Survival and injuries of Deois flavopicta (Stal., 1854) in pastures under seed treatment with insecticides and dry mass yield

Pereira, Marcelo Francisco Arantes; Junior, A. de Favare; Auad, Alexander Machado; Costa, Marilia Gregolin

doi:10.1590/1808-1657000722016

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…As for the susceptibility of species to the leafhopper attack, grasses of the Brachiaria genus are preferentially attacked by these insects (BORGHI et al, 2018), as verified by scientific studies, such as the one carried out by Auad et al (2009) and Pereira et al (2018). These studies found a higher leafhopper population density in the Brachiaria brizantha and Brachiaria decumbens species, respectively.…”

Section: Introductionmentioning

confidence: 80%

Population dynamics of the pasture leafhopper complex (Hemiptera: Cercopidae) in brachiaria and mombasa grass

Sousa

Silva

Campos

et al. 2021

R. Agrogeoambiental

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Pasture leafhoppers are considered highly important pests in forage grasses in Brazil due to their widespread occurrence. This insect is one of the most relevant pests in pasture degradation. In order for the control of spittlebugs to be efficient, it is important to know the population behavior of the species of this insect, identify the period of greatest occurrence, as well as the climatic and environmental conditions that favor the development of the pest. Thus, this study aimed to evaluate the population dynamics of spittlebugs, at a quantitative level, in Brachiaria decumbens and Panicum maximum pastures, associating the results with meteorological data from the municipality of Conceição do Araguaia, Southeast Pará. To study the population dynamics of spittlebugs, samples were taken every two weeks, in two types of pastures aged between 5 and 7 years, kept under rotational grazing, with a stocking of 1.5 animal units. The method of monitoring nymphs and adults of leafhoppers was adopted, through walking within the observation area. The level of infestation of spittlebugs in both forage species was evaluated and all results were submitted to analysis of variance by the F test. It was found that the species B. decumbens had a greater number of adults and nymphs when compared to the forage species P. maximum. The population dynamics of spittlebugs occur gradually according to climatic conditions, and the period with not-so-high temperatures (22 ºC to 34 ºC) and good rainfall provide an infestation of this insect pest in the pasture.

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Section: Introductionmentioning

confidence: 80%

Population dynamics of the pasture leafhopper complex (Hemiptera: Cercopidae) in brachiaria and mombasa grass

Sousa

Silva

Campos

et al. 2021

R. Agrogeoambiental

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“…The literature is poor reporting efficacy of spittlebug control strategies for forage species. Recently, Pereira et al 43 reported Thiamethoxam as an effective strategy for seed treatment of signal grass to control D. flavopicta.…”

Section: Discussionmentioning

confidence: 99%

Spittlebug damage on tropical grass and its impact in pasture-based beef production systems

Congio

Almeida

Barreto

et al. 2020

Sci Rep

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Spittlebugs are the main pest of tropical pastures and Marandu palisade grass (Urochloa brizantha cv. Marandu) is the most representative cultivated pasture in the tropics. Our objective was to characterize Marandu palisade grass responses subjected to Mahanarva (Hemiptera: Cercopidae) attack and to estimate the losses in terms of beef production from pasture-based systems. A set of five experiments were carried out. Three consecutive years of monitoring showed that Mahanarva spittlebugs increased their abundance after first rains with three to four peaks throughout the wet season. A decrease of 66% on herbage yield was observed in the greenhouse trial, with an average decrease of 61% on pools of calcium, magnesium, phosphorus, sulfur, potassium, crude protein, neutral-detergent fiber and in vitro digestible dry matter of Marandu palisade grass. Results from field experiments corroborated with greenhouse trial showing decreases on herbage yield varying from 31 to 43% depending on level of fertilization and grazing severity of Marandu palisade grass. Finally, an unprecedented 154-ha field experiment indicated that Mahanarva decreases 74% the beef productivity (i.e. kg body weight ha −1) of Nellore heifers grazing Marandu palisade grass. Brazil has the largest commercial beef cattle herd and is one of the top beef exporters in the world 1. Brazilian beef represents 20% of all global beef trading and, together with other agricultural commodities, it sums to about 21% of gross domestic product in Brazil 2. Beef cattle production in Brazil is characterized by pasture-based systems of which almost 90% of the cattle slaughtered comes from 3. However, despite highly representative, pasture-based livestock systems are extensive and conducted with low technology inputs resulting in low stocking rates (SR) and animal performance (i.e. average daily gain, ADG). Studies have reported beef production greater than 1,500 kg of body weight (BW) ha year −1 whilst the Brazilian average is much lower at about 150 kg BW ha year −14. Many factors stand out as key drivers for this poor productivity, among them: inadequate grazing management strategies, low soil fertility, and pest damage 5. The 215 million head of cattle in Brazil occupy approximately 160 million hectares composed by 70% of cultivated pasture species and 30% of native grasslands 6,7. Marandu palisade grass {Brachiaria brizantha (Hochst. ex A. Rich.) R. D. Webster [syn. Urochloa brizantha (A. Rich.) Stapf]} is the most representative of the cultivated pasture species, grown in about 50 million hectares in the country 8. It was launched by Embrapa in 1984 as an alternative to signal grass (Brachiaria decumbens cv. Basilisk, syn. Urochloa decumbens Stapf R.D. Webster) owing to its higher herbage yield and, mainly because of its resistance to "pasture spittlebugs" such as Notozulia entreriana (Berg, 1879), Deois flavopicta (Stål, 1854) and Deois schach (Fabricius, 1787) (Hemiptera: Cercopidae) 9. However, from the mid-1990s, spittlebugs from the genus Mahanarva have been r...

