Results 71 to 80 of about 105,801 (341)

Clear effects of population and sex but not rearing temperature on stress tolerance in a temperate butterfly

Oikos, EarlyView.
With temperatures rising globally due to climate change, an organism's survival depends both on its direct tolerance to rising temperatures and its tolerance to indirect effects of warming, such as resource shortage. Genetic background and phenotypic plasticity in the form of acclimation are known to affect stress tolerance, but much about genetic ...
Nadja Verspagen, Michelle F. DiLeo, Marjo Saastamoinen   +2 more
wiley   +1 more source

Development of the solitary larval endoparasitoid Glyptapanteles porthetriae (Hymenoptera: Braconidae) in its host Lymantria dispar (Lepidoptera: Lymantriidae)

European Journal of Entomology, 2000
The development of the solitary endoparasitic braconid Glyptapanteles porthetriae in gypsy moth larvae of different ages was studied. Host larvae were parasitized during the premolt to the 2nd instar (A-larvae), to the 3rd instar (B-larvae) or to the 4th
Christa NUSSBAUMER, Axel SCHOPF
doaj   +1 more source

Unapparent trees: escaping enemies in time by being discreet, unpredictable and inaccessible

Oikos, EarlyView.
For half a century, biologists considered trees as particularly apparent to their enemies. But why then do some trees escape herbivorous enemies by bursting buds either too early or too late, leading to phenological mismatch? We hypothesize that such mismatches occur on trees that are unapparent in time – those that burst buds ‘discreetly' (slowly) and
Soumen Mallick, Freerk Molleman, Benjamin Yguel, Jörg Müller, Romain Georges, Stéphanie Llopis, Marjorie Levant, Frédéric Jean, Yasin Gundesli, Jaad Besse, Agnès Schermann‐Legionnet, Andreas Prinzing   +11 more
wiley   +1 more source

BIOLOGÍA DE Diomus sp (Coleoptera: Coccinelidae) EN CONDICIONES DE LABORATORIO Y OBSERVACIONES SOBRE SU MORFOLOGÍA

Tecnociencia, 2007
     Existen pocos estudios básicos sobre biología de coccinélidos depredadores de áfidos y su potencial como agentes de control biológico. El propósito de este estudio fue establecer la biología de Diomus sp (Coleoptera: Coccinellidae) como depredador ...
Alex Aguilar, Daniel Emmen, Dora Quiros
doaj  

Exploring reversibility and contrasting patterns in temperature–size relationships across spatial and temporal scales using subfossil chironomids

Oikos, EarlyView.
The extent to which different magnitudes and directions of temperature fluctuations explain long‐term trends in aquatic invertebrate body size is largely unknown. Using elevational gradients and paleolimnological reconstructions, we tested the hypotheses that the size of subfossil chironomid (non‐biting midges) head capsules (HCs) will covary with ...
Simon Belle, Tymoteusz Matera, Merlin Liiv, Normunds Stivrins, Anneli Poska, Atko Heinsalu, Brendan G. Mckie   +6 more
wiley   +1 more source

Cumulative effect of HaNPV against Helicoverpa armigera infesting Chickpea

Environment Conservation Journal, 2016
The instar-wise larval mortality in H. armigera due to HaNPV @ 0.500 ml/l showed a consistent decrease in all the five instars and cent per cent larval mortality was recorded in the first instar larvae.
C. Divya, D. M. Jethva, H. G. Kanara
doaj   +1 more source

Lessons learned exploiting a multi‐year large‐scale data set derived from operational quality assessment of mosquito larval treatments in rain catch basins

Pest Management Science, EarlyView.
Results highlight opposite associations between percentages of positive rain catch basins treated with diflubenzuron and Bacillus against mosquito larvae and/or pupae and the intervals between treatments and inspections, and spatial variability in vector control.
Chiara Virgillito, Eleonora Longo, Silvia Paolucci, Martina Micocci, Mattia Manica, Federico Filipponi, Stefano Vettore, Davide Bonetto, Andrea Drago, Simone Martini, Alessandra Della Torre, Beniamino Caputo   +11 more
wiley   +1 more source

Prey Preference of the Predatory Mite, Amblyseius swirskii between First Instar Western Flower Thrips Frankliniella occidentalis and Nymphs of the Twospotted Spider Mite Tetranychus urticae

Journal of Insect Science, 2010
The prey preference of polyphagous predators plays an important role in suppressing different species of pest insects. In this study the prey preference of the predatory mite, Amblyseius swirskii (Athias-Henriot) (Acari: Phytoseiidae) was examined ...
Xuenong Xu, A. Enkegaard
semanticscholar   +1 more source

Defining the parameters of comet assay for reliably detecting DNA damage as a marker of X‐ray based irradiation in insects treated with non‐lethal doses for export fruit sanitation

Pest Management Science, EarlyView.
Houseflies, clover root weevils, and mangoes were used to demonstrate the comet assay's adaptability. Our findings indicate that the comet assay can reliably detect irradiation‐induced DNA damage in both insects and fruit. However, the assay parameters require careful adjustment to account for differences in insect tissue types and life stages ...
Ela Hiszczynska‐Sawicka, Nicola K. Richards, Jill L. Gibson, Chikako van Koten, Disna Gunawardana, Karen F. Armstrong   +5 more
wiley   +1 more source

Numerical Reduction of Instars in the Metamorphosis of Euphausids [PDF]

Nature, 1926
THE development of an animal from the zygote up to the adult condition is usually accompanied by a more or less regular and continuous increase in size. In the case of the Arthropoda, however, the enclosure of the body in a hard inextensible layer of chitin renders this impossible, and in accordance with this the chitinous exoskeleton is shed from time
openaire   +2 more sources