Comparison of Management Strategies for Squash Bugs (Hemiptera: Coreidae) in Watermelon

Doğramacı, Mahmut; Shrefler, James W.; Roberts, Bill; Pair, S. D.; Edelson, J. V.

doi:10.1603/0022-0493-97.6.1999

Cited by 8 publications

(1 citation statement)

References 13 publications

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“…Data used for spatial distribution pattern determination were collected as part of a study conducted to evaluate management systems for squash bugs in watermelon (Dogramaci et al 2004a). Data were collected from treated and untreated watermelon Þelds that were representative of commercial production conditions.…”

Section: Methodsmentioning

confidence: 99%

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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Section: Methodsmentioning

confidence: 99%

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

Doğramacı

Shrefler

Edelson

2006

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Comparing Prophylactic Versus Threshold-Based Insecticide Programs for Striped Cucumber Beetle (Coleoptera: Chrysomelidae) Management in Watermelon

Ternest

Ingwell

Foster

et al. 2020

Journal of Economic Entomology

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In cucurbit crops such as watermelon, implementation of integrated pest management (IPM) is important due to the high reliance on bees for fruit set, along with mounting evidence of the risks of insecticide use associated with pollinator health. Yet, IPM adoption, on-farm pesticide use behaviors, their costs, and impacts on the primary insect pest (striped cucumber beetle, Acalymma vittatum F.) are poorly known in one of the key watermelon-growing regions, the Midwestern United States. To better understand how to implement IPM into watermelon production, we assessed pest management practices on commercial watermelon farms using 30 field sites in Indiana and Illinois over 2 yr in 2017 and 2018. Across all sampling dates, beetles never crossed the economic threshold of five beetles/plant at any farm and most were maintained at densities far below this level (i.e., <1 beetle/plant). Moreover, we documented a wide range of insecticide inputs (mean ca. 5 applications per field per season; max. 10 applications) that were largely dominated by inexpensive foliar pyrethroid sprays; however, insecticide application frequency was poorly correlated with pest counts, suggesting that most of these applications were unnecessary. We calculated that the cost of the average insecticide program far exceeds the cost of scouting, and thus IPM is estimated to save growers ca. $1,000 per field under average conditions (i.e., field size, insecticide cost). These data strongly indicate that current management practices on commercial farms in the Midwest would benefit from implementing more threshold-based IPM programs with potential increases in both farm profitability and pollination services.

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Ovipositional Preferences of Two Squash Bug Species, Anasa tristis and Anasa armigera (Heteroptera: Coreidae), for Different Cultivars and Species of Cucurbitaceae

Cornelius

2018

Journal of Insect Science

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The ovipositional preferences of two squash bug species, Anasa tristis (DeGeer) (Heteroptera: Coreidae) and Anasa armigera Say (Heteroptera: Coreidae), were evaluated in paired choice tests of different species and cultivars of plants in the family Cucurbitaceae. Females of A. tristis preferred to oviposit on the cultivar from which they were reared over three other cultivars of the same species. However, females did not show any ovipositional preference for different cultivars when they had no previous exposure to either cultivar. Females of A. tristis were equally likely to oviposit on Cucurbita pepo, Cucurbita maxima, and Cucurbita moschata but were significantly more likely to oviposit on C. pepo than on cucumber and watermelon. Females of A. armigera were equally likely to oviposit on C. pepo or cucumber, regardless of the species they were reared on. When A. armigera was reared on C. pepo, females were more likely to oviposit on C. maxima than on cucumber and less likely to oviposit on C. moschata than on cucumber.

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Comparison of Management Strategies for Squash Bugs (Hemiptera: Coreidae) in Watermelon

Cited by 8 publications

References 13 publications

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

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

Comparing Prophylactic Versus Threshold-Based Insecticide Programs for Striped Cucumber Beetle (Coleoptera: Chrysomelidae) Management in Watermelon

Ovipositional Preferences of Two Squash Bug Species, Anasa tristis and Anasa armigera (Heteroptera: Coreidae), for Different Cultivars and Species of Cucurbitaceae

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