Thermal requirements of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lep.: Geometridae), in eggs of two alternative hosts

Pratissoli, Dirceu; Zanúncio, José Cola; Vianna, Ulysses Rodrigues; Andrade, Josimar Souza; Pinon, Tobias Baruc Moreira; Andrade, Gilberto Santos

doi:10.1590/s1516-89132005000500003

Cited by 22 publications

(16 citation statements)

References 13 publications

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“…2). Longer longevity of T. pretiosum (22 days) and T. acacioi (8 days) at temperature similar to their thermal inferior limits confirmed the reports of these species being collected at altitudes near 1.000 m. However, T. pretiosum presented an inverse relationship between longevity and temperature increase which indicated that the effect of this parameter varied with Trichogramma species (Maceda et al 2003;Pratissoli et al, 2004b;Pratissoli et al, 2005b). Parasitism potential of T. pretiosum was also found to be directly related to the lineage of this parasitoid and to the host and weather conditions (Inoue and Parra, 1998;Faria et al, 2000;Pratissoli and Parra, 2000;2001;Pratissoli et al, 2004b Means followed by the same letter, in each column, do not differ between themselves by the test of Tukey at 5% probability level.…”

Section: Resultssupporting

confidence: 55%

Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)

Pratissoli

Zanúncio

Vianna

et al. 2008

Braz. arch. biol. technol.

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Section: Resultssupporting

confidence: 55%

Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)

Pratissoli

Zanúncio

Vianna

et al. 2008

Braz. arch. biol. technol.

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“…Biological control is a key component of integrated pest management programs as an alternative to pesticides, but knowledge on interactions between natural enemies, hosts and abiotic factors is required to optimally select biological control agents (Pratissoli et al 2005Desneux et al 2010;Ragsdale et al 2011). Natural parasitism of lepidopteran pests by Trichogramma (Hymenoptera: Trichogrammatidae) in Brazilian cotton fields suggested the possibility to use these parasitoids as biological control agents against H. virescens in cotton.…”

Section: Introductionmentioning

confidence: 99%

“…Trichogramma spp. are successfully used in biological control of various lepidopteran agricultural pests (Smith 1996;Pratissoli et al 2005;Desneux et al 2010;Suckling and Brockerhoff 2010). Trichogramma spp.…”

Section: Introductionmentioning

confidence: 99%

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

et al. 2011

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Trichogramma spp. are major parasitoids of lepidopteran pest eggs, but there is large variation in efficacy toward a given pest among the numerous described Trichogramma species. It is important to select the Trichogramma species that most effectively parasitize and develop in target pest eggs for biological control. In this context, Trichogramma pretiosum, T. exiguum, T. atopovirilia and T. acacioi were studied in Heliothis virescens eggs under different thermal conditions. The parasitoids were reared at constant temperatures of 20, 25 and 30°C and tested at these respective temperatures, while parasitoids reared at 25°C were also tested at 20 and 30°C, for a total of 20 species-temperature combinations. About 30 H. virescens eggs were offered to the parasitoids for 24 h. Among the four species, parasitism rate by T. atopovirilia was highest at all temperature conditions, whereas T. acacioi had the lowest rates of parasitism at 25°C and 25/30°C. Parasitism ranged from 13.8 to 43.8% among all species-temperature combinations. Viability (emerged parasitoids) ranged from 80.8 to 98.4%, and was deemed satisfactory. The emergence rates of T. exiguum and T. acacioi were affected by temperature. Temperature also affected the sex ratio of T. exiguum at 25/30°C, whereas T. pretiosum and T. acacioi produced females predominantly independent of temperature. Overall, the parasitoid T. atopovirilia was the most efficient in parasitizing H. virescens eggs, though the levels of parasitism obtained might not ensure its successful use in biological control programs. The temperature-related differences in biological traits observed in the four Trichogramma species tested hint at the importance of making careful choices regarding climatic conditions where the parasitoid is going to be used when selecting a species for biological control programs.

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“…The mass rearing of this parasitoid in Sitotroga cerealella (Olivier) (Lepidoptera: Gelechidae) or Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) eggs has allowed its use in programs of IPM (Parra, 1997;Pratissoli et al, 2005b). On other hand, pesticides may limit the efficiency of biological control agents.…”

Section: Introductionmentioning

confidence: 99%

Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae)

Pratissoli

Milanez

Barbosa³

et al. 2010

Chilean J. Agric. Res.

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Trichogramma spp. (Hymenoptera: Trichogrammatidae) can control Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae). On the other hand, pesticides may reduce the efficiency of natural enemies. The objective was to evaluate the side-effects of fungicides used in the production of cucurbitaceous crops on Trichogramma atopovirilia Oatman & Platner parasitizing D. hyalinata eggs. The fungicides used in bioassays were: azoxystrobin (0.08 g active ingredient) and thiophanate-methyl (0.49 g ai L -1 ). Cardboards with 30 D. hyalinata eggs previously immersed in fungicide solutions and distilled water (control) were offered separately to 20 newly emerged T. atopovirilia females in glass tubes. Parasitism, parasitism reduction, emergence, sex ratio, and number of individuals per egg were evaluated. The fungicides chlorothalonil, thiophanate-methyl and tebuconazole reduced parasitism of T. atopovirilia by 43.37, 27.64 and 18.51%, respectively. However, parasitism with azoxystrobin (79.21%) was higher than the control (67.37%) (P ≤ 0.05). Chlorothalonil, thiophanate-methyl and tebuconazole reduced emergence by 73.77, 75.62 and 79.35% (P ≤ 0.05), respectively. Azoxystrobin and thiophanate-methyl reduced the sex ratio by 0.77 and 0.76 (P ≤ 0.05), respectively. Fungicides did not reduce the number of individuals per egg. The fungicides azoxystrobin and mancozeb were selective for T. atopovirilia for most studied parameters suggesting that these products must have the priority in crop disease management to allow efficient biological control of T. atopovirilia against D. hyalinata.

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Thermal requirements of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lep.: Geometridae), in eggs of two alternative hosts

Abstract: ABSTRACT

Cited by 22 publications

References 13 publications

Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)

Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae)

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