Seasonal Activity of
Helicoverpa zea
and
Heliothis virescens
(Lepidoptera: Noctuidae) Detected by Pheromone Traps in the Rolling Plains of Texas

Parajulee, Megha N.; Slosser, J. E.; Boring, Emory P.

doi:10.1093/ee/27.5.1203

Cited by 19 publications

(17 citation statements)

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“…Witz et al (1985) showed that pheromone trap catches recorded early in the season correlated with subsequent seasonal population dynamics. Parajulee et al (1998) found a signiÞcant positive correlation in pheromone trap captures between adjacent months in the Texas Rolling Plains, the region bordering the High Plains to the east. Pheromone trap catches have also been used in Þeld population estimation (Hartstack et al 1978, Hartstack andWitz 1981).…”

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confidence: 86%

“…Pheromone traps have been used to quantify bollworm and tobacco budworm moth seasonal population dynamics (Witz et al 1985, Goodenough et al 1988, Leonard et al 1989, Parajulee et al 1998), migration (Hartstack et al 1982, and spatial distribution (Slosser et al 1987). Witz et al (1985) showed that pheromone trap catches recorded early in the season correlated with subsequent seasonal population dynamics.…”

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confidence: 99%

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Long-Term Seasonal Abundance Patterns of Helicoverpa zea and Heliothis virescens (Lepidoptera: Noctuidae) in the Texas High Plains

Parajulee¹,

Rummel²,

Arnold³

et al. 2004

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Bollworm, Helicoverpa zea (Boddie), and tobacco budworm, Heliothis virescens (F.), male adult (moth) activities were monitored between 1982 and 1995 by using sex pheromone traps in the Texas High Plains. Moths were monitored weekly from early March to mid-November near Lubbock and Halfway, two prominent cotton production areas in the Texas High Plains region. Based on trap captures, the bollworm-budworm complex consisted of approximately 98% bollworms and approximately 2% tobacco budworms. Seasonal activity patterns varied between location for bollworm but not for tobacco budworm. The 14-yr average (+/- SE) bollworm moth abundance (moths per trap per week) at Lubbock was significantly higher (226.5 +/- 10.4) compared with that at Halfway (153.7 +/- 8.1). Correlation analyses showed a significant positive relationship between moth abundance and average weekly temperatures, whereas a significant negative relationship was observed between moth abundance and average weekly wind velocity for both species. Analyses also showed a positive correlation between moth abundance and cumulative degree-days (> 0.0 degrees C) from 1 January. A strong positive relationship was observed between moth abundance and weekly average precipitation for both species. Average weekly abundances were positively correlated between adjacent months during most of the active cotton fruiting season (June-September). However, the relationship between populations that contributed to the overwintering generation and the following spring populations varied between species and study sites. Nevertheless, data from this study indicated that late-season moth catches could be indicative of the dynamics of the early-season moth catches the following year in the High Plains. The mean population abundance curve based on 14-yr averages showed two bollworm population peaks at Lubbock, but only one peak at Halfway. Separate degree-day-based models were developed to describe long-term seasonal abundance patterns of bollworm moths for the Lubbock and Halfway sites.

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confidence: 86%

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confidence: 99%

Long-Term Seasonal Abundance Patterns of Helicoverpa zea and Heliothis virescens (Lepidoptera: Noctuidae) in the Texas High Plains

Parajulee¹,

Rummel²,

Arnold³

et al. 2004

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“…We estimated the abundance of H. zea moths at each site using Hartstack cone type pheromone traps (Westbrook et al, 1997;Parajulee et al, 1998) baited with a Zealure sex pheromone (Hercon Environmental, Emigsville, PA). These traps have an attraction range of about 20 ha or 0.2 km 2 (Schneider, 1999).…”

Section: Quantifying Moth Abundancementioning

confidence: 99%

The importance of natural habitats to Brazilian free-tailed bats in intensive agricultural landscapes in the Winter Garden region of Texas, United States

Davidai

Westbrook²,

Lessard

et al. 2015

Biological Conservation

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a b s t r a c tThe conversion of natural lands to agriculture is a leading cause of the worldwide loss of biodiversity. In particular, cropland monocultures alter insect abundance and diversity compared to adjacent natural habitats. While agricultural lands can provide large numbers of insect pests as prey items to predators such as bats, insect pest population size vary greatly throughout growing seasons. This study assesses the importance of land use and corn earworm moth availability as spatial and temporal drivers of bat activity. We quantified spatial variation in land use patterns at fifteen sites located within the Winter Garden region in south central Texas and used bat detectors and insect pheromone traps to monitor nightly bat activity and corn earworm moth abundance across the landscape and throughout most of the year. Our temporal analyses show that bat activity was positively correlated with moth abundance, but only early in the growing season when moth abundance is at its peak. The key result from this study is a positive relationship between bat activity and natural habitat cover during late summer months, corresponding to periods of low moth abundance and a peak in bat activity. During the late summer period, bats were more active at sites containing a larger percentage of natural habitats than those containing a larger percentage of agricultural land. Our results strongly suggest that intensive agricultural practices create systems providing bats with inconsistent resource supply, but the persistence of natural habitats provides consistency in food supply though time. Taken together, these findings illustrate the importance of protecting and restoring natural habitats for the conservation for bats and the pest-suppression services they provide in agricultural ecosystems.

