Natural parasitism in eggs of Anticarsia gemmatalis Hübner (Lepidoptera, Noctuidae) by Trichogramma spp. (Hymenoptera, Trichogrammatidae) in Brazil

Avanci, Marion R. F.; Foerster, Luís A.; Cańete, Carolina Lomando

doi:10.1590/s0085-56262005000100017

Cited by 12 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the subtropical region of Southern Brazil, seven species of microhymenoptera were recorded parasitizing eggs of the velvetbean caterpillar Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) in soybean crops (Polaszek and Foerster 1997;Foerster and Avanci 1999;Cañete and Foerster 2003;Avanci et al 2005). Five of these species belonged to the genus Trichogramma, and except for T. pretiosum Riley, the other species were recorded for the first time parasitizing eggs of A. gemmatalis.…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature on the immature development and emergence of five species of Trichogramma

Foerster

2008

BioControl

Self Cite

View full text Add to dashboard Cite

Five constant temperatures between 14 and 30°C were used to evaluate their effect on the development time and adult emergence of five Trichogramma species found parasitizing eggs of the velvetbean caterpillar Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) on soybeans in subtropical Southern Brazil. Host eggs were parasitized at 20°C and then transferred to the study temperatures to follow development and emergence of parasitoids. All five species were able to develop and emerge within the range of temperatures evaluated, and the effect of temperature on development rates could be described by linear regression. Trichogramma acacioi Brun, Moraes & Soares and T. rojasi Nagaraja & Nagarkatti were the most cold-tolerant species, with lower threshold temperatures of 8.1 ± 0.16°C and 9.2 ± 0.16°C, respectively. Trichogramma atopovirilia Oatman & Platner was the least cold-adapted species, with a lower threshold of 10.2 ± 0.13°C. Degree-day accumulation ranged from 153.8 DD for T. atopovirilia to 190.7 DD for T. acacioi. Adult emergence was higher than 90% for T. atopovirilia and T. pretiosum at all temperatures, whereas T. lasallei Pinto emergence dropped to 71.3% at 14°C and to 58.3% at 26°C, both significantly lower than the emergence of T. pretiosum and T. atopovirilia. Significantly less T. acacioi adults emerged at 30°C than either T. pretiosum or T. atopovirilia. The sex-ratio was not affected within the range of temperatures studied, and varied from 0.65 to 0.88 (female/ (male ? female)). Differences among Trichogramma spp. densities in the field can be attributed to slower development rates and/or reduced emergence of adults, both at low and high temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of temperature on the immature development and emergence of five species of Trichogramma

Foerster

2008

BioControl

Self Cite

View full text Add to dashboard Cite

show abstract

“…Trichogramma atopovirilia Oatman and Platner and Trichogramma acacioi Brun, Moraes and Soares, as well as Trichog. pretiosum , are naturally found in Southern Brazil and were collected parasitizing eggs of the velvetbean caterpillar Anticarsia gemmatalis Hübner in soybean fields, during summer, in Southeastern Paraná State ( Avanci et al. 2005 , Foerster and Foerster 2009 ).…”

mentioning

confidence: 99%

Temperature Effects on the Development and Reproduction of ThreeTrichogramma(Hymenoptera: Trichogrammatidae) Species Reared onTrichoplusia ni(Lepidoptera: Noctuidae) Eggs

