Sweetpotato whitefly resistance to insecticides in Hawaii: intra‐island variation is related to insecticide use

Omer, A. D.; Johnson, Marshall W.; Tabashnik, Bruce E.; Costa, H. S.; Ullman, Diane E.

doi:10.1111/j.1570-7458.1993.tb01666.x

Cited by 24 publications

(17 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Attempts to manage B. argentifolli with the use of insecticides are not always successful, and overdependence on insecticides has resulted in resistant populations to selected classes of insecticides (Omer et al 1993, Crowder et al 2006. Insecticide failures in managing whiteßies in cucurbits and a recent trend toward more sustainable production practices and organic farming in Hawaii have caused a need for alternative pest management strategies.…”

mentioning

confidence: 99%

Influence of Cover Crop and Intercrop Systems onBemisia argentifolli(Hemiptera: Aleyrodidae) Infestation and Associated Squash Silverleaf Disorder in Zucchini

2009

View full text Add to dashboard Cite

Field experiments were conducted to evaluate the effects of cover cropping and intercropping on population densities of silverleaf whitefly, Bemisia argentifolli Bellow and Perring, and the incidence of squash silverleaf disorder (SSL) in zucchini, Cucurbita pepo L., in Oahu, HI. Two cover crops, buckwheat (BW), Fagopyrum esculentum Moench, and white clover (WC), Trifolium repens L., or sunn hemp (SH), Crotolaria juncea L., and an intercropped vegetable, okra, Abelmonchus esculentus L., were evaluated during the 2003, 2005, and 2006 growing seasons, respectively. Population densities of whiteflies and SSL severity varied during the three field experiments. In 2003, the severity of SSL and percentage of leaves displaying symptoms were significantly lower on zucchini plants in WC than BW plots throughout the crops' growth cycle. Additionally, the percentage of leaves per plant displaying SSL symptoms was significantly greater in bare-ground (BG) compared with the pooled BW and WC treatments on each inspection date. In 2005, zucchini intercropped with okra had lower numbers of adult whiteflies and resulted in significantly lower severity of SSL than pooled BW and WC treatments. During 2006, zucchini grown with SH had significantly lower numbers of all whitefly stages (i.e., egg, immature, and adult) and less SSL severity symptoms than BW. Despite these differences in whitefly numbers and SSL severity, marketable yields were not significantly lower in BW compared with WC or SH treatment plots during the study. The mechanisms underlying these results and the feasibility of using cover crops and intercrops to manage B. argentifolli and SSL are discussed.

show abstract

mentioning

confidence: 99%

Influence of Cover Crop and Intercrop Systems onBemisia argentifolli(Hemiptera: Aleyrodidae) Infestation and Associated Squash Silverleaf Disorder in Zucchini

2009

View full text Add to dashboard Cite

show abstract

“…Although tephritid fruit flies have not been shown to develop pesticide resistance, aphids (Hollingsworth et al, 1994 and1997), whiteflies (Omer et al, 1993) and leaf miners (Purcell et al, 1995) have developed resistance under constant foliar pesticide pressure in Hawaii. Even parasitoid-host complexes have shown resistance to the pesticides commonly used against foliar feeders such as leaf miners (Rathman et al 1995.…”

Section: Discussionmentioning

confidence: 99%

New sanitation techniques for controlling tephritid fruit flies (Diptera: tephritidae) in Hawaii

Klungness

Mau

Vargas

et al. 2005

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

New approaches to sanitation in a cropping system susceptible to tephritid fruit flies (Diptera tephritidae) in Hawaii have been investigated. Six trials were conducted in tent-like structures to demonstrate that melon fly larvae (Bacrocera cucurbitae, Coquillett) are not reliably controlled by malathion sprayed on the surface of whole or smashed fruit. Smashing fruit does not sufficiently reduce the rate of eclosion to be a reliable population control measure. Tilling fruit into the ground only partially reduced eclosion. Burying fruit 0.15 and 0.30 m deep also partially reduced eclosion. Burying fruit 0.46 m deep prevented adult fly eclosion. Screen between the infested fruit and the ground prevented 90.2% of fly eclosion (edges of the screen were buried to prevent the escape of eclosing adult flies). Larvae pupate within 0.7 m from their host fruit (mean distance = 13.88 ± 1.76 cm, 95% Cl = 10.4 to 17.4 cm). Augmentoria entrapped all adult flies eclosing from fruit placed inside the structure. The data suggests that the three (3) methods of interdicting adult fly eclosion should be practiced. They are, in order of effectiveness, placing cull fruit in augmentoria, burying the fruit 0.46 m under ground, or placing fruit on screen under and 0.7 m beyond the fruit pile.@ JASEM

