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Claudio C. Pasian, Daniel K. Struve, and Richard K. Lindquist

The effectiveness of two application methods of the insecticide imidacloprid in controlling 1) melon aphids (Aphis gossypii Glover) on `Nob Hill' chrysanthemum (Dendranthema ×grandiflora Ramat) plants and 2) silverleaf whitefly (Bemisia argentifolii Bellows & Perring) on `Freedom Red' poinsettia (Euphorbia pulcherrima Wild.) were compared. Plants were grown in containers with their interior covered by a mixture of flat latex paint plus several concentrations of imidacloprid (0, 10, 21, 42, and 88 mg·L−1), or treated with a granular application of the insecticide (1% a.i.) according to label recommendations. All imidacloprid treatments effectively reduced aphid survival for at least 8 weeks. The two most effective treatments were the granular application (10 mg a.i.) and the 88-mg·L−1 treatment (0.26 mg a.i). All imidacloprid treatments effectively reduced whitefly nymph survival. The 42- and 88-mg·L−1 treatment and the granular application (1% a.i.) were equally effective in reducing nymph numbers in lower poinsettia leaves. None of the plants given treatments with paint exhibited any phytotoxicity symptoms. These results suggest the possibility of a new application method for systemic chemicals with the potential of reducing the release of chemicals to the environment. Paint and imidacloprid mixes are not described in any product label and cannot be legally used by growers. Chemical name used: 1-[(6-chloro-3-pyrimidil)-N-nitro-2-imidazolidinimine (imidacloprid)

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Erfan K. Vafaie, H. Brent Pemberton, Mengmeng Gu, David Kerns, Micky D. Eubanks, and Kevin M. Heinz

example, management of whiteflies (Aleyrodidae) on poinsettia ( Euphorbia pulcherrima ) historically has relied on regular applications of insecticides ( Palumbo et al., 2001 ; Sharaf, 1986 ; Stevens et al., 2000 ), with some growers applying

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J.L. Bi and N.C. Toscano

California is a world leader in strawberry production. Since the late 1990s, strawberry production has been threatened by a major insect pest, the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae) ( Bi et al., 2002

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Gregory J. McKee, Frank G. Zalom, and Rachael E. Goodhue

The greenhouse whitefly, Trialeurodes vaporariorum (Westwood), is a cosmopolitan pest of greenhouse crops and ornamentals. It damages plants by feeding on nutrients in a plant's phloem, which may result in yield loss ( Byrne et al., 1990 ), and

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David J. Schuster

applying treatments, counting whiteflies, and evaluating fruit. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate

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Gunbharpur Singh Gill and Juang Horng Chong

Agricultural Statistics Service, 2019 ). Whiteflies (Aleyrodidae), particularly sweetpotato whitefly ( Bemisia tabaci ), are the most economically important arthropod pests of poinsettia ( Martin and Mound, 2007 ; Perring et al., 2018 ). Their presence is

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John L. Coffey, Alvin M. Simmons, B. Merle Shepard, Yaakov Tadmor, and Amnon Levi

Watermelon cultivars [ Citrullus lanatus (Thunberg) Matsum. and Nakai var. lanatus ] share a narrow genetic base ( Levi et al., 2001a ) and are susceptible to a large number of pests and diseases including whiteflies (Hemiptera: Aleyrodidae

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Cindy L. McKenzie and Joseph P. Albano

The sweetpotato whitefly has been reported in Florida since the late 1800s, but has only been considered a pest since 1986 when poinsettia ( Euphorbia pulcherrima ) growers began experiencing crop-damaging infestations ( Hamon and Salguero, 1987

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Judy G. Schmalstig and Heather J. McAuslane

Boyd for rearing the whiteflies and Karen Kelley for doing the thin sectioning, sample preparation, and photographing of the TEM sections. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations

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Kelechi Ogbuji, Gloria S. McCutcheon, Alvin M. Simmons, Maurice E. Snook, Howard F. Harrison, and Amnon Levi

://www.ars-grin.gov ) includes over 1800 U.S. PIs. These PIs have been useful sources of germplasm for identifying disease or pest resistance that through intensive breeding programs could be incorporated into elite watermelon cultivars. Whiteflies [ Bemisia tabaci (Gennadius