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“…ex A. Rich Stapf]) [13] Agronomy 2024, 14, 943 2 of 18 monocultivation and high temperatures in the country have led to outbreaks of spittlebugs (Hemiptera: Cercopidae), the main pests in pastures in tropical America [14][15][16][17][18]. Nymphs and adults of this insect pest damage host plants by sucking the sap and injecting toxins that induce phototaxis and reduce photosynthetic rates [19][20][21][22][23], leading to a loss of biomass availability for cattle and reducing the support capacity by 60% on average [15,16,19,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, other strategies to address spittlebug attacks on forages in a sustainable manner are being developed. These include the induction of plant resistance to spittlebug attacks [15,21,29], the use of plant compounds as biocontrol agents [30,31], pasture diversification [15], soil fertilization [21,32] and the use of entomopathogenic fungi [17,22,33].…”

Section: Introductionmentioning

confidence: 99%

Endophytic Capacity of Entomopathogenic Fungi in a Pasture Grass and Their Potential to Control the Spittlebug Mahanarva spectabilis (Hemiptera: Cercopidae)

Campagnani,

Auad,

Maurício

et al. 2024

Agronomy

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Pests in pastures have compromised the production of biomass for feeding livestock herds. Many strategies have been applied to sustainably solve this problem. One viable and innovative technique is the delivery of entomopathogenic fungi through endophytes. Therefore, this study aimed to (i) evaluate the endophytic capacity of two entomopathogenic fungi, Fusarium multiceps UFMGCB 11443 and Metarhizium anisopliae UFMGCB 11444, in Urochloa brizantha [(Hochst. ex A. Rich.) Stapf] (Poaceae) cultivar ‘Marundu’) via foliar inoculation or seed treatment, and (ii) measure their efficiency in controlling Mahanarva spectabilis Distant, 1909 (Hemiptera: Cercopidae) in U. brizantha. In the greenhouse, the fungi colonized the tissues of U. brizantha plants when inoculated via foliar spraying or seed treatment. The fungi F. multiceps and M. anisopliae caused 88% and 97.1% epizootic effects via seed inoculation, respectively, and 100% epizootic effects via foliar inoculation. In the field, the lowest fungal dose of 0.5 kg/ha had the same effect as a fourfold greater dose, with a >86% decrease in insect pest infestation observed. In summary, the fungi F. multiceps and M. anisopliae have endophytic effects and can effectively control M. spectabilis in U. brizantha pastures.

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Survival and injuries of Deois flavopicta (Stal., 1854) in pastures under seed treatment with insecticides and dry mass yield

Cited by 3 publications

References 9 publications

Population dynamics of the pasture leafhopper complex (Hemiptera: Cercopidae) in brachiaria and mombasa grass

Population dynamics of the pasture leafhopper complex (Hemiptera: Cercopidae) in brachiaria and mombasa grass

Spittlebug damage on tropical grass and its impact in pasture-based beef production systems

Endophytic Capacity of Entomopathogenic Fungi in a Pasture Grass and Their Potential to Control the Spittlebug Mahanarva spectabilis (Hemiptera: Cercopidae)

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