Extratos aquosos de Leucaena leucocephala e Sterculia foetida no controle de Bemisia tabaci biótipo B (Hemiptera: Aleyrodidae)

Vasconcelos, Geraldo José Nascimento de; Júnior, M. G. C. Gondim; Barros, Reginaldo

doi:10.1590/s0103-84782006000500002

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…Juss.) oil, tree essential oils, mineral oils and algae extracts have insecticidal, repellent and antifeedant effects and may also act as growth regulators and fertility suppressors of B. tabaci (Acosta et al, 2006;Cavalcante et al, 2006;Vasconcelos et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean

Pinheiro

Quintela

Oliveira

et al. 2009

Pesq. agropec. bras.

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-The objective of this work was to determine the most susceptible nymphal stage of Bemisia tabaci biotype B to neem (Azadirachta indica A. Juss.) oil applied to dry bean (Phaseolus vulgaris L.) in a screenhouse. A solution of commercial oil (Dalneem) extracted from neem seeds was sprayed directly on each nymphal instar at 0, 0.1, 0.25, 0.5, 1 and 2% concentrations for lethal concentration (LC) determination, and at 0, 0.5 and 1% concentrations for lethal time (LT) determination. The number of living and dead nymphs was recorded fi ve days after spraying for LC determination, and daily during six days for LT determination. The LC 50 estimated for fourth instar nymphs occurred at 0.56% concentration. For all instars, LC 50 and LC 95 were estimated at 0.32 and 2.78% concentrations, respectively. The estimated values of LT 50 at 1% concentration were 2.46, 4.45, 3.02 and 6.98 days for the fi rst to fourth instars, respectively. The LT 50 occurred at fi ve days for 0.5% and at four days for 1% concentration in all instars. A mortality rate of over 80% was observed on the 6 th day for the fi rst to third instars at 1% concentration. The fi rst three nymphal stages were more susceptible to neem oil when compared to the fourth nymphal stage.

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Section: Introductionmentioning

confidence: 99%

Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean

Pinheiro

Quintela

Oliveira

et al. 2009

Pesq. agropec. bras.

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“…Within the IPM, the use of plant extracts is an old practice and becomes an important control strategy. The extracts are obtained from renewable resources, and they have favorable toxicological properties, cause less effect on non-target organisms, rapid degradation in the soil, not accumulating in the environment, besides offering greater safety for the consumer (VASCONCELOS; GODIM; BARROS, 2006).…”

Section: Introductionmentioning

confidence: 99%

Ginger extract as an alternative to thrips (Thrips tabaci) control in hydroponic lettuce

Silva

Gouvêia

Silva

et al. 2021

R. Agrogeoambiental

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Ginger has a large number of essential oils, zingiberene is the major substance found in it, which may be linked to the insecticidal activity of the plant. Therefore, it can be a viable alternative to replace the use of pesticides for pest control. The objective of this work was to evaluate the use of this ginger-based extract in hydroponic lettuce as an alternative to thrips control. The experiment was carried out in a randomized block design, with five treatments and four replications. The treatments used were the concentrations of 0 %, 20 %, 40 %, 60 %, and 80 % weight/volume of aqueous extract. After 45 days of sowing, the ginger plant extract was applied to the lettuce plants every seven days. A population of thrips was monitored using adhesive traps attached above each experimental plot once a week until harvest. In addition, fresh mass weight, shoot height, and incidence of direct damage to the crop were evaluated. Regarding thrips monitoring, no differences wereobserved indicating the uniformity of the population level among the lettuce parcels. For the evaluation of weight and fresh mass, no differences were observed regarding the treatments. However, from the concentration of 60 %, it was observed the lowest averages of plants with direct damage, showing that the higher the concentration of the solution the lesser insect feeding. Accordingly, the use of ginger plant extract in hydroponic lettuce becomes a promising alternative for reducing thrips feeding on lettuce.

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“…These compounds may be involved in the normal development of plants or act exclusively in an insecticidal protection system (Ibanez et al, 2012). Natural chemical compounds are generally considered less harmful to human health and the environment and have less adverse effects caused by the uncontrolled application of agrochemicals (Vasconcelos et al, 2006). Many proteins have been tested for their repellent, deterrent, or lethal effects against insect pests (Carlini and Grossi-De-Sá, 2002;Vandenborre et al, 2011;Ibanez et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Peptide composition, oxidative and insecticidal activities of nectar from flowers of Spathodea campanulata P. Beauv

Santos

Minatel

Reco

et al. 2017

Industrial Crops and Products

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The growing demand for food has intensified the search for compounds of plant origin to protect field crops from predators and pathogens, as these compounds have less environmental impact and are considered healthier than synthetic compounds. Among plant species with insecticidal activity, Spathodea campanulata has been identified as a potential source of insecticidal compounds. Therefore, in this study we verified the insecticidal effect of nectar from S. campanulata against three different insects. In addition, the oxidant activity of nectar and proteomic assay were conducted to identify the insecticide potential. Both gross and dialyzate nectar showed a promising toxic effect against Euschistus heros (Fabr.), Helicoverpa zea (Boddie) and Anticarsia gemmatalis (Hübner) insects. According to oxidant tests, non-denatured nectar showed a higher oxidant activity than denatured nectar, in both albumin degradation and TBARS tests. SDS-PAGE and 2D-PAGE were used to characterize the nectar proteins, revealing 13 spots that were compatible to either proteins or peptides. The most relevant spots were analyzed by mass spectrometry, confirming the presence of proteins associated with insecticidal activity. In conclusion, it is hypothesized that S. campanulata nectar has insecticidal effects and this activity is linked to the classes of pro-oxidant proteins or peptides present in its chemical composition.

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Extratos aquosos de Leucaena leucocephala e Sterculia foetida no controle de Bemisia tabaci biótipo B (Hemiptera: Aleyrodidae)

Abstract: RESUMO A presente pesquisa foi desenvolvida na Cidade de Recife-PE, com o objetivo de avaliar a ação inseticida, insetistática e repelente de extratos aquosos de duas essências florestais sobre ovos, ninfas e adultos de

Cited by 10 publications

References 13 publications

Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean

Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean

Ginger extract as an alternative to thrips (Thrips tabaci) control in hydroponic lettuce

Peptide composition, oxidative and insecticidal activities of nectar from flowers of Spathodea campanulata P. Beauv

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