectives of this study were to determine the effects of θ on leaf water relations, gas exchange, chlorophyll fluorescence, and WUE of bedding plants and to identify the physiological basis for differences in WUE between two bedding plant species. We grew salvia ‘Bonfire Red’ (Salvia splendens Sellow ex Roemer & J.A. Schultes), vinca ‘Cooler Peppermint’ [Catharanthus roseus (L.) G. Don.], petunia ‘Lavender White’ (Petunia × hybrida Hort ex. Vilm.), and impatiens ‘Cherry’ (Impatiens walleriana Hook F.) at four constant levels of θ (0.09, 0.15, 0.22, and 0.32 m3·m−3) using an automated irrigation controller. Regardless of species, leaf water potential (Ψw) and leaf photosynthesis (A) of all four species were lower at a θ of 0.09 m3·m−3 and were not different among the other θ levels, but stomatal conductance to H2O (g S) was lower at 0.09 than at 0.15 and 0.22 m3·m−3 and highest at 0.32 m3·m−3. WUE of bedding plants at different θ levels depended on species. The WUE of petunia was unaffected by θ, whereas for the other three species, WUE was higher at a θ of 0.09 m3·m−3 than at 0.32 m3·m−3. Differences in WUE between petunia and salvia were partly from differences in photosynthetic capacity between the two species. Based on the response of A to leaf internal CO2 concentration (Ci), mesophyll conductance to CO2 [gm (a measure of photosynthetic capacity)] was higher in petunia than salvia, whereas gas phase conductance to CO2 (gCO2 ) was similar for these two species, which resulted in higher WUE in petunia than salvia.

show abstract

Section: Resultssupporting

confidence: 93%

Physiological Responses to Different Substrate Water Contents: Screening for High Water-use Efficiency in Bedding Plants

Nemali¹,

Iersel²

2008

J. Amer. Soc. Hort. Sci.

View full text Add to dashboard Cite

show abstract

“…coprophila Lintner (Diptera: Sciaridae) adults tended to lay eggs more often in Metro-Mix 560 (The Scott' s Company; Marysville, OH, US) than either Sunshine LC1 Mix (Sungro Horticulture, Inc.; Bellevue, WA, US) or SB300 Universal Professional Growing Mix (Strong-Lite Horticulture Products; Pine Bluff, AK, US) growing media. Fungus gnat adults also appear to be more attracted to or prefer moist growing media containing peat moss (Baker, 1994) since moist growing medium may provide a higher level of fungal activity (Baker, 1994, Olson et al, 2002, which is attractive to and serves as a food source for fungus Effect of growing media and their constituents on fungus gnat, Bradysia sp. nr.…”

Section: Introductionmentioning

confidence: 99%

Effect of growing media and their constituents on fungus gnat, Bradysia sp. nr. coprophila (Lintner) adults

et al. 2007

View full text Add to dashboard Cite

This study was conducted to determine the attractiveness of two growing media, commonly utilized in greenhouses, to fungus gnat, Bradysia sp. nr. coprophila adults. The constituents of the most attractive growing medium tested were determined by gas chromatography analysis using a steam-distillation procedure. We found that fungus gnat adults were more attracted to the growing medium, SB300 Universal Professional Growing Mix, which contains composted bark, than to another growing medium (Sunshine LC1 Mix) and their components when tested in a series of laboratory experiments using multiple-choice experimental arenas. A higher percentage of fungus gnat adults were attracted to moist SB300 (92%) than SB300 growing medium that had been oven dried (8%). In addition, fungus gnat adults preferred SB300 although they had been reared on Sunshine LC1 Mix. When comparing the SB300 fresh from the bag to growing medium that had been pasteurized and moistened with water, gas chromatographic-mass spectroscopic data showed there were declines in several terpenoid constituents as well as an increase in fatty acids and cyclosulfur. The results of this study indicate that B. sp. nr. coprophila adults prefer certain growing media, which may assist greenhouse producers in managing fungus gnats in crop production systems.

show abstract

“…5, fungus gnat adults remained in the central compartment, further validating evidence for repellent activity of the dryer sheets when placed in both sample compartments. Fungus gnat adults are highly attracted to moist growing medium (Baker 1994;Cloyd et al, 2007b;Olson et al, 2002); however, dryer sheet repellency, as demonstrated in Expts. 3 and 5, clearly overcame any attraction to the moist growing medium.…”

Section: Discussionmentioning

confidence: 99%

Bounce® Fabric Softener Dryer Sheets Repel Fungus Gnat, Bradysia sp. nr. coprophila (Diptera: Sciaridae), Adults

Cloyd¹,

Marley²,

Larson³

et al. 2010

horts

View full text Add to dashboard Cite

This study was conducted to assess the repellency of Bounce® original brand fabric softener dryer sheets against fungus gnat, Bradysia sp. nr. coprophila (Diptera: Sciaridae), adults. For all five experiments conducted under laboratory conditions, fungus gnat adults collected in the sample compartments that included Bounce® original brand fabric softener dryer sheets ranged between 12% and 18% compared with the mean proportion of fungus gnat adults recovered from sample compartments that excluded dryer sheets, ranging in mean proportion from 33% to 48%. Chemical analysis using a steam distillation procedure to isolate volatile constituents found linalool as one of the major volatiles detected in the Bounce® original brand fabric softener dryer sheets. Additional constituents isolated were benzyl acetate, beta-citronellol, and hedione. Based on the results from our study, under laboratory conditions, Bounce® fabric softener dryer sheets do in fact repel B. sp. nr. coprophila adults.

show abstract

Effect of Soilless Potting Media and Water Management on Development of Fungus Gnats (Diptera: Sciaridae) and Plant Growth

Cited by 26 publications

References 19 publications

Physiological Responses to Different Substrate Water Contents: Screening for High Water-use Efficiency in Bedding Plants

Physiological Responses to Different Substrate Water Contents: Screening for High Water-use Efficiency in Bedding Plants

Effect of growing media and their constituents on fungus gnat, Bradysia sp. nr. coprophila (Lintner) adults

Bounce® Fabric Softener Dryer Sheets Repel Fungus Gnat, Bradysia sp. nr. coprophila (Diptera: Sciaridae), Adults

Contact Info

Product

Resources

About