Virulência de fungos entomopatogênicos a ninfas de Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae)

Potrich, Michele; Neves, Pedro Manuel Oliveira Janeiro; Alves, Luís Francisco Angeli; Pizzatto, Mariana; Lozano, Everton Ricardi; Luckmann, Daiane; Gouvêa, Alfredo de; Roman, Jéssica Cavalcanti

doi:10.5433/1679-0359.2011v32n4sup1p1783

Cited by 10 publications

(10 citation statements)

References 4 publications

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“…After drying, the bean leaflets containing the whitefly eggs were transferred individually to glass containers (10 ml) and the petioles immersed in agar-water solution (1.5%), in order to maintain the turgidity of the leaf [20]. Control treatment was performed immersing the leaflets in solution of 10 m of distillated water + Tween® 20 (0.05%).…”

Section: Pathogenicity Bioassays With B Tabaci Eggsmentioning

confidence: 99%

Potential of Entomopathogenic Fungi as Biological Control Agents of Whitefly (Bemisia tabaci biotype B) (Genn.) (Hemiptera: Aleyrodidae)

Espinosa

Silva

Duarte

et al. 2019

JEAI

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The efficiency of isolates from entomopathogenic fungus Beauveria bassiana, Lecanicillium muscarium and Metarhizium rileyi in the control of eggs and third-instar nymphs of whitefly, Bemisia tabaci biotype B, was evaluated by pathogenicity and virulence tests, under laboratory conditions. For the pathogenicity tests, five leaflets of bean (Phaseolus vulgaris) plants containing 20 nymphs or 20 eggs of B. tabaci biotype B were used. The leaflets were immersed in suspension containing a concentration of 108 conidia/ml of each fungus isolate. Nymph mortality and egg viability were evaluated after seven days. The isolates that caused nymph mortality and egg viability above 80% were submitted to virulence tests, in order to estimate the lethal concentration (LC50) of each isolate. All isolates were pathogenic to eggs and third-instar nymphs of B. tabaci Biotype B. JAB07 of B. bassiana and LCMAP3790 of L. muscarium isolates presented the best results, with nymphs mortality of 96.68 ± 2.25% and 97.74 ± 1.56%, respectively. Additionally, JAB07 was the most virulent isolate, both for eggs and third-instar nymphs, with LC50 estimated of 0.012 and 0.006 × 103 conidia/ml, respectively. We suggest, future field trials are required in order to analyze the real efficiency of this isolate in the control of eggs and nymphs of B. tabaci biotype B in field conditions.

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Section: Pathogenicity Bioassays With B Tabaci Eggsmentioning

confidence: 99%

Potential of Entomopathogenic Fungi as Biological Control Agents of Whitefly (Bemisia tabaci biotype B) (Genn.) (Hemiptera: Aleyrodidae)

Espinosa

Silva

Duarte

et al. 2019

JEAI

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“…Two B. bassiana isolates were obtained from the collection of entomopathogenic fungal cultures of the Agriculture Biotechnology Laboratory of the State University of West Paran a (Unioeste), Paran a, Brazil. These isolates-Unioeste 47 and Unioeste 57, both originally collected from a pentatomid stinkbug-were chosen because they are pathogenic and virulent against the whitefly B. tabaci, a pest of tomato (Potrich et al, 2011).…”

Section: Preparation Of Monospore Cultures Of Beauveria Bassiana Isolmentioning

confidence: 99%

Interactions between Beauveria bassiana and Trichogramma pretiosum under laboratory conditions

