Population Dynamics in the Squash Bug (Heteroptera: Coreidae)-Squash Plant (Cucurbitales: Cucurbitaceae) System in Oklahoma1

Fargo, W. S.; Rensner, P. E.; Bonjour, E. L.; Wagner, Terence L.

doi:10.1093/jee/81.4.1073

Cited by 21 publications

(11 citation statements)

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“…THE SQUASH BUG, Anasa tristis (DeGeer), is an economically important pest of cucurbit crops in North America (Beard 1940, Eichmann 1945, Fargo et al 1988). Squash bug adults emigrate from host plants in late summer and fall and move to protected refuge areas to overwinter (Beard 1940).…”

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confidence: 99%

Watermelon Seedling Growth and Mortality as Affected by <I>Anasa tristis</I> (Heteroptera: Coreidae)

Edelson

Duthie

Roberts

2002

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Adult squash bugs, Anasa tristis (De Geer), were confined on seedling watermelon plants at densities of zero, one, two, and four per plant. Squash bugs were allowed to feed on the plants until plants died or reached 30 cm in height. Number of leaves and length of plant vine were recorded at 2- or 3-d intervals. Seedling foliage, stems, and roots were harvested and dried after plants reached 30 cm in height. Growth of seedlings was regressed on number of squash bugs and results indicated that an increasing density of squash bugs feeding on seedlings resulted in a significant reduction in plant growth. Additionally, increased density of squash bugs resulted in reduced weight of foliage and root dry biomass. Seedling mortality increased as the density of squash bugs increased.

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Watermelon Seedling Growth and Mortality as Affected by <I>Anasa tristis</I> (Heteroptera: Coreidae)

Edelson

Duthie

Roberts

2002

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“…It has been found to cause considerable damage to plants in the genus Cucurbita such as squash (Quaintance 1899, Isley 1927, Beard 1940, Metcalf and Flint 1962, Fargo et al 1988, Nechols 1987, Bonjour et al 1990). Host plants have a significant effect on development, life span, and reproduction of the squash bug Fargo 1989, Bonjour et al 1990).…”

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Spatial Pattern and Sequential Sampling of Squash Bug (Heteroptera: Coreidae) Adults in Watermelon

Doğramacı

Shrefler

Edelson

2006

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Spatial distribution patterns of adult squash bugs were determined in watermelon, Citrullus lanatus (Thunberg) Matsumura and Nakai, during 2001 and 2002. Results of analysis using Taylor's power law regression model indicated that squash bugs were aggregated in watermelon. Taylor's power law provided a good fit with r2 = 0.94. A fixed precision sequential sampling plan was developed for estimating adult squash bug density at fixed precision levels in watermelon. The plan was tested using a resampling simulation method on nine and 13 independent data sets ranging in density from 0.15 to 2.52 adult squash bugs per plant. Average estimated means obtained in 100 repeated simulation runs were within the 95% CI of the true means for all the data. Average estimated levels of precision were similar to the desired level of precision, particularly when the sampling plan was tested on data having an average mean density of 1.19 adult squash bugs per plant. Also, a sequential sampling for classifying adult squash bug density as below or above economic threshold was developed to assist in the decision-making process. The classification sampling plan is advantageous in that it requires smaller sample sizes to estimate the population status when the population density differs greatly from the action threshold. However, the plan may require excessively large sample sizes when the density is close to the threshold. Therefore, an integrated sequential sampling plan was developed using a combination of a fixed precision and classification sequential sampling plans. The integration of sampling plans can help reduce sampling requirements.

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“…Prominent among cucurbit insect pests is the squash bug, Anasa tristis (De Geer), long recognized as a serious and pervasive problem of cucurbit crops throughout much of the United States (Quaintance 1899, Beard 1940. Historically, squash bugs prefer squash and pumpkin, Cucurbita spp., as hosts and have been serious pests of these crops in Texas and Oklahoma (Fargo et al 1988, Stroup 1998. In contrast to previous reports, squash bugs have become an increasing concern for growers of watermelon and cantaloupe in Texas and Oklahoma (Pair 1997, Riley et al 1998, Edelson et al 1999.…”

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Overwintering Squash Bugs Harbor and Transmit the Causal Agent of Cucurbit Yellow Vine Disease

Pair

Bruton

Mitchell

et al. 2004

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Since 1988, cucurbit crops, particularly watermelon, cantaloupe, and squash, grown in Oklahoma and Texas have experienced devastating losses from cucurbit yellow vine disease (CYVD), caused by the phloem-limited bacterium Serratia marcescens Bizio. Squash bug, Anasa tristis (De Geer), is a putative vector of the pathogen. In 2000-2001, overwintering populations of squash bug collected from DeLeon, TX, were tested for their ability to harbor and transmit the bacterium. Individual squash bugs (n = 73) were caged serially for periods of up to 7 d on at least four squash seedlings. Two studies were conducted, one with insects collected in November 2000 placed on first true leaf-stage seedlings and the second with insects from an April 2001 collection, placed on 3-5 true leaf-stage squash. Controls consisted of squash seedlings caged without insects. Squash bug transmission rates of the pathogen in studies I and II were 20 and 7.5%, respectively. Overall, 11.0% of the squash bugs harbored and successfully transmitted the bacterium to squash seedlings. All control plants tested negative for S. marcescens and did not exhibit CYVD. Female squash bugs killed a significantly greater proportion of young first leaf-stage seedlings than males. Feeding on 3-5 leaf-stage squash resulted in no plant mortality regardless of squash bug gender. This study demonstrated that the squash bug harbors S. marcescens in its overwintering state. The squash bug-S. marcescens overwintering relationship reported herein greatly elevates the pest status of squash bug and places more importance on development of integrated strategies for reducing potential overwintering and emerging squash bug populations.

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Population Dynamics in the Squash Bug (Heteroptera: Coreidae)-Squash Plant (Cucurbitales: Cucurbitaceae) System in Oklahoma1

Cited by 21 publications

References 0 publications

Watermelon Seedling Growth and Mortality as Affected by <I>Anasa tristis</I> (Heteroptera: Coreidae)

Watermelon Seedling Growth and Mortality as Affected by <I>Anasa tristis</I> (Heteroptera: Coreidae)

Spatial Pattern and Sequential Sampling of Squash Bug (Heteroptera: Coreidae) Adults in Watermelon

Overwintering Squash Bugs Harbor and Transmit the Causal Agent of Cucurbit Yellow Vine Disease

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