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“…Bollworm numbers were estimated by visually counting the number of larvae present in 2 m of cotton row at two locations (4 m of row total) in each plot from 8 July to 19 August 1996 (7 weeks) and from 21 July to 12 August 1997 (4 weeks). Tobacco budworms, Helicoverpa virescens (F.), were included in the bollworm larval counts, but based on long-term moth captures in pheromone traps, tobacco budworms represented only « 7% of the bollworm/budworm complex (Parajulee et al 1998). Numbers of cotton aphids were counted visually on 10 leaves from the top-half and on 10 leaves from the bottom half of the plant in each plot.…”

Section: Insect Samplingmentioning

confidence: 99%

Evaluation of food sprays and relay strip crops for enhancing biological control of bollworms and cotton aphids in cotton

Slosser¹,

Parajulee²,

Bordovsky³

2000

International Journal of Pest Management

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Studies were conducted at the Texas Agricultural Experiment Station research farms located at Munday (1996 test) and Chillicothe (1997 test) to evaluate relay strip crops in combination with a food spray to enhance biological control of bollworms, Helicoverpa zea (Boddie), and cotton aphids, Aphis gossypii Glover, in cotton. The relay crops included fall plantings of hairy vetch, Vicia villosa Roth, and canola, Brassica napus L., and a spring planting of grain sorghum, Sorghum bicolor L. Cotton, Gossypium hirsutum L., was planted between the relay crops or was isolated from the relay crops. Treatments within the two cotton systems included an untreated check plot, a plot sprayed with sugar+yeast (food spray) during summer to attract and hold predator insects, a plot sprayed with biological (`soft') insecticides for bollworm and cotton aphid control (Bacillus thuringiensis and pymetrozine, respectively), and a plot sprayed with harsh insecticides for bollworm and cotton aphid control (zeta cypermethrin and dicrotophos or profonofos, respectively). A split-plot experimental design, with three replications, was used where whole plots included relay and isolated cotton systems and subplots were the four food/ chemical treatments. Predator numbers were monitored with a vacuum sampler once a week in relay crops and cotton. Bollworms and cotton aphids were monitored visually once a week in cotton during July and August. Total predator numbers were higher in cotton adjacent to relay crops in 1996, but not in 1997. The food spray did not enhance attraction and retention of predators either year. Bollworm larval numbers were significantly higher in relay cotton, food spray plots in 1996. Bollworm larval numbers were similar in relay and isolated cotton, and larval numbers were significantly reduced only in the plot where zeta cypermethrin (harsh insecticide plot) was used. In 1996, cotton aphid numbers in the relay cotton system were significantly higher in the untreated check plots in relation to numbers in the food spray, soft insecticide, and harsh insecticide plots, which were statistically similar. In the isolated cotton system, aphid numbers were highest in untreated plots, intermediate in food spray and soft insecticide plots, and lowest in the harsh insecticide plots. Aphid numbers increased more rapidly in the harsh insecticide plots that had been treated previously for bollworm control. The food spray and pymetrozine treatments reduced cotton aphids more effectively in the relay cropping system than in the isolated cotton system. Bollworms and cotton aphids did not reach pest status in 1997. The combination of a relay cropping system with a food spray did not enhance predator numbers and did not aid in retention of predators in cotton during August. Sucrose in the food spray attracted high numbers of bollworms in 1996.

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Seasonal Activity of Helicoverpa zea and Heliothis virescens (Lepidoptera: Noctuidae) Detected by Pheromone Traps in the Rolling Plains of Texas

Cited by 19 publications

References 0 publications

Long-Term Seasonal Abundance Patterns of <I>Helicoverpa zea</I> and <I>Heliothis virescens</I> (Lepidoptera: Noctuidae) in the Texas High Plains

Long-Term Seasonal Abundance Patterns of <I>Helicoverpa zea</I> and <I>Heliothis virescens</I> (Lepidoptera: Noctuidae) in the Texas High Plains

The importance of natural habitats to Brazilian free-tailed bats in intensive agricultural landscapes in the Winter Garden region of Texas, United States

Evaluation of food sprays and relay strip crops for enhancing biological control of bollworms and cotton aphids in cotton

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