Editorial Type:
Article Category: Research Article
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Online Publication Date: 01 Mar 1997

Evaluation of Newer Chemicals for Control of Foliar Nematode on Begonia

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Page Range: 16 – 18
DOI: 10.24266/0738-2898-15.1.16
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Abstract

Eight new chemical compounds were evaluated for control of foliar nematode (Aphelencoides fragariae) on several cultivars of begonia (Hiemalis group). Two greenhouse experiments were conducted in 1993, one in 1994, and one in 1995, using foliar nematode-infested begonia cultivars, and treating them with abamectin, azadirachtin, bifenthrin, carbosulfan, cyromazine, diflubenzuron, fenoxycarb or imidacloprid. Oxamyl was included for comparison because of its known activity against this nematode. None of the newer chemicals was effective in reducing the population of foliar nematodes at the rates tested, whereas one application of 10% granular oxamyl at 0.12 g/l5 cm (0.004 oz/6in) pot was as effective as higher rates or multiple applications in suppressing the populations.

Keywords: leaf nematode; Aphelencoides fragariae ; insect growth regulators; carbamates; nematodes; Avid (abamectin), a mixture of avermectins containing >80% avermectin B,a, and <20% avermectin B,b; Azatin (azadiractin), a group of closely related isomers, a steroid-like tetranortriterpenoid derived from neem seed; Biflex (bifenthrin), (2-methyl[1,1-biphenyl]-3-yl) methyl 3-(2-chloro-3,3,3,trifluoro-l-propeny1)-2,2-dimethyl cyclopropanecarboxylate; Advantage 4EC and Marshall (carbosulfan),(2,3,-dihydro-2,2-dimethyl-7-benzofuranyl((dibutylamino)thio)methylcarbamate) Citation® 75 WP (cyromazine), N-cyclopropyl-l,3,5-triazine-2,4,6-triamine; Dimilin (diflubenzuron), 1-(4-chlorophenyl)3-(2,6-difluorobenzzoylurea; Precision 25 WP (fenoxycarb), ethyl (2-[4-phenoxyphenoxy] ethyl), carbamate; Merit (imidacloprid),1-[(6-chloro-3-pyridinyl)methyl]N-nitro-2-imidazolidinimine; Vydate (oxamyl) and Oxamyl 10 G (oxamyl), methyl N'N'-dimethyl-N-[(methylcarbamoyl) oxy T-1-thiooxamidate]
Copyright: Copyright, All Rights Reserved 1997

Contributor Notes

The authors acknowledge Oglevees, Inc. for the donation of plant material used in these studies, and Drs. S. K. Braman and D. L. Olson for their critical review of this manuscript.

2Professor and Agricultural Research Assistant III, Department of Plant Pathology.

3Professor and Agricultural Research Assistant III, Department of Entomology.

Received: 26 Jul 1996
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