scholarly journals Chemical egg defense in a green lacewing (Ceraeochrysa smithi)

1996 ◽  
Vol 93 (8) ◽  
pp. 3280-3283 ◽  
Author(s):  
T. Eisner ◽  
A. B. Attygalle ◽  
W. E. Conner ◽  
M. Eisner ◽  
E. MacLeod ◽  
...  
Keyword(s):  
2016 ◽  
Vol 3 (3) ◽  
Author(s):  
ARVIND KUMAR ◽  
POOJA KHULBE

Influence of abiotic factors and hosts on population dynamics of green lacewing, Chrysoper lacarnea (Stephens) was studied in sunflower, Helianthus annus (Linn.).The maximum number of C. carnea population was found during mid March –mid April in the first year and mid April – mid May in the second year in sunflower crop. The maximum number of host population viz. egg and larva of Helicoverpa armigera and Myzuspe rsicae population were found during mid March –mid April in both the year and correlation studies revealed the positive and significant correlation between larval population of H. armigera, M. persicae and predator C. carnea. While there was no significant relationship found between eggs of H. armigera and C. carnea. The C. carnea population on H. annus during both the year was positively correlated with maximum temperature and found significant,while negatively correlated with relative humidity.However, no significant correlation of C. carnea was found with minimum temperature in both the year.


2006 ◽  
Vol 35 (3) ◽  
pp. 371-376 ◽  
Author(s):  
Madelaine Venzon ◽  
Maria C. Rosado ◽  
Denise E. Euzébio ◽  
Brígida Souza ◽  
José H. Schoereder

2018 ◽  
Vol 36 (4) ◽  
pp. 119-125
Author(s):  
Jana C. Lee ◽  
Barry Finley ◽  
S. Michael Flores ◽  
Katerina Velasco Graham ◽  
J. Megan Woltz ◽  
...  

Abstract The azalea lace bug, Stephanitis pyrioides, is a serious pest of azaleas and rhododendrons which is often controlled by systemic insecticides. However, the efficacy of softer approaches such as biological control and water sprays against this pest on rhododendrons is unknown. Therefore, we tested the commercially available green lacewing predator, Chrysoperla rufilabris, and water sprays on lace bug infestation in one laboratory and four field trials. First, 2nd instar predator larvae were confirmed to consume lace bug nymphs and sometimes adults. Second, tapping predator larvae from hexcel units over dry leaves of potted rhododendrons and shaking loose eggs over wet leaves were reliable application methods. Third, predator larvae released onto potted rhododendrons lowered lace bug counts for two weeks. Fourth, after four bi-weekly applications, plants receiving egg cards or water-sprays had reduced lace bug counts and fewer damaged leaves than control plants. Fifth, landscape plants receiving the sequential combination of water spray followed by predator egg releases had 44 to 90% lower lace bug abundance and fewer damaged leaves than the control. After lace bugs were initially dislodged, hatching predators might have consumed hatching lace bugs. Index words: biological control, Chrysoperla rufilabris (Burmeister), mechanical control, rhododendron, Stephanitis pyrioides (Scott) Species used in this study: Azalea lace bug (Stephanitis pyrioides Scott), green lacewing (Chrysoperla rufilabris Burmeister), Rhododendron (Rhododendron spp.)


BioControl ◽  
2015 ◽  
Vol 61 (1) ◽  
pp. 57-67 ◽  
Author(s):  
Darinka Gonzalez ◽  
Anabela Nave ◽  
Fátima Gonçalves ◽  
Fernando M. Nunes ◽  
Mercedes Campos ◽  
...  

2018 ◽  
Vol 285 (1877) ◽  
pp. 20180369 ◽  
Author(s):  
Masayuki Hayashi ◽  
Masashi Nomura ◽  
Daisuke Kageyama

Evolutionary theory predicts that the spread of cytoplasmic sex ratio distorters leads to the evolution of host nuclear suppressors, although there are extremely few empirical observations of this phenomenon. Here, we demonstrate that a nuclear suppressor of a cytoplasmic male killer has spread rapidly in a population of the green lacewing Mallada desjardinsi . An M. desjardinsi population, which was strongly female-biased in 2011 because of a high prevalence of the male-killing Spiroplasma endosymbiont, had a sex ratio near parity in 2016, despite a consistent Spiroplasma prevalence. Most of the offspring derived from individuals collected in 2016 had 1 : 1 sex ratios in subsequent generations. Contrastingly, all-female or female-biased broods appeared frequently from crossings of these female offspring with males derived from a laboratory line founded by individuals collected in 2011. These results suggest near-fixation of a nuclear suppressor against male killing in 2016 and reject the notion that a non-male-killing Spiroplasma variant has spread in the population. Consistently, no significant difference was detected in mitochondrial haplotype variation between 2011 and 2016. These findings, and earlier findings in the butterfly Hypolimnas bolina in Samoa, suggest that these quick events of male recovery occur more commonly than is generally appreciated.


2002 ◽  
Vol 2 (9) ◽  
pp. 925-926 ◽  
Author(s):  
Muhammad Ashfaq . ◽  
Abida Nasreen . ◽  
Ghulam Mustafa Cheem .

Zootaxa ◽  
2010 ◽  
Vol 2565 (1) ◽  
pp. 55 ◽  
Author(s):  
CATHERINE A. TAUBER ◽  
OLIVER S. FLINT, JR.

With the purpose of promoting nomenclatural stability, this paper addresses a number of errors, omissions, and controversial conclusions in a recent revision of the green lacewing genus Ceraeochrysa by Freitas et al. (2009). 1. Valid species, new combinations and synonymies: (a) We identified Ceraeochrysa chiricahuae Freitas and Penny (in Freitas et al. 2009), Chrysopa forreri Navás, and Chrysopa intacta Navás as subjective synonyms. Thus, Ceraeochrysa intacta, a species that was previously synonymized under Ceraeochrysa placita (Banks), becomes the valid name of the species [New status, new combination]. Chrysopa forreri is now synonymized under Cer. intacta, not Cer. placita [New synonymy]. And, Cer. chiricahuae becomes a junior synonym of Cer. intacta, not a valid species of Ceraeochrysa [New synonymy]. (b) We enumerate specific internal and external features of the Chrysopa cornuta Navás type that identify it as conspecific with Ceraeochrysa caligata (Banks), not Ceraeochrysa cincta (Schneider) as proposed by Freitas et al. (2009). Thus, Ceraeochrysa cornuta (Navás), which has priority, is reinstated as the valid name [Reinstated status, reinstated combination], and Ceraeochrysa caligata (Banks) is reinstated as a junior subjective synonym of Cer. cornuta, not a valid species [Reinstated synonymy]. (c) We provide documented evidence for reinstating three synonymies that Freitas et al. had reversed [Reinstated synonymies]: (i) Allochrysa parvula Banks is a junior subjective synonym of Ceraeochrysa lineaticornis (Fitch); (ii) Chrysopa columbiana Banks is a junior subjective synonym of Ceraeochrysa lineaticornis (Fitch); (iii) Chrysopa rochina (Navás) is a junior subjective synonym of Ceraeochrysa cincta (Schneider). 2. Generic assignments: (a) Visual evidence is provided for the placement of Ceraeochrysa laufferi (Navás) in Ungla. Therefore, Ungla laufferi (Navás) is reinstated as the valid name [Reinstated combination]. (b) We question Freitas et al.’s rationale for including Cer. placita (Banks) and Cer. intacta (Navás) (as Cer. chiricahuae Freitas and Penny) in the genus Ceraeochrysa; female and larval features of the two species differ markedly from those used to characterize Ceraeochrysa species. As an alternative that recognizes the uncertainty surrounding the generic placement of these species and that avoids additional, unnecessary name changes, we propose including the caveat “genus incertae sedis” with the names, as follows: Ceraeochrysa placita (Banks), genus incertae sedis, and Ceraeochrysa intacta (Navás), genus incertae sedis. 3. Type designations: (a) Errors concerning the Chrysopa furculata Navás type in the Muséum national d’Histoire naturelle, Paris (MNHN), are corrected, and doubts raised by Freitas et al. (2009) concerning the identification of this specimen as the holotype are removed. (b) The earlier designation of the Chrysopa rochina (Navás) type in the MNHN as the lectotype (not holotype) is verified.


Sign in / Sign up

Export Citation Format

Share Document