Acute toxicity and duration of harmful activity of nine insecticides on Trichogramma pretiosum, a parasitoid used in augmented biological control of Helicoverpa spp. in Brazilian soybean fields

The objective of this work was to evaluate the parasitism capacity of Trichogramma pretiosum Riley and T. acacioi Brun, Moraes and Soares (Hymenoptera: Trichogrammatidae) in eggs of the alternative host Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) aiming to use both species in biological control programs of Nipteria panacea Tierry-Mieg (Lepidoptera: Geometridae). The parasitism rhythm and total parasitism of these parasitoid species were affected by the temperature with higher values during the first 24 h of their life. Parasitism period was longer for T. pretiosum and T. acacioi at the lowest temperature.

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Acute toxicity of mosquito pesticides on weed biological control agents in south Florida, USA

Biocontrol Science and Technology ◽

10.1080/09583157.2020.1768220 ◽

2020 ◽

Vol 30 (8) ◽

pp. 855-861 ◽

Cited By ~ 1

Author(s):

Gregory S. Wheeler ◽

Ellen C. Lake ◽

Min B. Rayamajhi ◽

Melissa C. Smith

Keyword(s):

Biological Control ◽

Acute Toxicity ◽

South Florida ◽

Biological Control Agents ◽

Weed Biological Control

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Selectivity of Insecticides Against Adult Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) on Cassava

Journal of Agricultural Science ◽

10.5539/jas.v11n1p546 ◽

2018 ◽

Vol 11 (1) ◽

pp. 546

Author(s):

Elidiane Feltrin-Campos ◽

Rudiney Rigenberg ◽

Geraldo Andrade Carvalho ◽

Daniele Fabiana Glaeser ◽

Harley Nonato de Oliveira

Keyword(s):

Biological Control ◽

Treatment Group ◽

Bacillus Thuringiensis ◽

Mortality Rates ◽

International Organization ◽

Field Conditions ◽

Trichogramma Pretiosum ◽

Parasitoid Species ◽

Future Studies ◽

F1 Generation

In this study, the effects of various chemical and biological insecticides on adults of the parasitoid species Trichogramma pretiosum (Riley) were examined in cassava. The chemical insecticides zeta-cypermethrin, lufenuron + profenofós, imidacloprid, thiamethoxam, and teflubenzuron and the biological agents Bacillus thuringiensis and Baculovirus erinnyis were evaluated. For each treatment group, the effects were evaluated using T. pretiosum mortality rates, longevity of females, the number of eggs parasitized by the F0 generation, and number of emergent F1 parasitoids. The insecticides were classified using the International Organization for Biological Control categories. The tested insecticides had little effect on longevity and survival of adults, but all affected parasitism (F0) and were moderately harmful to the parasitoid. In relation to the emergent (F1) generation, the pesticides were either harmless or slightly harmful, except for zeta-cypermethrin which was classified as harmful with a 100% reduction in parasitoid emergence. The results indicate that the tested insecticides were moderately harmful to T. pretiosum in the laboratory; future studies will examine the effects of the insecticides under semi-field and field conditions to confirm their toxicity.

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Biological control with Trichogramma pretiosum increases organic maize productivity by 19.4%

Agronomy for Sustainable Development ◽

10.1007/s13593-015-0312-3 ◽

2015 ◽

Vol 35 (3) ◽

pp. 1175-1183 ◽

Cited By ~ 15

Author(s):

Maria de Lourdes Corrêa Figueiredo ◽

Ivan Cruz ◽

Rafael Braga da Silva ◽

John Edward Foster

Keyword(s):

Biological Control ◽

Trichogramma Pretiosum ◽

Maize Productivity

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Adult feeding and mating effects on the biological potential and parasitism of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae)

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132009000500001 ◽

2009 ◽

Vol 52 (5) ◽

pp. 1057-1062 ◽

Cited By ~ 7

Author(s):

Dirceu Pratissoli ◽

Harley Nonato de Oliveira ◽

Ricardo Antonio Polanczyk ◽

Anderson Mathias Holtz ◽

Regiane Cristina Oliveira de Freitas Bueno ◽

...

