White grubs (Cyclocephala flavipennis) damaging perennial winter pastures in the South Region of Brazil

Duchini, Paulo Gonçalves; Echeverria, Joilson Roda; Américo, Luana Fidelis; Guzatti, Gabriela Cristina; Cherman, Mariana Alejandra; Sbrissia, André Fischer

doi:10.1590/0103-8478cr20160662

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…The larvae of Cyclocephala use soil with organic matter as food, therefore being important for nutrient cycling such as C. paraguayensis Arrow, 1913). On the other hand, these larvae may consume plant roots, and some species can cause damage to crops such as C. forsteri which has been reported as potential pest to soybean crops ("soja", Glycine max (L.) Merr, Fabaceae) (Santos & Ávila 2007), or such as Cyclocephala flavipennis Arrow, 1914, which has been registered damaging pastures (Duchini et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Description of mating behavior, life cycle, and antennal sensilla of Cyclocephala putrida Burmeister, 1847 (Coleoptera, Scarabaeidae, Dynastinae)

et al. 2020

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The genus Cyclocephala is common in Brazil (Coleoptera, Scarabaeidae, Dynastinae). The adults of some species are important pollinators, and the larvae develop in the soil, feed on organic matter, and contribute to nutrient cycle, but immatures of some species feed on plant roots, and some were registered causing damage in crops. The mating process of some phytophagous scarab beetles has a chemical recognition step, and the antenna is the main structure involved in the detection of odorants associated with insect communication. In the present study the mating behavior, life cycle, and antennal sensilla of C. putrida are described. The study was conducted at the Universidade Estadual de Mato Grosso do Sul, Cassilândia, Brazil. Adults were collected by a light trap installed from January 2016 to December 2017 and were taken to the laboratory for studies. Adults swarms are brief and were registered from January to February, and specimens were mostly collected at 20:00 to 22:00h. Chemical recognition may occur at least during one of the mating steps, during which the couple kept their antennae moving and the lamellae open, while females select males. In laboratory, the mating process lasted 7.5 minutes on average. The antennae of females have about 3399 sensilla and males about 4229 sensilla. Sensilla placodea types I, II, and III are the most abundant, and sensilla ampullacea, basiconica, and coeloconica are also present. The embryonic period lasted 16.0 days; first, second and third instars lasted 16.0, 48.3, and 165.3 days, respectively. The pupal period lasted 24.0 days. The period between egg deposition and adult emergency is about 271.5 days.

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Section: Introductionmentioning

confidence: 99%

Description of mating behavior, life cycle, and antennal sensilla of Cyclocephala putrida Burmeister, 1847 (Coleoptera, Scarabaeidae, Dynastinae)

et al. 2020

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“…In areas of natural pasture at the Brazilian Pampas, 28 species of Scarabaeidae were collected, distributed into the Dynastinae, Melolonthidae and Rutelinae (vAlmorbiDA et al 2018). DuChini et al (2017 identified four species of phytophagous Scarabaeidae in winter pastures of the Lages municipality, state of Santa Catarina.…”

Section: Resultsmentioning

confidence: 99%

Occurrence of Phytophagous Scarabaeidae (Coleoptera) in a pasture area at the Balsamo municipality, São Paulo, Brazil

Menis

Rodrigues

2021

EntomoBrasilis

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Pasture areas have been decreasing over the years in Brazil, largely due to the expansion of agricultural areas, mainly in the Southeast region. Natural or planted pastures are subject to attack by insects that can become pests depending on their level of infestation and among them are the Scarabaeidae beetles. The scarce information on the species of this family existing in the region of Bálsamo (São Paulo) makes a study on the occurrence of these species necessary, thus generating data that can contribute to identification and information on possible existing pest species. During September 2018 to August 2019, collections of phytophagous Scarabaeidae species were done in pasture areas with a light trap. A total of 446 adults from the subfamilies Dynastinae, Melolonthinae and Rutelinae were collected. In Dynastinae the genera Bothynus, Coelosis, Cyclocephala, Chalepides and Actinobolus were collected, in Melolonthinae the genera Plectris and Liogenys and in Rutelinae the genera Anomala, Geniates, Leucothyreus, Lobogeniates, Byrsopolis and Trizogeniates were found. Among the species collected, some are described as pests in crops, including pastures, such as Liogenys suturalis Blanchard, which was the species that had the largest number of individuals during the collection period, being indicated as a species worthy of more detailed studies.

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“…Over this period, 10 harvests were performed; we labelled cycles 1–10. Cycles 2 and 8 were discarded because of insect attacks [ 39 ] and operational issues ( S2 Table ).…”

Section: Methodsmentioning

confidence: 99%

Unraveling the forage productivity puzzle: Comparing fast and slow-growing grasses

Pittaro,

Duchini,

Guzatti

et al. 2024

PLoS ONE

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Functional traits are powerful tools for distinguishing between plants with different resource acquisition strategies. Fast-growing plants normally dominate resource-rich habitats and present trait values associated with high productivity, such as high specific leaf area (SLA), short leaf lifespan, and rapid leaf elongation rate (LER). In contrast, slow-growing species have a higher leaf weight ratio (LWR), leaf lifespan (LLS), and phyllochron, which are useful traits for survival in stressful and unfertile environments, but are normally thought to be incompatible with high productivity, even under fertile conditions. We tested the hypothesis that slow-growing forage grasses have demographic parameters (tiller population density and canopy density) that offset their slow individual traits, making them as productive as fast-growing species when grown in fertile soil. Species with contrasting growth strategies (Arrhenatherum elatius L. and Festuca arundinacea Schreb cv. Quantum II, fast and slow-growing species, respectively) were cultivated in 45 m2 field plots and subjected to the same cutting regime and nitrogen supply level. Functional traits and canopy attributes were continuously measured during 8 growing cycles after the establishment of the swards. A. elatius had higher SLA, LER, leaf senescence, and leaf appearance rates, whereas F. arundinacea had higher LLS and LWR values. Conversely, there were no differences in relative growth rate or forage accumulation. F. arundinacea was able to offset their plant functional traits, typically associated with slow-growing grasses, with some demographic parameter like higher tiller population density, allowing it to be as productive as the fast-growing A. elatius when both were grown in fertile soil. Therefore, we suggest cautionary use of traditional plant functional traits to explain and predict the annual productivity of slow-growing grasses.

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White grubs (Cyclocephala flavipennis) damaging perennial winter pastures in the South Region of Brazil

Cited by 10 publications

References 5 publications

Description of mating behavior, life cycle, and antennal sensilla of Cyclocephala putrida Burmeister, 1847 (Coleoptera, Scarabaeidae, Dynastinae)

Description of mating behavior, life cycle, and antennal sensilla of Cyclocephala putrida Burmeister, 1847 (Coleoptera, Scarabaeidae, Dynastinae)

Occurrence of Phytophagous Scarabaeidae (Coleoptera) in a pasture area at the Balsamo municipality, São Paulo, Brazil

Unraveling the forage productivity puzzle: Comparing fast and slow-growing grasses

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