PROGENY PRODUCTION BY TRICHOGRAMMA MINUTUM (HYMENOPTERA: TRICHOGRAMMATIDAE) UTILIZING EGGS OF CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE) AND SITOTROGA CEREALELLA (LEPIDOPTERA: GELECHIIDAE)

Houseweart, Mark W.; Jennings, Daniel T.; Welty, Celeste; Southard, Susan G.

doi:10.4039/ent1151245-10

Cited by 36 publications

(29 citation statements)

References 11 publications

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“…Ib). This change in sex ratio with age of Trichogramma female has also been reported for other species (Houseweart et al, 1983). With continuous access to honey, the change (regression slope) in percentage female progeny did not differ significantly (p > 0.05) whether a male was present 24 h or continuously.…”

Section: Biological Parameters and Influence Of Availability Of Food'supporting

confidence: 50%

Biology ofTrichogramma ostriniae (Hym.: trichogrammatidae) reared onOstrinia nubilalis (Lep.: pyralidae) and survey for additional hosts

1995

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Section: Biological Parameters and Influence Of Availability Of Food'supporting

confidence: 50%

Biology ofTrichogramma ostriniae (Hym.: trichogrammatidae) reared onOstrinia nubilalis (Lep.: pyralidae) and survey for additional hosts

1995

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“…A alta razão sexual observada para T. atopovirilia e T. pretiosum, embora possa ser uma característica inerente às duas espécies, devido à boa adequação dos ovos de S. frugiperda aos parasitóides, pode também estar relacionada ao tempo de parasitismo, 48 horas, que corresponde à fase inicial da vida adulta, época de maior atividade das fêmeas e na qual é produzido um maior número de fêmeas. Segundo estudos de HOUSEWEART et al (1983), TOONDERS & SÁNCHEZ (1987) e HOFFMANN et al (1995, fêmeas mais jovens tendem a colocar um maior número de ovos que darão origem a fêmeas, havendo uma inversão na razão sexual à medida que estas se tornam mais velhas. Assim, HOFFMANN et al (1995) …”

Section: Resultsunclassified

“…em ovos de S. frugiperda, nos primeiros dias de parasitismo, caindo para 16% de fêmeas até o quinto dia de parasitismo. Uma outra hipótese para inversão na razão sexual com a idade da fêmea é, segundo HOUSEWEART et al (1983), a diminuição ou a falta de esperma na espermateca, devido à fêmea copular uma única vez, o que diminuiria a fertilização dos ovos e, conseqüentemente, o número de fêmeas.…”

Section: Constataram Queunclassified

Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) em ovos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae)

Beserra

Parra

2004

Rev. Bras. entomol.

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ABSTRACT. Biology and parasitism of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) on eggs of Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae). The parasitism capacity and development of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley were studied in order to select the most suitable species to control Spodoptera frugiperda (J. E. Smith). The experiments were conducted under laboratory conditions at 25±2ºC, 70±10% RH and 14L:10D photoperiod. Both T. atopovirilia and T. pretiosum showed good development and adaptation to S. frugiperda eggs even after being reared for several generations in eggs of Anagasta kuehniella Zeller. However, T. atopovirilia females were more aggressive and showed higher specificity to the pest, with a higher parasitism capacity in eggs laid with different physical barriers and were more accepted by the natural host in comparison with A. kuehniella. Because of the higher parasitism rate and specificity of T. atopovirilia to the pest's egg this species should be given preference to control S. frugiperda.

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“…Female Trichogramma spp. do not oviposit >50 eggs in a 24-h period; therefore, the number of available hosts in assays was never limiting (Houseweart et al 1983, Yu et al 1984a.…”

Section: Methodsmentioning

confidence: 99%

Assays with Commercially Produced Trichogramma (Hymenoptera: Trichogrammatidae) To Determine Suitability for Obliquebanded Leafroller (Lepidoptera: Tortricidae) Control

Lawson

Nyrop

Reissig

1997

Environmental Entomology

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Laboratory assayswere used to compare the ability of commerciallyproduced Trichogramma spp. to parasitize eggs of the obliquebanded leafroller.Choristoneura rosaceana (Harris), in the laboratory mld field. Trichogramma platneri Nagarkatti parasitized more obliquebanded leafroller eggs per egg mass than did Trichogmmlrw pretiosum Riley or TrichogramllUl minutum Riley produced by either of 2 insectaries. T millutum produced at 1 insectary caused significantlymore host mortality by host feeding and repiercing than by parasitism. Variation in parasitoid performance frDm different insectaries and among shipments from the same insectary was common. Youngegg masses were more heavilyparasitized than old egg masses. Parasitism increased as the number of conspecific female Trichograrnma spp. placed on the same host increased, but the number of eggs parasitized per female decreased. Exposure of host egg masses to female TrichogramllUl spp. prevented additional oviposition in the same egg mass by conspecific,ovipositionally experienced females but had no effect on parasitism by conspecific, ovipositionally naive females. The method used to attach sentinel egg masses to foliageinRuenced parasitism rates. Moistening the leaf with water and adhering the egg mass to the moistened leaf had the least impact. Inundative releases of TricTlOgrarnma spp. into an apple orchard paralleled laboratory assays by showing greater parasitism of obliquebanded leafroller egg masses by T platneri than \vith T minutum. However, extreme differences observed in field performance between the 2 species was not predicted from the assays.KEY WORDS Choristolleum rosaceana, TrichogmrnllUl spp., apple, biological control OBLIQUEBANDEDLEAFROLLER, Choristoneura rosaceana (Harris), is a major pest of apples in New York State. In some orchards, fruit damage from this pest can reach 20%, even when multiple insecticide applications are used for control (Lawson et al. 1996). One alternative control strategy being investigated for this pest is inundative release of commercially produced egg parasitoids of Trichogramma spp. Casual assessments in insecticidetreated commercial orchards have revealed as many as 40% of the obliquebanded leafroller egg masses parasitized by endemic Trichogramma spp., with =50 parasitized eggs per located egg mass. Hassan (1990) suggested that when selecting Trichogramma spp. for augmentative release, attributes which directly influence field performance, such as searching ability (habitat location, host location), host preference (recognition, acceptance, suitability), and tolerance to environmental conditions, should be evaluated. Hassan (1994) outlined a 3-step procedure for assessing the suitability of Trichogramma spp. First, the contact and parasitism method for evaluating host preference was recommended to screen host suitability and preference of Trichogramma spp. quickly in the laboratory. The Trichogramma spp. that indicate high levels of host acceptance would be examined under semi field conditions to assess search...

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PROGENY PRODUCTION BY TRICHOGRAMMA MINUTUM (HYMENOPTERA: TRICHOGRAMMATIDAE) UTILIZING EGGS OF CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE) AND SITOTROGA CEREALELLA (LEPIDOPTERA: GELECHIIDAE)

Cited by 36 publications

References 11 publications

Biology ofTrichogramma ostriniae (Hym.: trichogrammatidae) reared onOstrinia nubilalis (Lep.: pyralidae) and survey for additional hosts

Biology ofTrichogramma ostriniae (Hym.: trichogrammatidae) reared onOstrinia nubilalis (Lep.: pyralidae) and survey for additional hosts

Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) em ovos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae)

Assays with Commercially Produced Trichogramma (Hymenoptera: Trichogrammatidae) To Determine Suitability for Obliquebanded Leafroller (Lepidoptera: Tortricidae) Control

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