Results 61 to 70 of about 464 (138)

Evidence for population self-regulation, reproductive competition and arrhenotoky in a thelastomatid nematode of cockroaches

open access: yesParasitology, 1988
SummaryExperimental infection of adultDrymaplaneta variegataShelford, 1909 (Blattodea) with known numbers of eggs ofProtrellus dixoniZervos, 1987 (Nematoda: Thelastomatidae) showed that each infrapopulation was regulated by a density-dependent and sex-dependent reduction in infection intensity with infrapopulation age.
openaire   +1 more source

Sex ratio in two species of Pegoscapus wasps (Hymenoptera: Agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games?

open access: yesRevista de Biología Tropical, 2009
The fig pollinating wasps (Hymenoptera: Agaonidae) have obligate arrhenotoky and a breeding structure that fits local mate competition (LMC). It has been traditionally assumed that LMC organisms adjust the sex ratio by laying a greater proportion of male
William Ramírez-Benavides   +2 more
doaj   +2 more sources

Biology of Microctonus sp. (Hymenoptera: Braconidae), a parasitoid of Cyrtomon luridus BOH. (Coleoptera: Ccurculionidae)

open access: yesScientia Agricola, 2004
Cyrtomon luridus (Boh.), a native insect of wild Solanaceae, has adapted to the medicinal plant Duboisia sp., introduced from Australia, causing damages up to 100% mortality. Microctonus sp. is the most important natural enemy of C.
Paulo Tironi   +2 more
doaj  

Biología del Trips Frankliniella Occidentalis (Pegande) (Thysanoptera: thripidae) sobre Crisantemo Chrysanthemum morifolium l. bajo condiciones de laboratorio Developmentaland reproductive biology of Frankliniella Occidentslis (Pegande) (Thysanoptera: thripidae) on Chrysanthemum

open access: yesAgronomía Colombiana, 1989
La especie Frankliniella occidentalis (Pegande) se encontró causando daño a flores de crisantemo en una empresa de la<br />Sabana de Bogotá. Se estudió su biología bajo condiciones de laboratorio (24,31 ± 2,50C y 66,36 ± 12% H.R.).
Cardenas Estrella, Corredor Dario
doaj  

Parthenogenesis, chromosomal polymorphism and morphological variation in Chironomids

open access: yes, 1973
Typescript (roneo copy)Thesis (PhD) -- University of Melbourne, Office of Research, 1973Includes bibliographical references (leaves 240-265)Parthenogenesis, in the forms of arrhenotoky, deuterotoky, or thelytoky, is a quite common phenomenon in the ...
Porter, David Laurence.
core   +1 more source

Strategies of Laying Workers in Populations of the Honeybee, Apis mellifera {Hymenoptera:

open access: yes, 2008
In colonies of Apis mellifera Linnaeus 1758, VP develop their o.varies and start laying eggs after they become queenless. Usually dd develop from these Qlaid eggs (arrhenotokous parthenogenesis). In Apis mellifera capensis Escholtz 1822 laying 89 produce
Robin F. A. Moritz, Hymenoptera Apidae
core  

Spatial Differences in Worker Policing . . .

open access: yes, 2003
ost colonies. Key words: Apis mellifera capensis, honeybees, social parasitism, worker policing, worker reproduction. Introduction Social parasitism in which mated gynes seek and invade host colonies and start reproducing at the expense of the host is
P. Neumann   +4 more
core  

Halyomorpha halys (Hemiptera: Pentatomidae), a new alternative host for egg parasitoid Ooencyrtus kuvanae (Hymenoptera: Encyrtidae)

open access: yes, 2022
International audienceOne of the most important egg parasitoids of gypsy moth is Ooencyrtus kuvanae (Howard) (Hymenoptera: Encyrtidae). We have already developed a method to rear O. kuvanae on the laboratory host Philosamia ricini (Danovan) (Lepidoptera:
Venard, Marine   +5 more
core  

Parthenogenesis under influence of microbes in Thysanoptera [PDF]

open access: yes, 2008
Der Reproduktionsmechanismus der meisten Thysanopteren beruht auf Haplodiploidie (EVANS et al. 2004). Die Mehrzahl der Arten vermehrt sich durch Arrhenotokie. Bei einigen Arten sind Männchen jedoch sehr selten, sie vermehren sich durch Thelytokie.
Kumm, Sandra   +2 more
core  

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