Potrich

Alves

Lozano

et al. 2015

Entomologia Exp Applicata

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Knowledge about interactions among biological control agents, used in sequence or simultaneously, may help to increase their efficiency, or in the case of conservation biological control, to avoid the impairment of efficiency. The aim of this study was to evaluate the interaction between two isolates of Beauveria bassiana (Bals.) Vuill. (Hypocreales) (Unioeste 47 and Unioeste 57) and Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae), varying the timing of sprays of the fungus. Isolates were sprayed at 109 conidia ml−1 upon cards (1 × 5 cm; i.e., 2 × 105 conidia mm−2) with eggs of Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) and the control group was sprayed with sterile distilled water with Tween® 80 (0.01%). First, the percentage of parasitized eggs was assessed in a choice test: females of T. pretiosum were confined with two cards, one of them treated with either of the fungus isolates, the other a water‐treated control. Second, parasitism was compared on cards sprayed at various time intervals pre‐ vs. post‐parasitism: the number of parasitized eggs was assessed, as well as the parasitoid's emergence percentage, egg‐adult period, offspring sex ratio, and the longevity of parasitizing females. Trichogramma pretiosum preferred to parasitize control eggs (65 and 72%) and parasitization of the treated eggs did not differ between fungus isolates: 35% (Unioeste 47) vs. 28% (Unioeste 57). Spraying before or after parasitizing did not affect the number of parasitized eggs, nor offspring sex ratio; however, both treatments affected the percentage of emerged adults, egg‐adult period, and longevity. These findings suggested that isolates did not interfere in the longevity of parasitizing females. When the fungus was sprayed on the various development stages of the parasitoid within the host egg, or when it was offered to the parasitoid at different times after spraying, differences in adults' longevity, parasitism, emergency period from egg to adult, and sex ratio were observed. Beauveria bassiana may be used in conjunction with this parasitoid in a program of pest control.

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“…and Isaria sp. have potential to be used in controlling of this pest, however, this method is not frequently utilized (Potrich et al 2011 Successful management of insect pests involves the efficient sampling of target insects and their natural enemies (Fernandes et al 2003). For this purpose knowledge of insect sampling applied to estimates of population densities assists in decision-making by the producer of whether or not to control the target insect.…”

Section: Introductionmentioning

confidence: 99%

Sequential sampling of Bemisia tuberculata (Bondar, 1923) (Hemiptera: Aleyrodidae) on cassava crop

Silva¹,

Mota²,

Fernandes³

et al. 2014

An. Acad. Bras. Ciênc.

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Estimate efficiently of the whitefly population (Bemisia tuberculata Bondar) in cassava, to assist in decision making of pest control is one of the advantages of sequential sampling plans. Therefore, the objective of this study was to determine a sequential sampling plan according to two methods of pest management, using biological and/or chemical control. Samples were obtained in a commercial field of 2.500,00 m 2 , divided into 100 plots. The visualization method was used for sampling of the upper leaves by counting the number of adults. In total 15 samples were taken weekly from January to April 2012. The spatial distribution model which best fit to the behavior of B. tuberculata adults was the negative binomial distribution. Levels adapted for biological and chemical control were five and twenty adults per plant, respectively. Sampling plans resulted in two decisions for each proposed method. Thus, for population control the upper limit was defined as S 1 = 4.2056 + 2.1540n (biological) and S 1 = 20.219 + 10.4306n (chemical); and the lower limit where the pest control is not recommended was defined by S 0 = -4.2056 + 2.1540n (biological) and S 0 = -20.219 + 10.4306n (chemical). Sequential sampling estimated the maximum number of sample units necessary for decision-making of three samples with 1.34 adults for biological control and 3.85 sample units with 7.39 adult pests for chemical control.

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Virulência de fungos entomopatogênicos a ninfas de Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae)

Abstract: The objective of this study was to evaluate the pathogenicity and virulence of isolates of Beauveria bassiana (Unioeste 47 and Unioeste 57), Metarhizium anisopliae (Unioeste 43 and Esalq 09) and Isaria

Cited by 10 publications

References 4 publications

Potential of Entomopathogenic Fungi as Biological Control Agents of Whitefly (Bemisia tabaci biotype B) (Genn.) (Hemiptera: Aleyrodidae)

Potential of Entomopathogenic Fungi as Biological Control Agents of Whitefly (Bemisia tabaci biotype B) (Genn.) (Hemiptera: Aleyrodidae)

Interactions between Beauveria bassiana and Trichogramma pretiosum under laboratory conditions

Sequential sampling of Bemisia tuberculata (Bondar, 1923) (Hemiptera: Aleyrodidae) on cassava crop

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