نتایج جستجو برای: host choice
تعداد نتایج: 405128 فیلتر نتایج به سال:
Insect herbivores often have higher densities on host plants grown in monocultures than those in diverse environments. The underlying mechanisms are thought to be that polyphagous insects have difficulty in selecting food or oviposition sites when multiple host plants exist. However, this hypothesis needs to be extensively investigated. Our field experiments revealed that the population of the ...
The rice stink bug, Oebalus pugnax (Fabricius) (Hemiptera: Pentatomidae: Carpocorini), though graminaceous, discriminates among its numerous host grass species. This could represent a feeding preference, it could be related to host suitability for growth and development. To clarify the role of host grass discrimination, two laboratory studies were conducted: (1) free-choice tests to evaluate pr...
Abstract Mistletoes have much higher transpiration rates than their hosts. This is the basis for ecological “compatibility hypothesis” host choice. The inability of mistletoes to penetrate a and connect its vascular system competing “immunity hypothesis”. Epi‐parasites would transpire faster mistletoe, which must host. Therefore, epi‐parasites should be able parasitise host's I surveyed epi‐par...
the 1965 washington convention on the settlement of investment disputes between states and nationals of other states created international center for settlement of investment disputes (icsid). this center conducts investment disputes arbitration according to the rules of the convention. the choice of law rules of the washington convention have been provided in article 42. second sentence of art...
Malaria transmission is dependent on the propensity of Anopheles mosquitoes to bite humans (anthropophily) instead of other dead end hosts. Recent increases in the usage of Long Lasting Insecticide Treated Nets (LLINs) in Africa have been associated with reductions in highly anthropophilic and endophilic vectors such as Anopheles gambiae s.s., leaving species with a broader host range, such as ...
the pea aphid, acyrthosiphon pisum (harris) is one of the most important pests of pea throughout the world.host stage preference under choice and no-choice tests and age-specific functional response of praon volucre (haliday) parasitizing a. pisum were investigated. the experiments were carried out under laboratory conditions at 25 ± 1 °c, 60 ± 5% rh and a photoperiod of 14: 10 h (l: d). functi...
Larvae of most butterfly species feed on a limited number of host species belonging to a single plant family. The choice of host plants is determined both at the egg-laying and larval-feeding stages (Schoonhoven et al., 1998). The choice of oviposition site by an adult female is crucial to the survival of their offspring, and thus the mother butterflies lay their eggs with great precision on th...
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