01424nas a2200169   4500008004100000020001400041245009300055210006900148260000900217300001200226490000700238520084500245653001901090100001701109700001501126856011301141       2007                        eng d  a1175-900300aInfluence of trap colour, design and height on catch of flying clover root weevil adults0 aInfluence of trap colour design and height on catch of flying cl  c2007  a217-2220 v603 aAdult clover root weevil (Sitona lepidus, CRW) catches on sticky traps of different colours, design and height were evaluated in two field experiments carried out on the outskirts of Hamilton in the summer of 1999-2000. In Experiment 1, yellow cylinder traps placed at a height of 1200 mm caught the most CRW. In Experiment 2, both white and yellow cylinder traps placed at a height of 1200 mm were equally attractive to CRW adults. In both experiments, fewer CRW adults were caught on cylinder traps of all colours set 400 mm above the ground. Cylinder traps painted red, green and blue and set 1200 mm above the ground caught similar numbers of insects to traps of all colours set at 400 mm. In Experiment 2, flat traps with a sticky surface that was parallel to the ground caught very few weevils irrespective of their colour and height.10aSitona lepidus1 aHardwick, S.1 aHarens, B.  uhttps://weevil.myspecies.info/influence-trap-colour-design-and-height-catch-flying-clover-root-weevil-adults01595nas a2200193   4500008004100000020001400041245005600055210005600111260000900167300001200176490000700188520102400195653002401219100001901243700001401262700001901276700002001295856008601315       2007                        eng d  a1175-900300aInteractions between nodding thistle seed predators0 aInteractions between nodding thistle seed predators  c2007  a152-1570 v603 aThe biological control program against nodding thistle, Carduus nutans, commenced in New Zealand in 1972, with the introduction of the receptacle weevil, Rhinocyllus conicus. Seed predation by the larvae of this univoltine weevil did not bring about the desired reduction in nodding thistle populations, and in 1992 a further seed predator was introduced - the bivoltine gall fly, Urophora solstitialis. Possible interference between these two niche-sharing agents may have resulted in less-than-additive seed predation. This recent study quantified the interactions between the two agents for the first time in New Zealand, and found the mean number of gall flies per seedhead was reduced by 46-93% in the presence of the receptacle weevil. This suggests that the weevil may limit the gall fly's populations, thus reducing seed predation later in the nodding thistle flowering period. The potential effects of this reduced attack on nodding thistle population growth rate were simulated using an existing matrix model.10aRhinocyllus conicus1 aGroenteman, R.1 aKelly, D.1 aFowler, S., V.1 aBourdot, G., W.  uhttps://weevil.myspecies.info/interactions-between-nodding-thistle-seed-predators01671nas a2200193   4500008004500000020001400045245009500059210006900154260000900223300001000232490000700242520102900249653001901278100001901297700001701316700001901333700001401352856011101366       2008                        Engldsh    a1175-900300aDistribution ot the clover root weevil biocontrol agent in the North Island of New Zealand0 aDistribution ot the clover root weevil biocontrol agent in the N  c2008  a24-300 v613 aThe Irish wasp Microctonus aethiopoides was released in 2006 as a biocontrol agent for the clover root weevil Sitona lepidus, a serious pest of white clover in New Zealand. Following successful establishment, two strategies were implemented to accelerate the widespread establishment of the parasitoid throughout the North Island. The first approach was the establishment of regional nursery sites that act as point Sources for natural and assisted dispersal. With the assistance of Regional Councils and major landowners, these were set up at sites favourable to the wasp, and local people were provided the training and support to undertake collections and distribution of parasitized weevils. Secondly, samples of parasitized weevils were distributed for release directly to farmers through pastoral industry networks and events. Initial results indicate that while the parasitoid established rapidly at Taranaki and Waikato nursery sites as anticipated, it has failed to establish in Northland in two successive seasons.10aSitona lepidus1 aGerard, P., J.1 aEden, T., M.1 aWilson, D., J.1 aBurch, G.  uhttps://weevil.myspecies.info/distribution-ot-clover-root-weevil-biocontrol-agent-north-island-new-zealand01403nas a2200181   4500008004100000020001400041245010700055210006900162260000900231300001000240490000700250520077400257653002201031100001701053700001501070700001301085856012301098       2009                        