Effects of Insecticides on Gas Exchange, Vegetative and Floral Development, and Overall Quality of Gerbera

Spiers, James D.; Davies, Fred T.; He, Chongbo; Bográn, Carlos E.; Heinz, Kevin M.; Starman, Terri W.; Chau, Amanda

doi:10.21273/hortsci.41.3.701

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…Unfortunately, Gerbera sp. make excellent host for different insect pests to the extent of being used as a trap plant for different pests especially western flower thrips, Frankliniella occidentalis which is its main pest with spider mites (Blumthal et al, 2005;Spiers et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology

Ismail

Elzohery

Ghallab

2016

Egyptian Academic Journal of Biological Sciences. A, Entomology

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The objective of this research was to study the abundance and prevalence of Brevipalpus phoenicis and its predators on Gerbera jamesonii Bolus and its relation with different weather variables during a one-year study 2015 at Ismailia Governorate, Egypt. The abundance of B. phoenicis life stages was monitored monthly. The effects of mite's infestation on G. jamesonii morphology represented in leaf, flower, bud and flower deformity numbers during spring was considered, in addition to the photosynthetic pigments. Our results revealed great variations in mite population throughout the year. The highest density of B. phoenicis adults, eggs, larvae, nymphs were recorded in January (50.25±6.08), May (71.85±8.57), January (31.40±4.71), July (74.43±8.73), respectively while the minimum density were recorded in October (4.10±0.83), September (10.30±2.09), August (1.95±0.46) and (16.10±2.50), respectively. Three predacious mites: Amblyseius cucumeris, Hemicheyletia wellsina, Tydeus sp. and one predacious insect Scolothrips longicornis were recorded. Negative correlations was recorded between B. phoenicis eggs or larvae with S. longicornis (-0.122,-0.168), respectively. Significant negative correlations were observed between different B. phoenicis life stages, Tydeus sp. and S. longicornis with temperature and relative humidity. There were significant negative or positive correlations between life stages of B. phoenicis and the morphological characteristics of the plant. Highly significant negative correlation was recorded between mite infestation and photosynthetic pigments. In conclusion, G. jamesonii is recorded as a new host for B. phoenicis with a marked deformation in the plant morphology. In addition environmental factors had a great effect on its abundance.

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Section: Resultsmentioning

confidence: 99%

Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology

Ismail

Elzohery

Ghallab

2016

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…(Gough, 1990)]. However, Knabke and Hancock (1990) did not find phytotoxic effects of Talstar Ò 10WP in over 100 different species grown in the field and greenhouse, nor did Spiers et al (2006) in 'Festival Salmon' gerbera (Gerbera jamesonii).…”

Section: Discussionmentioning

confidence: 96%

Effects of Bifenthrin on Mycorrhizal Colonization and Growth of Corn

Corkidi¹,

Bohn²,

Evans³

2009

hortte

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The insecticide bifenthrin is a synthetic pyrethroid required by regulation for the production of nursery crops to suppress the red imported fire ant (Solenopsis invicta) in Orange and Riverside counties in California. We conducted a greenhouse experiment to analyze the effects of different rates of bifenthrin on the growth and mycorrhizal colonization of ‘Silver Queen’ corn (Zea mays) inoculated with VAM 80®, a mycorrhizal inoculum with spores, hyphae, and root pieces colonized by Glomus spp., used to inoculate California native plants in containers. Corn was used because it is the standard indicator plant used for mycorrhizal inoculum potential assays and it is a good host for arbuscular mycorrhizal fungi propagation. The application of bifenthrin had no detrimental effects on mycorrhizal colonization of corn. There were no significant differences in the root length colonized by arbuscules, vesicles, or in the total percentage of mycorrhizal colonization obtained in the plants grown with the different bifenthrin rates 6 weeks after transplanting. However, there were significant interactions on the effects of bifenthrin and mycorrhizal colonization on plant growth. The addition of 12, 15, and 25 ppm of bifenthrin reduced corn biomass of nonmycorrhizal plants, but had no effect on the growth of mycorrhizal plants. There were no significant differences between the mycorrhizal and nonmycorrhizal plants grown with 0, 10, and 12 ppm of bifenthrin. In contrast, inoculation with VAM 80® increased the shoot dry weight of plants grown with 15 and 25 ppm of bifenthrin. This study showed that mycorrhizal colonization can be helpful to overcome some of the negative effects of bifenthrin on the growth of corn.

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“…Testing plant photosynthetic function in this way is widely used for estimation of effects of herbicides, non-herbicidal pesticides, insecticides, and some allelochemicals (Krugh and Miles 1996; Reigosa et al 2001; Spiers et al 2006; Bigota et al 2007). …”

Section: Discussionmentioning

confidence: 99%

Ecologically Acceptable usage of Derivatives of Essential Oil of Sweet Basil,Ocimum basilicum,as Antifeedants Against Larvae of the Gypsy Moth,Lymantria dispar

Popović

Kostić

Stanković³

et al. 2013

Journal of Insect Science

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Ethanol solutions of five fractions obtained from essential oil of sweet basil Ocimum basilicum L. (Lamiales: Lamiaceae) (F1–F5) were tested for their antifeedant properties against 2nd instar gypsy moth larvae, Lymantria dispar L. (Lepidoptera: Lymantriidae), in laboratory non-choice and feeding-choice experiments. Prior to bioassays, the chemical composition of each fraction was determined by gas chromatography analyses. Significant larval deterrence from feeding was achieved by application of tested solutions to fresh leaves of the host plant. The most effective were were F1 (0.5%), F4 (0.05, 0.1, and 0.5%), and F5 (0.1 and 0.5%), which provided an antifeedant index > 80% after five days. A low rate of larval mortality was observed in no-choice bioassay. In situ screening of chlorophyll fluorescence as an indicator of plant stress level (assessed by the induced fluorometry) confirmed that the tested compounds did not cause alternations in the photosynthetic efficiency of treated leaves.

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Effects of Insecticides on Gas Exchange, Vegetative and Floral Development, and Overall Quality of Gerbera

Cited by 8 publications

References 19 publications

Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology

Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology

Effects of Bifenthrin on Mycorrhizal Colonization and Growth of Corn

Ecologically Acceptable usage of Derivatives of Essential Oil of Sweet Basil,Ocimum basilicum,as Antifeedants Against Larvae of the Gypsy Moth,Lymantria dispar

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