Keyword(s):

Biological Control ◽

Egg Viability ◽

Trichogramma Pretiosum ◽

Control Programs ◽

Trichogramma Species ◽

Biological Potential ◽

Adult Feeding

This work was carried out to study the effects of adult feeding and mating on the biological potential and parasitism of Trichogramma pretiosum and T. acacioi (Hymenoptera: Trichogrammatidae) to improve their use in biological control programs. Both species presented higher parasitism and longevity whenever adults were fed. Fed and unmated T. pretiosum females led to low parasitism whereas T. acacioi females did not present parasitism whatsoever. Egg viability of T. pretiosum was similar for fed and mated individuals, but T acacioi showed lower values for this parameter when unfed and without mating. Unmated females produced only males while mated ones had more than 60% female descendents for both Trichogramma species. Therefore, mated and fed female parasitoids should be released in crop systems to increase the biological control.

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Trichogramma pretiosum parasitism and dispersal capacity: a basis for developing biological control programs for soybean caterpillars

Bulletin of Entomological Research ◽

10.1017/s0007485311000289 ◽

2011 ◽

Vol 102 (1) ◽

pp. 1-8 ◽

Cited By ~ 21

Author(s):

R.C.O. de Freitas Bueno ◽

J.R.P. Parra ◽

A. de Freitas Bueno

Keyword(s):

Biological Control ◽

Control Program ◽

Egg Parasitoid ◽

Anticarsia Gemmatalis ◽

Trichogramma Pretiosum ◽

Parasitoid Species ◽

Dispersal Capacity ◽

Quadratic Effect ◽

Control Programs ◽

The Mean

AbstractIn order to succeed in biological control programs, not only is it crucial to understand the number of natural enemies to be released but also on how many sites per area this releasing must be performed. These variables might differ deeply among egg parasitoid species and crops worked. Therefore, these trials were carried out to evaluate the parasitism (%) in eggs of Anticarsia gemmatalis and Pseudoplusia includens after the release of different densities of the egg parasitoid Trichogramma pretiosum. Field dispersal was also studied, in order to determine appropriate recommendations for the release of this parasitoid in soybean fields. The regression analysis between parasitism (%) and densities of the parasitoid indicated a quadratic effect for both A. gemmatalis and P. includens. The maximum parasitism within 24 h after the release was reached with densities of 25.6 and 51.2 parasitoids per host egg, respectively, for the two pests. Parasitism of T. pretiosum in eggs of P. includens decreased linearly as the distance of the pest eggs from the parasitoid release sites increased. For P. includens, the mean radius of T. pretiosum action and the area of parasitoid dispersal in the soybean crop were 8.01 m and 85.18 m2, respectively. We conclude that for a successful biological control program of lepidopteran pests using T. pretiosum in soybean fields, a density of 25.6 parasitoids per host egg, divided into 117 sites per hectare, should be used.

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Fertility life table of Trichogramma pretiosum and Trichogramma acacioi on eggs of Anagasta kuehniella at different temperatures

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2004000200014 ◽

2004 ◽

Vol 39 (2) ◽

pp. 193-196 ◽

Cited By ~ 15

Author(s):

Dirceu Pratissoli ◽

José Cola Zanuncio ◽

Ulysses Rodrigues Vianna ◽

Josimar de Souza Andrade ◽

Edylene Marota Guimarães ◽

...

Keyword(s):

Biological Control ◽

Life Table ◽

Reproductive Potential ◽

The State ◽

Trichogramma Pretiosum ◽

Espírito Santo ◽

Control Programs ◽

Anagasta Kuehniella ◽

Different Temperatures ◽

Espirito Santo

Species of the Trichogramma genus are among the most important ones for biological control. The objective of this research was to evaluate parasitism potential of two species of Trichogramma on eggs of Anagasta kuheniella through life fertility table, at temperatures between 15ºC and 35ºC. These species were collected in the State of Espírito Santo parasitising eggs of the avocado defoliator Nipteria panacea. Trichogramma pretiosum and T. acacioi showed adequate reproductive potential between 15ºC and 35ºC which indicates possibilities of using them in biological control programs in avocado plantations.

