02355nas a2200193   4500008004100000020001400041245010800055210006900163260000800232300001200240490000700252520165100259653002601910100002301936700002501959700002501984700002202009856013002031       2010                        eng d  a1461-955500aProtected raspberry production accelerates onset of oviposition by vine weevils (Otiorhynchus sulcatus)0 aProtected raspberry production accelerates onset of oviposition   cAug  a277-2830 v123 aSoft fruit production is increasingly reliant on crops that are grown under the protection of plastic tunnels, which may also affect insect communities as a result of localized climate change and changes to host plant physiology and chemistry. In particular, insect development rates may differ from field populations, making it more difficult to target control measures. The present study investigated how protected environments affected adult vine weevil (Otiorhynchus sulcatus) feeding and reproduction on red raspberry (Rubus idaeus). We focused on the period between adult emergence and the onset of oviposition (i.e. the pre-reproductive period), which represents the optimal period for control. Tunnels were up to 4 [degree]C warmer than field plantations in 2008, with plants growing significantly faster (50% increase in height and 16% increase in leaf area) than field grown plants. The carbon/nitrogen ratio in leaves was higher in tunnels (12.07) than the field (10.89) as a result of a significant decrease in nitrogen concentrations (3.40 and 3.90 mg g-1, respectively). Over 4 weeks, weevils consumed significantly more foliage in tunnels (370.89 mg) than weevils in the field (166.68 mg), suggesting compensatory feeding to counteract lower leaf nitrogen concentrations. Weevils in tunnels achieved sexual maturity 8 days earlier than those in the field and produced 20-fold more eggs by the time they were 5 weeks old. Applying a degree-day model showed good agreement between predicted and observed pre-reproductive periods for weevils in tunnels (36 and 30 days, respectively) and in field plots (41 and 38 days, respectively).10aOtiorhynchus sulcatus1 aJohnson, Scott, N.1 aPetitjean, Sebastien1 aClark, Katherine, E.1 aMitchell, Carolyn  uhttps://weevil.myspecies.info/protected-raspberry-production-accelerates-onset-oviposition-vine-weevils-otiorhynchus-sulcatus02661nas a2200229   4500008004100000020001400041245015300055210006900208260000800277300001000285490000700295520181100302100002502113700002302138700002102161700002002182700002602202700002302228700002202251700002302273856013502296       2012                        eng d  a0261-219400aEffects of cultivar and egg density on a colonizing vine weevil (Otiorhynchus sulcatus) population and its impacts on red raspberry growth and yield0 aEffects of cultivar and egg density on a colonizing vine weevil   cFeb  a76-820 v323 aBlack vine weevil (Otiorhynchus sulcatus) is regarded as a damaging pest of horticultural crops, yet empirical data about its population dynamics and effects on crop yield are largely lacking. This paper reports a four year (2007-2010) field study that simulated colonisation by O. sulcatus in a red raspberry (Rubus idaeus) plantation comprising two cultivars (Glen Ample and Glen Rosa). The study tested whether adult O. sulcatus abundance was affected by cultivar or original egg distribution. Total population estimates were also made using mark and recapture methods. Finally, the effects of O. sulcatus on plant growth and berry yield were quantified. O. sulcatus abundance was significantly higher on Glen Ample than Glen Rosa, with the difference becoming even greater in 2009 compared to 2008. The abundance of O. sulcatus adults on particular plants was not related to original egg density. Mark and recapture based estimates suggested that the overall O. sulcatus population reached 3500 in 2008 and 44,100 in 2009. O. sulcatus abundance on plants was negatively related to plant height. Comparing plants with greatest and lowest O. sulcatus burdens showed that the heavily infested plants had lower shoot and root biomass in both Glen Ample (62% and 60%, respectively) and Glen Rosa (50% and 12%, respectively), significantly smaller berries (5.1 g and 2.8 g, respectively, in Glen Ample and 3.3 g and 2.7 g, respectively, in Glen Rosa) and smaller yields (2.93 kg and 0.99 kg in Glen Ample and 2.80 kg-1.71 kg in Glen Rosa, respectively). While cane fruits like raspberry were thought to tolerate O. sulcatus attack due to extensive root systems, this study suggests that damage can be extensive, particularly on cultivars such as Glen Ample. [copyright]2011 Elsevier Ltd. All rights reserved.1 aClark, Katherine, E.1 aHartley, Susan, E.1 aBrennan, Rex, M.1 aJennings, Nikki1 aMcMenemy, Lindsay, S.1 aMcNicol, James, W.1 aMitchell, Carolyn1 aJohnson, Scott, N.  uhttps://weevil.myspecies.info/effects-cultivar-and-egg-density-colonizing-vine-weevil-otiorhynchus-sulcatus-population-and-its-imp