Results 191 to 200 of about 1,710,215 (241)

INDUCING HOST ACCEPTANCE TO ENCAPSULATED XENOGENEIC MYOBLASTS

Transplantation, 2001
Cell encapsulation holds promise for the chronic delivery of recombinant proteins such as erythropoietin. Encapsulated xenogeneic mouse C2C12 myoblasts display long-term survival in the central nervous system whereas they do not in the subcutaneous tissue, suggesting that encapsulation only partially prevents affector and effector mechanisms of the ...
Rinsch, C., Peduto, G., Schneider, B. L., Aebischer, P.   +3 more
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Criteria for host-plant acceptance by aphids

1992
Aphid probing or stylet penetration behaviour is needed (1) to get appropriate chemical information by internal gustation (Wensler, 1977) and (2) to reach the sieve elements in the vascular bundle for actual feeding. Transmission electron microscopy (TEM) showed that Aphis fabae (Scop.) on its host Vicia faba (L.) punctured many, if not all plant cells
Tjallingii, W.F., Mayoral, A.
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Finding and Accepting Host Plants

1984
The plant-based resource units insects use for refugia, mating sites, and food vary in two fundamental ways. First, their distributions in time and space are usually patchy, as plants themselves assume distributions dictated by the patchiness of suitable soils and growing conditions.
James R. Miller, Karen L. Strickler
openaire   +1 more source

Host-plant selection: when to accept a plant

1998
Abstract One of the most notable features of herbivorous insects that has emerged from the previous chapters is that most species are very selective feeders and meticulously choose the plants on which they deposit their eggs. Recent research on several species has shown that they select not only certain plant species but also specific ...
L. M. Schoonhoven, T. Jermy, J. J. A. van Loon   +2 more
openaire   +1 more source

Changes in host acceptance and host suitability as an effect of rearing Trichogramma maidis on a factitious host

Entomologia Experimentalis et Applicata, 1989
AbstractHost acceptance and suitability of Ostrinia nubilalis Hbn. for Trichogramma maidis Pint. et Voeg. (Hymenoptera: Trichogrammatidae) were studied, after rearing the parasitoids on O. nubilalis or Ephestia kuehniella Oliv. (Lepidoptera: Pyralidae) for various numbers of generations. In cages, containing two maize plants with in total 30 egg masses
van Bergeijk, K.E., Bigler, F., Kaashoek, N.K., Pak, G.A.   +3 more
openaire   +2 more sources

Host-Finding, Host-Recognition, and Host-Acceptance Behavior of Cephalonomia tarsalis (Hymenoptera: Bethylidae)

Annals of the Entomological Society of America, 1998
Several bethylids, including various Cephalonomia spp., are commonly associated with the stored-commodity environment. These parasitoids are often host-specific and can be important biocontrol agents. Although C. tarsalis (Ashmead) reportedly uses several different stored-product beetle hosts, it appeal's to be primarily associated with the saw-toothed
Ralph W. Howard, Marlene Charlton, Ralph E. Charlton   +2 more
openaire   +1 more source

Host population density influence on host acceptance in Trichogramma

Entomologia Experimentalis et Applicata, 1991
AbstractIn 7 Trichogramma species (Hymenoptera, Trichogrammatidae) the percentage of females, parasitizing at least one host, directly depends on the number of host eggs. Trichogramma females that refused Sitotroga eggs will still oviposit in natural hosts. These refusing females were yet active, moved in test tubes and sometimes contacted the host. It
S. Ya. Reznik, T. Ya. Umarova
openaire   +1 more source

Host‐finding behavior, host acceptance, and host suitability of the parasite Xanthopimpla stemmator

Entomologia Experimentalis et Applicata, 1994
AbstractXanthopimpla stemmator (Thunberg)(Hymenoptera: Ichneumonidae), a solitary endoparasite of pupae of Old World lepidopteran stalkborers, was recently imported into Texas as a candidate for biological control of New World stalkborers. Information on host acceptability, host suitability and cues responsible for host finding were necessary to gain ...
Y. Hailemichael, J. W. Smith, R. N. Wiedenmann   +2 more
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Host plant acceptance in a generalist insect: threshold, feedback or choice?

Behaviour, 2020
Abstract Generalist insect herbivores feed mainly on one or more primary host species, but unlike specialists they also accept numerous secondary hosts. This raises the question of how generalists retain a broad host range yet allocate most of their eggs to primary hosts. We considered three possible explanations.
Jones, Lachlan C., Rafter, Michelle A., Walter, Gimme H.   +2 more
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Host concealment: a determinant for host acceptance and feeding in an ectoparasitoid wasp

Oikos, 2000
In general, ectoparasitoids attack concealed hosts in protected situations whereas endoparasitoids use both concealed and exposed hosts. The difference is assumed to be the consequence of ecological constraints; ectoparasitic larvae are vulnerable both to predation and to climatic factors such as rainfall, and, hence, require some ...
openaire   +1 more source