نتایج جستجو برای: parasitic egg

تعداد نتایج: 75797  

2012
Nina E. Fatouros Dani Lucas-Barbosa Berhane T. Weldegergis Foteini G. Pashalidou Joop J. A. van Loon Marcel Dicke Jeffrey A. Harvey Rieta Gols Martinus E. Huigens

Plants release volatiles induced by herbivore feeding that may affect the diversity and composition of plant-associated arthropod communities. However, the specificity and role of plant volatiles induced during the early phase of attack, i.e. egg deposition by herbivorous insects, and their consequences on insects of different trophic levels remain poorly explored. In olfactometer and wind tunn...

Journal: :Journal of Dairying, Foods & Home Sciences 2022

Background: Parasitic infestation is a major constraint in sheep husbandry and this condition results over usage of antihelminths leads to drug resistance presence residues meat. To counteract problem use tanniferous leaves promising approach both terms health animals decreasing the economic burden on farmer. Methods: A total 30 Nellore brown lambs aged 3-4 months with mean live weight 12.10±0....

1995
ARNON LOTEM HIROSHI NAKAMURA

To understand the co-existence of rejection and acceptance of cuckoo eggs within a host population, the mechanism of egg discrimination and the cost–benefit balance of rejection behaviour were investigated. At a study site in central Japan, rejection rate of cuckoo, Cuculus canorus, eggs by great reed warblers, Acrocephalus arundinaceus, was 61·5%. An analysis of host response to natural and ex...

Journal: :Poultry science 2011
S Nowaczewski K Stuper T Szablewski H Kontecka

Pheasant eggs of different colors differ with regard to physical properties. This study was conducted to ascertain the intensity of infestation by microscopic fungi based on egg color. Settling intensity by microscopic fungi of pheasant egg shells and the content of eggs of different color during a 7-d storage period was investigated. The content of ergosterol (ERG) was used as a quantitative i...

2009
K. De Reu T. B. Rodenburg K. Grijspeerdt M. Heyndrickx F.A.M. Tuyttens J. Zoons L. Herman

Institute for Agricultural and Fisheries Research, Technology and Food Unit, Brusselsesteenweg 370, 9090 Melle, Belgium; Animal Breeding and Genomics Centre, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands; Institute for Agricultural and Fisheries Research, Animal Science Unit, Scheldeweg 68, 9090 Melle, Belgium; Provincial Centre for Applied Poultry Research, Poiel 77,...

Journal: :Ecology letters 2011
Amanuel Tamiru Toby J A Bruce Christine M Woodcock John C Caulfield Charles A O Midega Callistus K P O Ogol Patrick Mayon Michael A Birkett John A Pickett Zeyaur R Khan

Natural enemies respond to herbivore-induced plant volatiles (HIPVs), but an often overlooked aspect is that there may be genotypic variation in these 'indirect' plant defence traits within plant species. We found that egg deposition by stemborer moths (Chilo partellus) on maize landrace varieties caused emission of HIPVs that attract parasitic wasps. Notably, however, the oviposition-induced r...

Journal: :Journal of nematology 1980
R N Inserra N Vovlas

Rotylenchulus macrodoratus completed its embryogenic development in about 16-19 days at 18-32 C. On olive seedlings the life-cycle from egg to egg was completed in 45-55 days. The first molt occurred in the egg while the other three were superimposed, with retention of successive larval cuticles. Only immature vermiform and swollen egg-laying females were found attached to olive roots. Eggs are...

Journal: :Journal of nematology 1975
G Fassuliotis

Feeding and egg-laying of Hoplolaimus columbus were observed on excised alfalfa (cultivar 'DuPuits') root cultures in 1.0% nutrient agar. Feeding was ectoparasitic on cortical cells in the maturation zone of the root. Oocytes were first observed in the anterior ovary of the feeding female 8-9 days after feeding began. Globular secretions emanating from the vagina and vulva preceded migration of...

Journal: :Proceedings. Biological sciences 2015
Iliana Medina Naomi E Langmore

Coevolution is often invoked as an engine of biological diversity. Avian brood parasites and their hosts provide one of the best-known examples of coevolution. Brood parasites lay their eggs in the nests of other species, selecting for host defences and reciprocal counteradaptations in parasites. In theory, this arms race should promote increased rates of speciation and phenotypic evolution. He...

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