show abstract

“…Entretanto, estudos já confi rmaram o desenvolvimento de resistência, em condições de campo ou de laboratório, de B. tabaci a inseticidas de diversos grupos químicos, tais como organofosforados (Ahmad et al 2002, Omer et al 1993a, carbamato (Omer et al 1993a), piretróides (Omer et al 1993a, Cahill et al 1995, Ahmad et al 2002, ciclodieno (Perry 1985, Ahmad et al 1987, reguladores de crescimento (Cahill et al 1994, 1996b, Dennehy & Williams 1997 e neonicotinóides (Cahill et al 1996a, Elbert & Nauen 2000, Dennehy et al 2005.…”

unclassified

“…O manejo da resistência tem como fi nalidade retardar ou reverter a evolução da resistência em pragas (Omer et al 1993a). O sucesso de qualquer programa de manejo da resistência está relacionado a meios rápidos e efi cientes para detectar e monitorar a resistência em populações de pragas no campo (Bush et al 1993).…”

unclassified

Monitoramento da suscetibilidade a inseticidas em populações de Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) no Brasil

Silva¹,

Omoto²,

Bleicher³

et al. 2009

Neotrop. entomol.

View full text Add to dashboard Cite

-Monitoring the susceptibility of a pest population to pesticides is essential for resistance management programs. The objective of this research was to evaluate the genetic variability in pesticide susceptibility in populations of Bemisia tabaci (Gennadius) collected from different Brazilian agricultural regions through the use of two different tests. Four whitefl y populations, two from Goiás state (GO-1 and GO-2) e two from Bahia state (BA-1 and BA-2), were tested against a susceptible reference one (SusIAC). A residual contact bioassay was used to evaluate the pesticide susceptibility of each population by using diagnostic concentration bioassays and by estimating the baseline susceptibility data to each one of the tested insecticides, acetamiprid, imidacloprid, thiamethoxam, chlorpyrifos and endosulfan. Adult insects of unknown age and sex were tested. Evaluations were performed after 24h for endosulfan and 48h for the other chemicals. Both procedures showed signifi cant differences in the susceptibility to the pesticides among B. tabaci populations. However, the discrimination among B. tabaci populations was more evident with the use of diagnosis tests. The population GO-2 was signifi cantly less susceptible to the tested pesticides than SusIAC, mainly to neonicotinoids. The most critical resistance situation of B. tabaci was detected to thiamethoxam, followed by imidacloprid.KEY WORDS: Whitefl y, biotype B, baseline susceptibility, chemical control, monitoring resistance RESUMO -O monitoramento da suscetibilidade de pragas a praguicidas é essencial para programas de manejo da resistência. O objetivo deste trabalho foi verifi car a variabilidade genética de populações de Bemisia tabaci (Gennadius), oriundas de diferentes áreas agrícolas, quanto a suscetibilidade a inseticidas no Brasil, por meio de dois testes diferentes. Quatro populações de mosca-branca foram testadas em relação a uma população suscetível de referência (SusIAC); duas oriundas de Goiás (GO-1 e GO-2) e outras duas da Bahia (BA-1 e BA-2). Uma técnica de bioensaio do tipo contato residual foi empregada para realização dos testes: 1) teste diagnóstico da resistência; e 2) teste para obtenção das linhas de suscetibilidade das populações. Os produtos utilizados foram acetamipride, imidaclopride, tiametoxam, clorpirifós e endosulfam. Utilizaram-se insetos adultos não separados por sexo e nem por idade nos testes. As avaliações foram realizadas em 24h, para o teste com endosulfam, e em 48h, para os demais produtos. Ambos os testes revelaram variabilidade genética quanto à suscetibilidade de mosca-branca aos inseticidas. No entanto, a discriminação entre as populações de B. tabaci foi mais evidente com o uso de testes diagnósticos. A população GO-2 foi signifi cativamente menos suscetível aos produtos testados que a SusIAC, principalmente em relação aos neonicotinóides. A situação mais crítica de resistência de mosca-branca foi com tiametoxam, seguida pelo imidaclopride. PALAVRAS-CHAVE

show abstract

Sweetpotato whitefly resistance to insecticides in Hawaii: intra‐island variation is related to insecticide use

Cited by 24 publications

References 20 publications

Influence of Cover Crop and Intercrop Systems onBemisia argentifolli(Hemiptera: Aleyrodidae) Infestation and Associated Squash Silverleaf Disorder in Zucchini

Influence of Cover Crop and Intercrop Systems onBemisia argentifolli(Hemiptera: Aleyrodidae) Infestation and Associated Squash Silverleaf Disorder in Zucchini

New sanitation techniques for controlling tephritid fruit flies (Diptera: tephritidae) in Hawaii

Monitoramento da suscetibilidade a inseticidas em populações de Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) no Brasil

Contact Info

Product

Resources

About