Tarnished Plant Bug (Hemiptera: Miridae) Thresholds for Cotton Before Bloom in the Midsouth of the United States

Musser, Fred R.; Lorenz, G. M.; Stewart, Scott; Bagwell, R. D.; Leonard, B. R.; Catchot, Angus L.; Tindall, Kelly V.; Studebaker, Glenn; Akin, D. Scott; Cook, Donald R; Daves, C. A.

doi:10.1603/029.102.0614

Cited by 30 publications

(30 citation statements)

References 14 publications

(13 reference statements)

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“…Significant reductions in Lygus numbers due to MON 88702 have previously been documented in cage studies with high densities of Lygus , but yield data were not recorded in those studies. Populations of Lygus during the season are considered significant factors affecting yield; however, not all life stages of Lygus are equally damaging. Like stink bugs, larger Lygus nymphs are considered more damaging to cotton than small nymphs .…”

Section: Discussionmentioning

confidence: 99%

First transgenic trait for control of plant bugs and thrips in cotton

Akbar

Gowda

Ahrens

et al. 2018

Pest Management Science

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BACKGROUND Plant bugs (Lygus spp.) and thrips (Thrips spp.) are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties. Thus, seed or foliar‐applied chemical insecticides are typically required to protect cotton from these pest groups. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Previous publications documented the efficacy of transgenic cotton event MON 88702 against plant bugs and thrips in limited laboratory and field studies. Here, we report results from multi‐location and multi‐year field studies demonstrating efficacy provided by MON 88702 against various levels of these pests. RESULTS MON 88702 provided a significant reduction in numbers of Lygus nymphs and subsequent yield advantage. MON 88702 also had fewer thrips and minimal injury. The level of control demonstrated by this transgenic trait was significantly better compared with its non‐transgenic near‐isoline, DP393, receiving insecticides at current commercial rates. CONCLUSION The level of efficacy demonstrated here suggests that MON 88702, when incorporated into existing IPM programs, could become a valuable additional tool for management of Lygus and thrips in cotton agroecosystems experiencing challenges of resistance to existing chemical control strategies. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

First transgenic trait for control of plant bugs and thrips in cotton

Akbar

Gowda

Ahrens

et al. 2018

Pest Management Science

View full text Add to dashboard Cite

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“…In addition, Louisiana recommends a sweep net threshold (Bagwell 2008), and Mississippi recommends thresholds for sweep nets and visual observation (Catchot 2008) during the ßowering period. In contrast, sampling methods and thresholds during the preßowering stages of cotton plant development are based on both insect counts and square retention in each of those states (Musser et al 2007(Musser et al , 2009b. Currently, a plant-based threshold similar to square retention that monitors plant injury over time does not exist during the ßowering period.…”

Section: Discussionmentioning

confidence: 99%

“…During preßowering stages, thresholds are based on numbers of tarnished plant bugs using a sweep net and on square retention (Musser et al 2007). Thresholds for tarnished plant bug range from 8 to 15 bugs per 100 sweeps or 70 Ð 85% square retention during the preßowering stages of plant development (Musser 2009b). During the ßowering stages, thresholds are based on drop cloth samples, but no consideration is given for a plant-based threshold like that of square retention during the preßowering stages.…”

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confidence: 99%

Development of a Plant-Based Threshold for Tarnished Plant Bug (Hemiptera: Miridae) in Cotton

et al. 2012

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The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is an important pest of cotton, Gossypium hirsutum L., in the mid-southern United States. It is exclusively controlled with foliar insecticide applications, and sampling methods and thresholds need to be revisited. The current experiment was designed to establish a plant-based threshold during the flowering period of cotton development. Experiments were conducted in MisSissippi in 2005 and 2006, Arkansas in 2005, and Louisiana in 2005 through 2008. Treatments consisted of various combinations of thresholds based on the percentage of dirty squares that were compared with the current threshold with a drop cloth or automatic weekly applications. Dirty squares were characterized as those with yellow staining on the developing bud resulting from tarnished plant bug excrement. Treatments consisted of 5, 10, 20, and 30% dirty squares. Each plot was sampled weekly, and insecticides were applied when the mean of all replications of a particular treatment reached the designated threshold. At the end of the season, plots were harvested and lint yields were recorded. Differences were observed in the number of applications and yields among the different treatments. The 10% dirty squares threshold resulted in a similar economic return compared with the drop cloth. A threshold of 10% dirty squares resulted in a similar number of insecticide applications, yields, and economic returns compared with that observed with the drop cloth. These results suggest that a threshold of 10% dirty squares could be used to trigger insecticide applications targeting tarnished plant bugs in flowering cotton.

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“…During the preßowering stages, tarnished plant bug adult densities were determined by taking 25 sweeps with a standard 38 cm diameter sweep net. Previous research has shown the sweep net to be the most effective sampling method to determine tarnished plant bug population levels during the preßowering period because populations at this time are made up of migrating adults (Musser et al 2009b). Furthermore, during the preßowering period, square retention was measured to determine the number of Þrst position squares present per 25 plants in each plot.…”

Section: Methodsmentioning

confidence: 99%