Inseticidas para controle da traça-das-crucíferas: como os agricultores os utilizam no Distrito Federal?

Branco, Marina Castelo; Amaral, Pablo S.T.

doi:10.1590/s0102-05362002000300002

Cited by 4 publications

(3 citation statements)

References 9 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As observed by Xia et al (2014) in China, with the report of three or even four insecticide applications per week against P. xylostella, similar practices have been described in some Brazilian Brassica plantations of the Federal District and in Pernambuco State AMARAL, 2002). Several areas of production have been also abandoned due to the control failure and inefficiency of insecticides leading farmers to use (without success) up to 4 applications per week (OLIVEIRA et al, 2011;LIMA NETO et al, 2016).…”

Section: Introductionmentioning

confidence: 59%

High resistance levels in brazilian Plutella xylostella populations: needs for adjustments in field concentration

et al. 2023

View full text Add to dashboard Cite

Plutella xylostella cause severe damage on cruciferous plants all over the world. Farmers in several regions of Brazil report increasing inefficiency of chemical control, even when using high insecticide concentrations. We evaluate here the susceptibility of brazilian diamondback moth populations to the Premio® (Chlorantraniliprole), Dipel® (Bacillus thuringiensis var. kurstaki) and Lannate® BR (Oxime Methylcarbamate) insecticides, frequently used in Brazil. Susceptibility bioassays with five field-collected and two laboratory diamondback moth populations were conducted with increasing concentrations of insecticides up to ten times above the recommended concentration. Extremely high and region-dependent resistances were found in field populations against Chlorantraniliprole and B. thuringiensis, with Resistance Ratios up to 370.0 times for the Camocim de São Felix population. For Oxime Methylcarbamate, we were not able to do Probit analyses for the field populations because of very low mortality rates. Laboratory populations showed resistance to the three tested insecticides with all LC50 concentrations exceeding the recommended doses by at least 3 times. Our results show strong and variable resistance to the three tested insecticides according to the region of origin. To maintain efficient pest control in a large country like Brazil, local levels of resistance need therefore to be monitored by the authorities and reassessment and adjustments of regional doses of insecticides should be implemented as a public policy, to prevent massive spread of insecticides in the field, as well as increases in cases of resistance.

show abstract

Section: Introductionmentioning

confidence: 59%

High resistance levels in brazilian Plutella xylostella populations: needs for adjustments in field concentration

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The flubendiamide treatment isolated throughout the experiment was highlighted in the control of A. gemmatalis in comparison to the chlorantraniliprole and the combination between both ( Table 3). The chemical management for the adequate control of insects should include the technique of rotation of insecticides with different modes of action to avoid the emergence of resistant populations and to increase the useful life of the product (Castelo-Branco & Amaral, 2002;Roditakis et al, 2015;Gonçalves et al, 2016). It should be noted that in the southern region of Rio Grande do Sul, the active chlorantraniliprole is used in the crops such as rice, soybean and corn to the control of Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae), A. gemmatalis, C. includens, H. armigera and Helicoverpa zea (Boddie, 1850) (Lepidoptera: Noctuidae) (Agrofit, 2018).…”

Section: Resultsmentioning

confidence: 99%

Insecticides Management Used in Soybean for the Control of Anticarsia gemmatalis (Hübner, 1818) (Lepidoptera: Eribidae)

Fernandes¹,

Abreu²,

Christ³

et al. 2018

JAS

View full text Add to dashboard Cite

The soybean is the main agricultural product produced in Brazil. Among the States, Rio Grande do Sul was the third largest producer in the 2017/2018 harvest. However, insects interfere on the productivity and provide an increase in the cost of production. The velvetbean caterpillar, Anticarsia gemmatalis (Hübner, 1818) (Lepidoptera: Eribidae) is considered one of the main leaf stripper caterpillars. The occurrence can completely fade, reflected in the grain yield. The chemical method is the main control adopted, however, due to the inadequate management of the crop, failures are observed frequently on the field. In this context, the insecticide management is considered an alternative, still little adopted, due to a lack of knowledge between the movement action and the susceptibility of the insect. Therefore, the objective was to evaluate the performance of insecticides used in the soybean crop for the control of A. gemmatalis under laboratory conditions. In the residual and direct contact bioassays, eight treatments with five replicates were used in a completely randomized design, with 2nd and 5th instar caterpillars of A. gemmatalis. The results showed that by residual contact during 24 hours, all the treatments with exception of the control had effectiveness in both instar mortality. The treatments flubendiamide + zeta-cypermethrin and zeta-cypermethrin after four hours application reached 100% of effectiveness. Thus, aiming an integrated pest management program, where it advocated the association of different control tactics, the insecticide management with flubendiamide + zeta-cypermethrin were effective with 100% of control efficiency in both instars.

show abstract

“…The diamondback moth Plutella xylostella L. (Lepidoptera: Plutellidae) is a cosmopolitan pest which causes severe damage to Brassica crops, e.g. in Brazil (França and Medeiros 1998;Castelo Branco and Amaral 2002), and in other countries (Talekar and Shelton 1993;Godin and Boivin 1998). The total annual expenses of worldwide management of P. xylostella has been estimated at approximately $4 billion (Zalucki et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Journal of Plant Protection Research

Bacci¹,

Rosado²,

Picanço³

et al. 2018

View full text Add to dashboard Cite

Control failure of pests and selectivity of insecticides to beneficial arthropods are key data for the implementation of Integrated Pest Management (IPM) programs. Therefore, the aim of this study was to assess the control failure likelihood of Plutella xylostella and the physiological selectivity active ingredients to parasitoid Oomyzus sokolowskii (Hymenoptera: Eulophidae) and to predators Polybia scutellaris (Hymenoptera: Vespidae) and Lasiochilus sp. (Hemiptera: Anthocoridae). In bioassays, P. xylostella larvae and O. sokolowskii, P. scutellaris and Lasiochilus sp. adults were used. Concentration-mortality curves of six insecticides for P. xylostella were established. These curves were used to estimate the mortality of P. xylostella at the recommended concentration, in order to check a control failure of insecticides to this pest. Furthermore, the lethal concentration for 90% of populations (LC 90 ) and the half of LC 90 were used in bioassays with the natural enemies to determine the selectivity of these insects to insecticides. All tested insecticides showed control failure to P. xylostella, indicated by high LC 90 and low estimated mortalities (less than 80%). The cartap insecticide was selective in half of LC 90 to Lasiochilus sp. and moderately selective in LC 90 and the half of LC 90 , to Lasiochilus sp. and P. scutellaris, respectively. Deltamethrin was moderately selective in the half of LC 90 to predator Lasiochilus sp. Cartap, carbaryl, and deltamethrin reduced the mortality of Lasiochilus sp. in the half LC 90 . The results also showed that the insecticides methamidophos, carbaryl, parathion methyl and permethrin were not selective to any of the tested natural enemies. The role of insecticides in IPM systems of Brassica crops is discussed based on their control failures to P. xylostella and selectivity to their natural enemies.

show abstract

Inseticidas para controle da traça-das-crucíferas: como os agricultores os utilizam no Distrito Federal?

Cited by 4 publications

References 9 publications

High resistance levels in brazilian Plutella xylostella populations: needs for adjustments in field concentration

High resistance levels in brazilian Plutella xylostella populations: needs for adjustments in field concentration

Insecticides Management Used in Soybean for the Control of Anticarsia gemmatalis (Hübner, 1818) (Lepidoptera: Eribidae)

Journal of Plant Protection Research

Contact Info

Product

Resources

About