scholarly journals Effects of temperature on the development of Eumicrosoma blissae (Hymenoptera: Scelionidae), an egg parasitoid of the oriental chinch bug, Cavelerius saccharivorus Okajima (Heteroptera: Lygaeidae)

2007 ◽  
Vol 42 (4) ◽  
pp. 613-617 ◽  
Author(s):  
Yasutsune Sadoyama
Keyword(s):  
Egg Parasitoid ◽  
Chinch Bug ◽  
Effects Of Temperature ◽  
Cavelerius Saccharivorus

scholarly journals Effects of temperature on development, reproduction and size of Trichogramma achaeae: implications for biological control

2020 ◽  
Author(s):  
Long Chen ◽  
Jesper Givskov Sorensen ◽  
Annie Enkegaard
Keyword(s):  
Biological Control ◽  
Development Time ◽  
Thermal Conditions ◽  
Egg Parasitoid ◽  
Wing Size ◽  
Control Efficacy ◽  
Thermal Biology ◽  
Female Longevity ◽  
Trichogramma Achaeae ◽  
Effects Of Temperature

The performance of biological control agents (BCAs) in outdoor crops is strongly regulated by ambient temperature. Understanding the thermal biology of BCAs and manipulating their thermal performance could improve biological control efficacy. In this study, the effects of temperature on several life history parameters (longevity, fecundity, development time, wing size) of the recently commercialised egg parasitoid Trichogramma achaeae Nagaraja & Nagarkatti (Hymenoptera: Trichogrammatidae) was examined. First, parasitoids were reared at 23 °C and tested in the laboratory at four constant temperatures (15, 20, 25 and 30 °C). Results demonstrated that temperature significantly altered all above parameters. Second, developmental acclimation was applied to manipulate the laboratory performance. Parasitoids were allowed to develop at either of the above four temperatures and their performance were compared at 23 °C. Results showed that developmental acclimation had a significant impact on fecundity, development time and wing size but not on female longevity. Our results have implications for improving the performance of T. achaeae in mass production and for its application for biological control under different thermal conditions.

scholarly journals Evidence of Environmental and Vertical Transmission of Burkholderia Symbionts in the Oriental Chinch Bug, Cavelerius saccharivorus (Heteroptera: Blissidae)

2014 ◽  
Vol 80 (19) ◽  
pp. 5974-5983 ◽  
Author(s):  
Hideomi Itoh ◽  
Manabu Aita ◽  
Atsushi Nagayama ◽  
Xian-Ying Meng ◽  
Yoichi Kamagata ◽  
...  
Keyword(s):  
16S Rrna ◽  
Vertical Transmission ◽  
Burkholderia Cepacia ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Rrna Gene ◽  
Diagnostic Pcr ◽  
Content Type ◽  
Chinch Bug ◽  
Cavelerius Saccharivorus

ABSTRACTThe vertical transmission of symbiotic microorganisms is omnipresent in insects, while the evolutionary process remains totally unclear. The oriental chinch bug,Cavelerius saccharivorus(Heteroptera: Blissidae), is a serious sugarcane pest, in which symbiotic bacteria densely populate the lumen of the numerous tubule-like midgut crypts that the chinch bug develops. Cloning and sequence analyses of the 16S rRNA genes revealed that the crypts were dominated by a specific group of bacteria belonging to the genusBurkholderiaof theBetaproteobacteria. TheBurkholderiasequences were distributed into three distinct clades: theBurkholderia cepaciacomplex (BCC), the plant-associated beneficial and environmental (PBE) group, and the stinkbug-associated beneficial and environmental group (SBE). Diagnostic PCR revealed that only one of the three groups ofBurkholderiawas present in ∼89% of the chinch bug field populations tested, while infections with multipleBurkholderiagroups within one insect were observed in only ∼10%. Deep sequencing of the 16S rRNA gene confirmed that theBurkholderiabacteria specifically colonized the crypts and were dominated by one of threeBurkholderiagroups. The lack of phylogenetic congruence between the symbiont and the host population strongly suggested host-symbiont promiscuity, which is probably caused by environmental acquisition of the symbionts by some hosts. Meanwhile, inspections of eggs and hatchlings by diagnostic PCR and egg surface sterilization demonstrated that almost 30% of the hatchlings vertically acquire symbioticBurkholderiavia symbiont-contaminated egg surfaces. The mixed strategy of symbiont transmission found in the oriental chinch bug might be an intermediate stage in evolution from environmental acquisition to strict vertical transmission in insects.

Sign in / Sign up

Export Citation Format

Share Document