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Análise Econômica da Produção de Trichogramma pretiosum Riley em Diferentes Escalas

EntomoBrasilis ◽

10.12741/ebrasilis.v7i1.379 ◽

2014 ◽

Vol 7 (1) ◽

pp. 41-47 ◽

Cited By ~ 1

Author(s):

Alfredo de Gouvea ◽

Valdemir José Gnoatto ◽

Everton Ricardi Lozano Silva ◽

Michele Potrich

Keyword(s):

Biological Control ◽

Economic Analysis ◽

Economic Performance ◽

Economic Feasibility ◽

Production Costs ◽

Trichogramma Pretiosum ◽

Local Markets ◽

Technology System ◽

Internal Rate

O presente trabalho teve como objetivo analisar a viabilidade econômica da produção de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) nas escalas de produção de 4.500 (A), 9.000 (B) e 13.500 (C) cartelas com 100.000 ovos por ano. Foram utilizados como critérios o valor presente líquido (VPL) e taxa interna de retorno (TIR). Os dados de custo de produção de cada sistema tecnológico foram levantados junto ao comércio local de Dois Vizinhos-PR, à empresas especializadas e laboratórios de controle biológico da Universidade Tecnológica Federal do Paraná - Campus de Dois Vizinhos e da Universidade Estadual Oeste do Paraná – Campus de Marechal Cândido Rondon, entre julho e dezembro de 2011. Os fatores que mais influenciaram nos custos de produção foram os insumos e a mão-de-obra utilizada. A análise de viabilidade econômica apresentou os respectivos valores de VPL e TIR para as escalas A, B e C: R$ 279.662,13 e 50,04%; R$ 919.566,09 e 130,39%; e R$ 1.544.602,37 e 164,76%. As três escalas de produção são viáveis economicamente, sendo que a escala C apresentou o melhor desempenho econômico. Economic Analysis of Trichogramma pretiosum Riley Production at Different Scales Abstract. The present study aimed to assess the economic feasibility of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) production on the scales production of 4,500, 9,000 and 13,500 cards with 100,000 eggs per year. The criteria of present liquid value (PLV) and internal rate return (IRR) were used. Data from costs production of each technology system were surveyed in the local markets in Dois Vizinhos, specialized companies and biological control laboratories from Universidade Tecnológica do Paraná – Campus Dois Vizinhos, and from Universidade Estadual do Oeste do Paraná – Campus Marechal Candido Rondon, between July and December 2011. The factors which most affected the production costs were the inputs and labor. The economic feasibility provided the following values for PLV and IRR for the scales A, B and C: R$ 279,662.13 and 50.04%; R$ 919,566.09 and 130.39%; R$ 1,544,602.37 and 164.76%. The three productions scales are economically feasible, and scale C had the best economic performance.

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Biological characteristics of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lep.: Geometridae), on eggs of Anagasta kuehniella (Lep.: Pyralidae)

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132005000100002 ◽

2005 ◽

Vol 48 (1) ◽

pp. 7-13 ◽

Cited By ~ 13

Author(s):

Dirceu Pratissoli ◽

José Cola Zanuncio ◽

Ulysses Rodrigues Vianna ◽

Josimar Souza Andrade ◽

Luiz Carlos Marozzi Zanotti ◽

...

Keyword(s):

Biological Control ◽

Development Rate ◽

Quadratic Model ◽

Extreme Temperatures ◽

Alternative Host ◽

Trichogramma Pretiosum ◽

Anagasta Kuehniella ◽

Cubic Model ◽

Lepidoptera Pyralidae ◽

Number Of Individuals

The objective of this investigation was to study Trichogramma pretiosum and T. acacioi (Hymenoptera: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lepidoptera: Geometridae) on the eggs of the alternative host Anagasta kuehniella (Lepidoptera: Pyralidae) aiming to use them for biological control of this pest in avocado orchards. The cubic model presented better adjustment for duration of the life cycle of T. pretiosum and T. acacioi with the host A. kuehniella which shows that development rate of these species increases with temperature within the range tested. The number of individuals of both Trichogramma species emerged per egg from this host was higher than one. The quadratic model was significant for viability of T. pretiosum and T. acacioi. This parameter was more affected by extreme temperatures and higher emergence rates of adults of both parasitoids species occurred at temperatures of 20, 25 and 30°C.

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