Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Brazil: the Big Outbreak Monitored by Light Traps

Specht, Alexandre; Sosa–Gómez, Daniel Ricardo; Rios, Danielly Albuquerque Medeiros; Claudino, Vander C M; Paula‐Moraes, Silvana V.; Malaquias, Juaci Vitória; Silva, Fernando Antônio Macena da; Roque–Specht, Vânia Ferreira

doi:10.1007/s13744-020-00836-0

Cited by 20 publications

(21 citation statements)

References 78 publications

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“…Considering the wide latitudinal range of the Americas, with the most-diverse ecosystems, many of which have been modified to support agriculture, including the cultivation of host plants of both species, studies on diapause are essential for both species during winter [89][90][91][92][93] and summer. 94 Monthly monitoring programs with pheromones or blacklight traps 70,80 should be evaluated in areas with different climatic conditions and at different latitudes, mainly in the Americas where the two species coexist. If diapause occurs, management actions should be initiated to reduce the number of diapausing pupae in the soil and prevent large numbers of moths from emerging the following spring.…”

Section: Noncomplementarity Ofmentioning

confidence: 99%

Helicoverpa armigera and Helicoverpa zea hybridization: constraints, heterosis, and implications for pest management

Rios

Specht

Roque–Specht

et al. 2021

Pest Management Science

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BACKGROUND: The invasion of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) into the New World has made it possible for this pest to hybridize with a native American species, H. zea (Boddie), under natural conditions. We investigated the viability and development of hybrids of these two Helicoverpa species. We reared the parental species and evaluated crosses between H. armigera males and H. zea females and vice versa, two intercrosses between hybrids, and eight backcrosses between hybrids and parental species. We estimated the length of immature stages, fecundity, survival, sex ratio, and heterosis. RESULTS: Although hybridization occcurred, with heterosis during the development of immatures, reproductive incompatibilities also were observed between the parental species and between hybrids from subsequent crosses. The interspecific crosses between hybrids and backcrosses confirmed the possibility of introgression events and their perpetuation in field populations. The results indicate that hybridization events are favored at high population levels, while at low population levels the 'species identities' will be maintained. CONCLUSIONS:The possibility of interspecific gene flow and its perpetuation through successive crosses and backcrosses suggests several recommenations for management. Populations of both species should be maintained at an equilibrium level to reduce the chance of interspecific crosses, which are presumably more likely to occur during pest outbreaks. The existence of hybridization and resistance to different active pesticide ingredients should be monitored. All practices related to managing the resistance of these pests to chemical and biological insecticides should be systematized to reduce the chance of selecting for resistant individuals.

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Section: Noncomplementarity Ofmentioning

confidence: 99%

Helicoverpa armigera and Helicoverpa zea hybridization: constraints, heterosis, and implications for pest management

Rios

Specht

Roque–Specht

et al. 2021

Pest Management Science

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“…It is one of the reliable and important measures of eco-friendly control of pest populations within the fields especially for adult beetles of the order Coleoptera [20,21]. At present, light trapping technology has been widely used in the monitoring and control of agricultural and forestry pests in several parts of the world with positive and promising results [22][23][24]. Previous studies have shown that most species of scarab beetles on sugarcane have strong phototaxis to light traps [25,26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Spectral Sensitivity and Light Intensity Response on the Phototactic Behavior of Exolontha castanea Chang (Coleoptera: Melolonthidae), a Pest of Sugarcane in China

et al. 2022

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The phototaxis of insects is closely related to light source factors, such as spectrum and light intensity. The cane grub, Exolontha castanea Chang (Coleoptera: Melolonthidae), is an important underground pest of sugarcane in Guangxi province of China. To clarify the effect of spectral sensitivity and light intensity response on the phototactic behavior of E. castanea, the phototactic behavior responses of male and female adults to 13 monochromatic lights in the wavelength range of 365–630 nm and different light intensities were measured. We found that both male and female adults had positive phototaxis to 13 monochromatic lights. The phototactic response rate of males and females at ultraviolet and violet light was the highest in the wavelength range of 365–420 nm. Among them, the most sensitive spectrum of females and males was at 365 nm and 420 nm, respectively. From the intensity response of phototactic behavior to different spectrum, the G1 (strong phototaxis) response rates of females at 365 nm and males at 420 nm were the highest. In addition, the phototactic response rate of females and males increased with the light intensity, showing a significant positive correlation. This study showed that the spectrum and light intensity were the key factors affecting the phototactic behavior of E. castanea. The sensitive spectrum of males and females were different, with a similar trend in phototaxis.

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“…This large knowledge gap for species without economic importance and immature stages of many species, in addition to the current highly mobile globalized world, climate change, and agricultural practices changes, may lead to overlook or to delay the detection of changes in pest diversity in the future (Cannon, 1998;Zhao et al, 2011). As evidenced by the recent invasion of the Old World cotton bollworm, Helicoverpa armigera (Hübner), into the New World (e.g., Czepak et al, 2013;Tay et al, 2013), whose similarity to the New World H. zea (Boddie) was likely an important factor for its delayed detection (Specht et al, 2013(Specht et al, , 2021. Hence, the use of tools that help in species identification regardless of their developmental stage becomes a priority.…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization and phylogenetic assessment of agricultural-related noctuids (Lepidoptera: Noctuidae) of South America

Blas

Baudino

Dias

et al. 2021

Rev. Bras. entomol.

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Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Brazil: the Big Outbreak Monitored by Light Traps

Cited by 20 publications

References 78 publications

Helicoverpa armigera and Helicoverpa zea hybridization: constraints, heterosis, and implications for pest management

Helicoverpa armigera and Helicoverpa zea hybridization: constraints, heterosis, and implications for pest management

Effect of Spectral Sensitivity and Light Intensity Response on the Phototactic Behavior of Exolontha castanea Chang (Coleoptera: Melolonthidae), a Pest of Sugarcane in China

Molecular characterization and phylogenetic assessment of agricultural-related noctuids (Lepidoptera: Noctuidae) of South America

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