01509nas a2200157   4500008004100000020001400041245011600055210006900171260000900240300001200249490000700261520090800268653002101176100002301197856013101220       2010                        eng d  a1427-433700aResponse of large pine weevil (Hylobius abietis L.) beetles to insecticides with different mechanisms of action0 aResponse of large pine weevil Hylobius abietis L beetles to inse  c2010  a149-1570 v503 aResponses (knock-down and mortality) of large pine weevil (Hylobius abietis L.) beetles to insecticides of different mechanism of action such as neonicotinoids (clotianidin, acetamiprid) acting on nicotinic receptors of acetylcholine (ACh), pyrethroids (deltamethrin, [alpha]-cypermethrin) blocking sodium channels in nerve cell membranes, organophosphates (chlorpiryfos) and carbamates (carbosulfan) both inhibiting acetylcholinesterase (AChE) activity and fenylpirazoles (fipronil) interfering with a-butyric acid (GABA) receptors were studied. Taking into account speed of insect decay the order of examined groups of substances may be established as follows: first place is occupied by insecticides interferring with GABA receptors, second place by insecticides blocking AChE activity, and third place in parallel insecticides blocking sodium channels and those acting on nicotinic receptors of ACh.10aHylobius abietis1 aMalinowski, Henryk  uhttps://weevil.myspecies.info/response-large-pine-weevil-hylobius-abietis-l-beetles-insecticides-different-mechanisms-action-001507nas a2200157   4500008004100000020001400041245011600055210006900171260000900240300001200249490000700261520090800268653002101176100002301197856012901220       2010                        eng d  a1427-433700aResponse of large pine weevil (Hylobius abietis L.) beetles to insecticides with different mechanisms of action0 aResponse of large pine weevil Hylobius abietis L beetles to inse  c2010  a149-1570 v503 aResponses (knock-down and mortality) of large pine weevil (Hylobius abietis L.) beetles to insecticides of different mechanism of action such as neonicotinoids (clotianidin, acetamiprid) acting on nicotinic receptors of acetylcholine (ACh), pyrethroids (deltamethrin, [alpha]-cypermethrin) blocking sodium channels in nerve cell membranes, organophosphates (chlorpiryfos) and carbamates (carbosulfan) both inhibiting acetylcholinesterase (AChE) activity and fenylpirazoles (fipronil) interfering with a-butyric acid (GABA) receptors were studied. Taking into account speed of insect decay the order of examined groups of substances may be established as follows: first place is occupied by insecticides interferring with GABA receptors, second place by insecticides blocking AChE activity, and third place in parallel insecticides blocking sodium channels and those acting on nicotinic receptors of ACh.10aHylobius abietis1 aMalinowski, Henryk  uhttps://weevil.myspecies.info/response-large-pine-weevil-hylobius-abietis-l-beetles-insecticides-different-mechanisms-action02123nas a2200193   4500008004100000020001400041245016600055210006900221260000800290300001200298490000800310520138200318653002101700100002001721700001401741700001901755700002001774856013501794       2010                        eng d  a0022-201100aThe lethal and sub-lethal consequences of entomopathogenic nematode infestation and exposure for adult pine weevils, Hylobius abietis (Coleoptera: Curculionidae)0 alethal and sublethal consequences of entomopathogenic nematode i  cJul  a195-2020 v1043 aEntomopathogenic nematodes (EPN) frequently kill their host within 1-2 days, and interest in EPN focuses mainly on their lethality. However, insects may take longer to die, or may fail to die despite being infected, but little is known about the effects of EPN infection on insects, other than death. Here we investigate both lethal and sub-lethal effects of infection by two EPN species, Steinernema carpocapsae and Heterorhabditis downesi, on adults of the large pine weevil, Hylobius abietis. Following 12 h nematode-weevil contact in peat, S. carpocapsae killed a significantly higher proportion of weevils (87-93%) than H. downesi (43-57%) at all concentrations tested. Less than 10% of weevils were dead within 2 days, and weevils continued to die for up to 10 days after exposure (LT50 of 3 days or more). In a separate experiment, live weevils dissected 6 days after a 24 h exposure to nematodes on filter paper harbored encapsulated and dead nematodes, showing that weevils could defend themselves against infection. Some live weevils also harbored live nematodes 6 days after they had been removed from the nematode infested medium. Feeding by weevils was not affected by infection with, or exposure to, either species of EPN. We discuss these results in relation to the use of EPN in biological control against H. abietis. (C) 2010 Elsevier Inc. All rights reserved.10aHylobius abietis1 aGirling, R., D.1 aEnnis, D.1 aDillon, A., B.1 aGriffin, C., T.  uhttps://weevil.myspecies.info/lethal-and-sub-lethal-consequences-entomopathogenic-nematode-infestation-and-exposure-adult-pine-wee02127nas a2200181   4500008004100000020002500041245009400066210006900160260000800229300001200237490000700249520148100256653002101737100002301758700002201781700002701803856011501830       2010                        eng d  a0003-3472; 1095-828200aPine weevils modulate defensive behaviour in response to parasites of differing virulence0 aPine weevils modulate defensive behaviour in response to parasit  cAug  a283-2880 v803 aGrooming and avoidance of contaminated areas are among the behavioural defences employed by animals against parasites. Antiparasite defence behaviour is costly in terms of time, energy and/or food foregone and therefore animals are expected to modulate their defences depending on the risk of attack and/or the severity of the symptoms caused. We tested the hypothesis that an insect host invests more in defence against more virulent (more likely to cause death) than less virulent parasites. We tested avoidance and grooming of adult pine weevils, Hylobius abietis, in response to infective juveniles of two species of entomopathogenic nematodes, the more virulent Steinernema carpocapsae and less virulent Heterorhabditis downesi. Weevils avoided feeding on a substrate contaminated with S. carpocapsae but not H. downesi. Weevils also groomed more when their bodies were contaminated with S. carpocapsae than either H. downesi or water. We also made direct observations of nematodes on weevils. When equal numbers of nematodes were applied to weevils more S. carpocapsae than H. downesi moved actively on the weevil's cuticle. Thus, the differential response of weevils to the two nematode species can be explained by the weevils detecting the more aggressive behaviour of S. carpocapsae than H. downesi, which corresponds to a higher probability of death. [copyright] 2010 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.10aHylobius abietis1 aEnnis, Darragh, E.1 aDillon, Aoife, B.1 aGriffin, Christine, T.  uhttps://weevil.myspecies.info/pine-weevils-modulate-defensive-behaviour-response-parasites-differing-virulence