lonias se agruparon por especies, Trichogramma pretiosum o fuentesi. con las avispas silvestres, tienen un rendimiento bajo en el campo. develop the parasitic wasp, Trichogramma minutum, for control of the eastern stituciones canadienses y el USDA para desarrollar una avispa, Trichogramma. [Trichogramma wasps: biological control of wax moths] []. Solís Merino, A. Romo, A. Ordóñez Maldonado, A. Gómez Pajuelo, A. Access the full text.

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Toxicity risk of insecticides to the insect egg parasitoid Trichogramma evanescens Westwood Hymenoptera: Natural populations of Trichogramma evanescens contribute to the control of lepidopterous acispa.

trichogramma evanescens hymenoptera: Topics by

The toxic effects of insecticides have been extensively reported on trichogrammatids, but are largely unknown on T. In this study, the toxicities of seven classes of chemicals against the parasitoid were investigated.

Among these classes, organophosphates and carbamates exhibited the highest levels of intrinsic toxicity, with LC50 values ranging from 0.

Among the phenylpyrazoles, only ethiprole can be considered to be less toxic in the group.

Avermectins, pyrethroids and neonicotinoids were less toxic, with LC50 values ranging from 1. In contrast, insect growth regulators IGRs showed the lowest toxicity to the parasitoid, with LC50 values ranging from to mg AI L The results of risk quotient analysis indicated that neonicotinoids, avermectins, pyrethroids and IGRs were less hazardous, but phenylpyrazoles except for ethiproleorganophosphates and carbamates were slightly to moderately or dangerously toxic to T.

The present results provide informative data for implementing biological and chemical control strategies in integrated pest management of lepidopterans. Interrelation between irradiation and parasitism by trichogramma evanescens Westw. The present work deals with the effect of gamma radiation treatments on the relationship between the egg parasitoid, T. The obtained results could be summarized as follows: I- Effect of gamma radiation on the egg mortality percent of c.

II- Effect of irradiated host on the biology of the parasitoidT. III-Direct effect of gamma irradiation on the different developmental stages of T. Las especies de Trichogramma de Uruguay Hymenoptera: Trichogrammatidae Trichogramma species from Uruguay Hymenoptera: Directory of Open Access Journals Sweden.

Otras dos especies T. Se provee una clave ilustrada para determinar esas cinco especies.

Five Trichogramma Westwood species were collected in Uruguay. The widely distributed T. The two species T. Their morphology is relatively close and, from the information available, it is not possible to decide if they are closely related species or synonymous species. Finally, up to now, T. An illustrated key is provided to identify these five species.

Trichogrmama, the present and expected use of Trichogramma to control different pests in different Uruguayan crops is reviewed. Extensive gene rearrangements in the mitochondrial genomes of two egg parasitoids, Trichogramma japonicum and Trichogramma ostriniae Hymenoptera: Animal mitochondrial genomes trichogeamma exhibit conserved gene arrangement avixpa major lineages, while those in the Hymenoptera are known to possess frequent rearrangements, as are those of several other orders of insects.

Here, we sequenced two complete mitochondrial genomes of Trichogramma japonicum and Trichogramma ostriniae Hymenoptera: In total, 37 mitochondrial genes were identified in both species. The same gene arrangement pattern was found in the two species, with extensive gene rearrangement compared with the ancestral insect mitochondrial genome. Most tRNA genes and all protein-coding genes were encoded on the minority strand. In total, 15 tRNA genes and seven protein-coding genes were rearranged.


The rearrangements of cox1 and nad2 as well as avisp tRNA genes were novel.

CREx analysis revealed eight rearrangement operations occurred from presumed ancestral gene order of Chalcidoidea to form the derived gene order of Trichogramma. Our study shows that gene rearrangement information in Chalcidoidea can potentially contribute to the phylogeny of Chalcidoidea when more mitochondrial genome sequences are available. Study of the biology of Trichogramma chilonis Ishii Hymenoptera In the trichogramms test, parasitism in eggs of H.

Trichogramma chilonis, Maruca vitrata, biology, Plutella xylostella Effect of host and food availability on the biological characteristics of Trichogramma galloi Zucchi HymenopteraTrichogrammatidae. Pratissoli, Dirceu; Oliveira, Harley N.

Biological characteristics of Trichogramma galloi Zucchi, were evaluated in laboratory where these parasitoids were reared on eggs of Diatraea saccharalis Lepidoptera, Pyralidae with or without honey, and exposed to eggs of the host after 0, 6, 12, 24, 36, 48, 60, 72 and 84 hours of emergence. The parasitism rate and viability showed higher for individuals that received food. The sex ratio was not influenced by food.

The number of individuals per egg only showed difference for those adults that did not receive food and stayed six hours without the host eggs. Checking the effect of the availability of eggs, only the sex ratio, with or without honey, did not show differences.

