Watermelon Growth, Fruit Yield and Plant Survival as Affected by Squash Bug (Hemiptera: Coreidae) Feeding

Edelson, J. V.; Duthie, J.; Roberts, W.

doi:10.1093/jee/96.1.64

Cited by 10 publications

(13 citation statements)

References 12 publications

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“…There is also the possibility that the female squash bug, by virtue of greater body weight, ingests and sustains a higher titer of the bacterium. Edelson et al (2002Edelson et al ( , 2003 determined that squash bug feeding severely impacts watermelon survival, growth, and yield. Consequently, the association of squash bug and CYVD, and the overwintering of the bacterium in the squash bug, substantially elevates this insectÕs economic pest status, particularly in areas where the disease has been reported.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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

Pair

Bruton

Mitchell

et al. 2004

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“…Similarities in production practices and pest problems have been documented in the region (Riley et al, 1998). In 1998 and 1999, a survey of watermelon growers was conducted in Oklahoma to characterize watermelon production in relation to yield, pest distribution, soil fertility, climatic conditions, and cultural practices, and to estimate variation in these characteristics statewide (Lu et al, 2002a;Lu et al, 2002b;Lu et al, 2003b;Dogramaci et al, 2004a;Edelson and Roberts, 2005). There have been similar local surveys, but on smaller scales, and relationships among survey variables were not systematically explored (Hilsenkopf and Suter, 1961;Matsumura et al, 1997;Chon et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Clustering of Management Tools in Oklahoma Watermelon Production Systems

Roberts

Taylor

et al. 2008

International Journal of Vegetable Science

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A statewide survey of watermelon production was conducted in 1998 and 1999 in Oklahoma. Data from the survey was used to classify production systems and management intensities among watermelon producers. Cluster analysis was used to identify the most closely associated of 24 abiotic and biotic variables affecting productivity. Five clusters were identified each year, or when data were pooled across years. Cluster I combined factors of grower experience, crop rotation, fertilization, and cultivation (mechanical weed control). Cluster II combined factors of cultivar ploidy, black plastic mulch, irrigation frequency, hoeing frequency, row arrangement, pollination, and planting method. Close distances among components implied that these two clusters had the strongest associations; indicating that two primary production systems exist. To measure management intensity of these production systems, a method was developed by: (1) partitioning four economic categories as machinery, labor, supply, and risk for each survey variable; (2) assigning weight scores of 0 or 1 to each category; and (3) summing the weight scores across economic categories for all factors involved in each production system. The most commonly used production system (>50%) consisted of Cluster I, which was considered of intermediate management intensity with scores Ն12 and Յ36. The production system considered as high management intensity with scores >36 was rarely used, but always combined components within Clusters I and II. This is the first attempt to describe complete production systems for watermelon in terms of analytical methods and measurements of crop management intensity.

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“…Approximately 16,000 ha (40,000 acres) is grown in the south central states of Texas and Oklahoma (USDA 1999). Adult squash bugs have been found to cause signiÞcant watermelon seedling mortality and yield reduction (Pair 1997;Edelson et al 2002Edelson et al , 2003. Thus, squash bug management in watermelon, especially during the seedling stage, is crucial for proÞtability.…”

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confidence: 99%

“…Thus, squash bug management in watermelon, especially during the seedling stage, is crucial for proÞtability. Squash bug damage can be more costly when expensive watermelon cultivars such as triploids (seedless) are used as transplants (Edelson et al 2002(Edelson et al , 2003.…”

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confidence: 99%

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

Doğramacı

Shrefler

Edelson

2006

Self Cite

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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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Watermelon Growth, Fruit Yield and Plant Survival as Affected by Squash Bug (Hemiptera: Coreidae) Feeding

Cited by 10 publications

References 12 publications

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

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

Clustering of Management Tools in Oklahoma Watermelon Production Systems

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

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