eng d  a1175-900300aInfluence of male density on the courtship and mating duration of male rice weevils, Sitophilus oryzae0 aInfluence of male density on the courtship and mating duration o  c2009  a76-790 v623 aThe rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae) is a major pest of stored grains throughout the world. This experiment examined the capacity of male S. oryzae to adjust their mating behaviour in response to male density (i.e. 1, 5 and 10 males) maintained with a single female. Results show that males spent less time in courting females with antennal contact at density 1 when compared to densities 5 and 10. Copulation duration increased in response to the increase in rival densities. The mechanism behind this phenomenon may be (1) a mate guarding strategy to enhance reproductive success by reducing the chance of sperm displacement by competitors and (2) a strategy to avoid damage to the reproductive organs of their mates by multiple mating.10aSitophilus oryzae1 aFlay, C., D.1 aHe, X., Z.1 aWang, Q.  uhttps://weevil.myspecies.info/influence-male-density-courtship-and-mating-duration-male-rice-weevils-sitophilus-oryzae01490nas a2200181   4500008004100000020001400041245010200055210006900157260000900226300001200235490000700247520086900254653002201123100001701145700001501162700001301177856011801190       2010                        eng d  a1175-900300aInfluence of multiple mating on female reproductive fitness in the rice weevil, Sitophilus oryzae0 aInfluence of multiple mating on female reproductive fitness in t  c2010  a201-2070 v633 aThe rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae), is an important pest of stored grains throughout the world. This paper examined how multiple mating affected female reproductive fitness in the laboratory. Over 60 days, females that permanently paired with males, mated twice with different males or four times with the same males did not suffer from significant decline of offspring survival, while females mated once, twice with the same males and four times with different males had significant declines. It is suggested that mating once or twice with the same males is not enough for females to maximise their reproductive fitness. The significant decline of offspring survival in females that mated with four different males may be caused by reproductive organ damage or other factors that reduce their fertility due to excessive polyandry.10aSitophilus oryzae1 aFlay, C., D.1 aHe, X., Z.1 aWang, Q.  uhttps://weevil.myspecies.info/influence-multiple-mating-female-reproductive-fitness-rice-weevil-sitophilus-oryzae01604nas a2200181   4500008004500000020001400045245006900059210006500128260000900193300001000202490000700212520104400219653001901263100001701282700001501299700001901314856008901333       2008                        Engldsh    a1175-900300aThe effect of parasitism on clover root weevil flight capability0 aeffect of parasitism on clover root weevil flight capability  c2008  a31-340 v613 aThe Irish strain of Microctonus aethiopoides was released in New Zealand in 2006 to help suppress populations of the clover pest, clover root weevil (Sitona lepidus). A study was undertaken to determine if this parasitoid will be passively dispersed through flight activity by parasitized hosts. In the laboratory, Irish M. aethiopoides parasitized equally hosts with or without flight muscles and subsequent presence of parasitoid eggs or first instar larvae had no effect on the propensity for S. lepidus to prepare to take flight during laboratory observations. In the field, significantly fewer clover root weevil with flight muscles were found to be parasitized compared to those without flight muscles, and those that were parasitized contained predominantly eggs and first instar larvae. The results were compared with other Microctonus biocontrol agents released in New Zealand and it was concluded that passive dispersal should play a major role in dispersing Irish M. aethiopoides in New Zealand, especially in warm, dry summers.10aSitona lepidus1 aEden, T., M.1 aDonald, M.1 aGerard, P., J.  uhttps://weevil.myspecies.info/effect-parasitism-clover-root-weevil-flight-capability00628nas a2200133   4500008004100000245017200041210006900213300001200282490000700294100001700301700002000318700002100338856013500359       2002                        eng d00aField parasitism of Rhinocyllus conicus Froehlich (Coleoptera: Curculionidae) by Microctonus aethiopoides Loan (Hymenoptera: Braconidae) in Otago and South Canterbury.0 aField parasitism of Rhinocyllus conicus Froehlich Coleoptera Cur  a263-2660 v551 aMurray, T.J.1 aBarrett, B.I.P.1 aFerguson, C., M.  uhttps://weevil.myspecies.info/field-parasitism-rhinocyllus-conicus-froehlich-coleoptera-curculionidae-microctonus-aethiopoides-loa