Krechemer¹,

Foerster²

2015

J Insect Sci

View full text Add to dashboard Cite

The cabbage looper, Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae) is a generalist species and an important pest of Brassicaceae worldwide. Egg parasitoids are a feasible alternative for the control of this species. We evaluated the suitability of T. ni eggs as hosts for three Trichogramma Westwood (Hymenoptera: Trichogrammatidae) species and their tolerance to survive and develop within a range of temperatures between 15 and 30°C under laboratory conditions. The species evaluated were Trichogramma pretiosum Riley, Trichogramma atopovirilia Oatman and Platner, and Trichogramma acacioi Brun, Moraes and Soares. Parasitism rate was affected by temperature, parasitoid species, and by the interaction between these two factors. Parasitoids developed and reproduced in the range of temperatures evaluated, but Trichog. acacioi failed to parasitize T. ni eggs at 30°C. The highest parasitism rates of Trichog. atopovirilia and Trichog. pretiosum occurred at 20 and 25°C and Trichog. acacioi at 25°C, with parasitism rate above 70% in the three species. Parasitoid emergence was not affected by temperature or species. The estimated thermal constant and lower temperature threshold were 134.6 DD and 10.6°C for Trichog. pretiosum and 130.1 DD and 11.2°C for Trichog. atopovirilia. The results demonstrated that Trichog. pretiosum and Trichog. atopovirilia are the most suitable species for the control of T. ni, as they can remain active throughout the year in subtropical regions.

show abstract

“…Due to their relatively inexpensive mass rearing systems using factitious hosts, several species are employed in inundative biological control programs around the world (Pak 1990, Bueno et al 2012. In some regions, like Southern Brazil, these parasitoids can be an important component of the local agroecosystem, reaching significant levels of parasitism and therefore contributing to the natural control of insect pests (Avanci et al 2005). This seems to be the case of Trichogramma pretiosum Riley and Trichogramma atopovirilia Oatman & Platner, two indigenous species that were found parasitizing eggs of the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae) in brassicaceous crops in the state of Paraná, Southern Brazil.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Total Mortality Caused by Two Species of Trichogramma on Its Natural Host Plutella xylostella (L.) at Different Temperatures

2015

View full text Add to dashboard Cite

Trichogramma pretiosum Riley and Trichogramma atopovirilia Oatman & Platner are natural enemies of Plutella xylostella (L.) in Southern Brazil. Laboratory studies to evaluate parasitoids performance under different conditions, such as temperature regimes, are necessary to assess their potential as biocontrol agents of P. xylostella. In most studies involving Trichogramma, parasitism rate is the main parameter used to evaluate parasitoid performance, ignoring that parasitoids can cause egg mortality by feeding on the host content and/or to multiple drilling without laying eggs. This study was conducted to investigate three main issues: how temperature affects T. pretiosum and T.atopovirilia development on eggs of P. xylostella, whether or not these species respond differently to temperature, and how important is the mortality they cause besides parasitism on P. xylostella. Temperature effects (from 10 to 30°C) on development, survival, parasitism rate, mortality, and total mortality caused by T. pretiosum and T. atopovirilia on eggs of P. xylostella were evaluated. Temperature affected the development time, female longevity, parasitism rate, mortality not directly related to parasitoid larval development, and total mortality caused on the host. No significant differences were recorded for the estimated thermal requirements for T. pretiosum and T. atopovirilia. However, the higher mortality caused by T. pretiosum indicates that this parasitoid is the most suitable to be used against P. xylostella. Also, the results suggest that the use of parasitism rate as the only parameter to evaluate the performance of T. pretiosum and T. atopovirilia may underestimate the potential of these parasitoids in regulating pest populations.

show abstract

Natural parasitism in eggs of Anticarsia gemmatalis Hübner (Lepidoptera, Noctuidae) by Trichogramma spp. (Hymenoptera, Trichogrammatidae) in Brazil

Cited by 12 publications

References 7 publications

Effects of temperature on the immature development and emergence of five species of Trichogramma

Effects of temperature on the immature development and emergence of five species of Trichogramma

Temperature Effects on the Development and Reproduction of ThreeTrichogramma(Hymenoptera: Trichogrammatidae) Species Reared onTrichoplusia ni(Lepidoptera: Noctuidae) Eggs

Assessing the Total Mortality Caused by Two Species of Trichogramma on Its Natural Host Plutella xylostella (L.) at Different Temperatures

Contact Info

Product

Resources

About