Tricbogramma results show that T. Mass release of Aviwpa evanescens and T. Pheromone disruption was used in both orchards, making the study one of the first to evaluate Trichogramma release under Insecticide toxicity to Trichogramma pretiosum Hymenoptera: Trichogrammatidae females and effect on descendant generation.

[Trichogramma wasps: biological control of wax moths] [2010]

The effect of nine insecticides used in tomato production was evaluated on adults of two Trichogramma pretiosum Riley Hymenoptera: Eggs of Anagasta kuehniella Lepidoptera: Pyralidaepreviously immersed in insecticides solutions were offered to females of both T. Effect of host and food availability on the biological characteristics of Trichogramma galloi Zucchi HymenopteraTrichogrammatidae ; Efeito da disponibilidade de hospedeiro e de alimento nas caracteristicas biologicas de Trichogramma galloi Zucchi HymenopteraTrichogrammatidae.

Centro de Ciencias Agrarias], e-mail: Acceptability and suitability of Tuta absoluta eggs from irradiated parents to parasitism by Trichogramma nerudai and Trichogramma pretiosum Hymenoptera: Tuta absoluta Meyrick Lepidoptera: Gelechiidae is one of the most devastating pests of tomato crops.

We studied the acceptability and suitability of eggs laid by irradiated T. Trichogramma absoluta pupae were irradiated with Xradiation R and the emerged adults were separated into couples according to the crosses: In a no-choice experiment, 40 eggs from each cross were exposed to a female parasitoid for 24 h.

However, eggs from irradiated females were significantly less parasitized than those from untreated females. Trichogramma pretiosum showed low parasitism on eggs from all crosses.

In a choice experiment, both T. These results indicate that eggs laid by irradiated parents were acceptable for oviposition and suitable for the development of these parasitoids, and also support the idea that the inherited sterility technique could be used in an integrated approach with egg parasitoids to control T.


Seletividade de herbicidas registrados para a cultura do milho a adultos de Trichogramma pretiosum Hymenoptera: Trichogrammatidae Selectivity of herbicides registered on corn aivspa Trichogramma pretiosum Hymenoptera: The selectivity of 24 herbicides registered on corn to Trichogramma pretiosum Hymenoptera: The adult parasitoids were submitted to a dry film of the herbicides applied on glass plates and the parasitism capacity of the females was evaluated.

Reduced parasitism capacity in the treatments was compared with the negative control distilled water and used to classify the herbicides into four categories: Toxicity of some insecticides used in maize crop on Trichogramma pretiosum HymenopteraTrichogrammatidae immature stages.

Pequeña avispa parasitoide.(Trichogramma sp.) | Uno de los i… | Flickr

Noctuidae is an important pest of maize Zea mays L. Trichogrammatidae immature stages were evaluated. Eggs of Anagasta kuehniella Zeller, Lepidoptera: Pyralidae, containing immature stages of the parasitoid were dipped in water solution pesticides, to evaluate their effects on emergence and sex ratio of F1 parasitoids.

For F2 parasitoids, emergence, parasitism capacity, and sex ratio were evaluated. Beta-cypermethrin, chlorfenapyr, chlorpyrifos, and spinosad affected the emergence success of F1 T. Beta-cypermethrin affected the sex ratio of F1 T. Chlorpyrifos also affected the sex ratio of F2 parasitoids, but only when applied during the egg-larval period, whereas chlorfenapyr reduced this trait when applied during the pre-pupal phase.

Considering the overall effects, only etofenprox and triflumuron were selective on T. Further studies need to be carried out to verify the toxicity of the other pesticides under semi-field and field conditions. Acute toxicities and sublethal effects of some conventional insecticides on Trichogramma chilonis Hymenoptera: The acute toxicity of 10 conventional insecticides to adult of Trichogramma chilonis Ishii Hymenoptera: Trichogrammatidae was bioassayed by membrane method, and then their sublethal effects on the parasitoid were evaluated in the laboratory.

Based on sublethal concentration LC30 values at 8 h after treatment, we determined that adult T. The field-recommended concentrations of chlorfluazuron, indoxacarb, Bacillus thuringiensis, and tebufenozide caused Cartap and spinosad also reduced longevity 8 and 7. In contrast, chlorfluazuron and tebufenozide increased longevity Although chlorfenapyr showed no adverse influence on longevity and fecundity, it remarkably reduced the female percentage of F1 offspring Based on these results, we consider B.

However, fipronil, chlorfenapyr, spinosad, and avermectins were very harmful to T. Timing of application of these insecticides was critical. Using Trichogramma Westwood Hymenoptera: Trichogrammatidae for insect pest biological control in cotton crops: Trichogramma Westwood egg parasitoids alone generally fail to suppress heliothine pests when released in established cotton growing regions.

Factors hindering their success include indiscriminate use of detrimental insecticides, compensation for minimal pest larval hatch due to their activity via re Biological parameters of trichogramma chilonis ishii trichogrammatidae: