Oviposition preference and levels Adaptation of Caryedon serratus Olivier (Coleoptera, Bruchidae) hosts plant strain to groundnut (Arachis hypogaea, Fabaceae)

2011 ◽  
Vol 1 (1) ◽  
pp. 48-55
Author(s):  
Mbacké Sembène Sembène ◽  
Awa Ndiaye ◽  
Ali Doumma ◽  
Toffène Diome ◽  
Assane Ndong ◽  
...  
Keyword(s):  
Site Selection ◽  
Host Selection ◽  
Host Plants ◽  
Oviposition Preference ◽  
The Other ◽  
Oviposition Site Selection ◽  
Selection Principle ◽  
Caryedon Serratus ◽  
Wild Strains ◽  
Wild Hosts

The objective of the present study was to assess oviposition site selection by females of various groundnut seed‐beetle strains, Caryedon serratus, bred from different hosts. Tests of choice on pods of various host plants were initially made. Egg distributions among hosts were compared. The levels of adaptation of wild strains on groundnut and the capacities of development of \"groundnut\" strain on the seeds of the wild hosts were also tested. Results indicated that strains may be considered as developing according to Hopkins\' host selection principle. Results obtained from the levels of adaptation tests revealed that the various strains were as identical as for their intrinsic possibilities of development on the groundnut. The parameter weight of the adults indicated that the “Bauhinia” strain was adapted intrinsically less well than the other strains to the development on the groundnut. The fecundity rate revealed that the various strains were identical as for their intrinsic possibilities of development on the groundnut but “Bauhinia” seemed less good adapted to the groundnut. The passage of the groundnut strain to the wild hosts is possible but, raised on wild seeds; this one behaves although on groundnut.

scholarly journals Suboptimal larval habitats modulate oviposition of the malaria vector mosquitoAnopheles gambiae

2015 ◽  
Author(s):  
Eunho Suh ◽  
Dong-Hwan Choe ◽  
Ahmed M Saveer ◽  
Laurence J Zwiebel
Keyword(s):  
Malaria Vector ◽  
Site Selection ◽  
Oviposition Preference ◽  
Oviposition Site ◽  
Oviposition Site Selection ◽  
Larval Habitats ◽  
Dimethyl Disulphide ◽  
Gravid Females ◽  
Oviposition Sites ◽  
Selection Of

Selection of oviposition sites by gravid females is a critical behavioural preference in the reproductive cycle ofAnopheles gambiae, the principal Afrotropical malaria vector mosquito. Several studies suggest this decision is mediated by semiochemicals associated with potential oviposition sites. To better understand the chemosensory basis of this behaviour and identify compounds that can modulate oviposition, we examined the generally held hypothesis that suboptimal larval habitats give rise to semiochemicals that negatively influence the oviposition preference of gravid females. Dual-choice bioassays indicated that oviposition sites conditioned in this manner do indeed foster significant and concentration dependent aversive effects on the oviposition site selection of gravid females. Headspace analyses derived from aversive habitats consistently noted the presence of dimethyl disulphide (DMDS), dimethyl trisulphide (DMTS) and 6-methyl-5-hepten-2-one (sulcatone) each of which unitarily affectedAn. gambiaeoviposition preference. Electrophysiological assays across the antennae, maxillary palp, and labellum of gravidAn. gambiaerevealed differential responses to these semiochemicals. Taken together, these findings validate the hypothesis in question and suggest that suboptimal environments forAn. gambiaelarval development results in the release of DMDS, DMTS and sulcatone that impact the response valence of gravid females to directly modulate the chemical ecology of oviposition site selection.

Larval experience induces adult aversion to rearing host plants: a novel behaviour contrary to Hopkins' host selection principle

2012 ◽  
Vol 37 (3) ◽  
pp. 204-211 ◽  
Author(s):  
BRIAN J. MADER ◽  
SIMON P. DAOUST ◽  
MICHAEL CARDINAL-AUCOIN ◽  
ERIC BAUCE ◽  
EMMA DESPLAND
Keyword(s):  
Host Selection ◽  
Host Plants ◽  
Selection Principle ◽  
Novel Behaviour

scholarly journals Oviposition site selection and survival of susceptible and resistant larvae of Helicoverpa armigera (Lepidoptera: Noctuidae) on Bt and non-Bt cotton

2016 ◽  
Vol 106 (6) ◽  
pp. 710-717 ◽  
Author(s):  
T.T.A. Luong ◽  
S.J. Downes ◽  
B. Cribb ◽  
L.E. Perkins ◽  
M.P. Zalucki
Keyword(s):  
Helicoverpa Armigera ◽  
Site Selection ◽  
Oviposition Preference ◽  
Resistance Management ◽  
Oviposition Site ◽  
Bt Cotton ◽  
Oviposition Site Selection ◽  
Bt Toxin ◽  
Cotton Plants ◽  
Helicoverpa Armígera

AbstractIn Australia Bt cotton has been planted since 1996, and has greatly improved the control of its key target Helicoverpa armigera (Hübner). There is no strong evidence that genetically modified cotton has been selected for significant physiological resistance to Bt toxin in field populations. There are many possible explanations for the lack of apparent selection that range from high compliance with the resistance management strategy for this technology to a lack of behavioral preference in key traits such as oviposition that could favor survival. To date most experiments that test oviposition of H. armigera on Bt cotton vs. conventional cotton have been done with susceptible moths. We determine the oviposition preference of a field isolated Bt resistant line of H. armigera and a susceptible counterpart when given a choice of non-Bt cotton and Bt-cotton with the same genetic background, and test whether there is any relationship between oviposition site selection (different plant structures) and the survival of the first instar larvae. Within cotton plants, our experiments consistently showed that both resistant and susceptible moths did not choose plants or plant parts that were less toxic in terms of Bt toxin on which to lay eggs. There was one exception in that susceptible moths were more likely to lay eggs on squares of Bt cotton plants than squares of non-Bt cotton. As expected, the mortality of susceptible H. armigera neonates was significantly higher on structures of Bt cotton plants than on those structures of conventional cotton, and survival was greater on flowers than on other structures of Bt cotton. This confirms opportunities for selection for resistance, and demonstrates no advantage in this respect to carrying resistance genes that might overcome the Bt toxins.

THE EFFECT OF CONSPECIFICS ON OVIPOSITION SITE SELECTION AND OVIPOSITION BEHAVIOUR IN AEDES TOGOI (THEOBOLD) (DIPTERA: CULICIDAE)

1997 ◽  
Vol 129 (6) ◽  
pp. 1173-1176 ◽  
Author(s):  
David Y. Onyabe ◽  
Bernard D. Roitberg
Keyword(s):  
Intraspecific Competition ◽  
Site Selection ◽  
Oviposition Preference ◽  
Food Supplements ◽  
Oviposition Site ◽  
Conspecific Attraction ◽  
Oviposition Site Selection ◽  
Suitable Site ◽  
Aedes Togoi ◽  
Oviposition Sites

AbstractTwo opposing hypotheses are tested regarding the choice of oviposition sites by female Aedes togoi (Theobold) mosquitoes: (i) conspecific avoidance—females discriminate against sites harboring conspecifics to reduce intraspecific competition for their offspring and (ii) conspecific attraction—females prefer sites with conspecifics because their presence indicates suitable conditions for larvae. Under laboratory conditions, A. togoi females laid many more eggs on rearing water (LRW) containing conspecific larvae, their waste, bacteria, and food supplements than on rearing water alone (RM). In another experiment, females showed an oviposition preference for LRW sites that were devoid of A. togoi eggs compared with those harboring 50 (0.3 eggs/mL) conspecific eggs. Further, it was discovered that females laid their eggs at several sites rather than at a single suitable site. Possible reasons for such choices are discussed.

scholarly journals Biofoam of Spittlebug, Poophilus costalis (Walker): Preferential Sites, Temperature Regulation, Chemical Composition and Antimicrobial Activity

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 340
Author(s):  
Kitherian Sahayaraj ◽  
Balakrishnan Saranya ◽  
Samy Sayed ◽  
Loko Yêyinou Laura Estelle ◽  
Koilraj Madasamy
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
High Performance ◽  
Host Plants ◽  
Ground Level ◽  
College Campus ◽  
The Other ◽  
Mimosa Pudica ◽  
Ft Ir ◽  
Gas Chromatography Mass Spectroscopy

The foam produced by nymphs of Poophilus costalis on eleven different host plants belonging to eight families on St. Xavier’s College campus in India was studied over five months. The chemical composition and antimicrobial activity of these biofoams were investigated. The results revealed that P. costalis preferred Theporsia purpurea and Mimosa pudica for laying their eggs and producing foam, over the other tested plants. P. costalis produce their foam on either nodes or internodes on monocotyledons (30%) (p < 0.05), whereas on dicotyledons, they produce more foam on the stems (63.8%) than on the leaves (6.2%) (p < 0.01). The number of nymphs in each piece of foam from P. costalis varied from 1 to 3 (mean = 1.8 per plant). They produced their foam (5.7 to 45.2 cm) from the ground level on a plant. The length and breadth of a piece of foam ranged from 1.0 to 3.9 cm and 0.6 to 4.7 cm, respectively. The foam tended to be cooler than the environment. Qualitative profiling showed that the foam consists of carbohydrates, including maltose; trypsin; amino acids; protease. The foam was also analyzed using a spectrophotometer, Fourier transform infrared spectroscopy (FT-IR), gas chromatography–mass spectroscopy (GC-MS), and high-performance liquid chromatography (HPLC). The antimicrobial activity of the biofoam was the greatest against Staphylococcus aureus, the growth of which was reduced by 55.9 ± 3.9%, suggesting that the foam could be used as an antimicrobial product. However, no activities were observed against Fusarium oxysporum and Candida albicans.

Leaf traits influencing oviposition preference and larval performance ofCameraria ohridellaon native and novel host plants

2014 ◽  
Vol 152 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Lilla D'Costa ◽  
Monique S.J. Simmonds ◽  
Nigel Straw ◽  
Bastien Castagneyrol ◽  
Julia Koricheva
Keyword(s):  
Host Plants ◽  
Oviposition Preference ◽  
Leaf Traits ◽  
Larval Performance ◽  
Novel Host

Oviposition site selection: unresponsiveness ofDrosophilato cues of potential thermal stress

1997 ◽  
Vol 53 (3) ◽  
pp. 585-588 ◽  
Author(s):  
MARTIN E. FEDER ◽  
NATHANIEL BLAIR ◽  
HUNTER FIGUERAS
Keyword(s):  
Thermal Stress ◽  
Site Selection ◽  
Oviposition Site ◽  
Oviposition Site Selection
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