Behavioural and electrophysiological responses of grape berry moth (Lep., Tortricidae) to selected plant extracts

Abstract

Four non-host plant extracts from Bifora radians, Arctium lappa, Humulus lupulus and Xanthium strumarium, were tested against adult grape berry moths, Paralobesia viteana, for their potential as repellents or oviposition deterrents. Responses were compared with those elicited by the major component of the P. viteana sex pheromone. Moths of both sexes exhibited varying electroantennogram (EAG) responses from 1.7 to 2.4 mV to volatile odours from plant extracts, with the greatest response to extracts of H. lupulus (2.4 mV). A multi-arm olfactometer was used to assay the behavioural response of moths to the same treatments. Male moths responded significantly to H. lupulus extract, although their strongest response was to the sex pheromone (30.0%). Female moths showed no behavioural response to the sex pheromone, attracting only 6.7% of moths, but they were attracted to extracts of H. lupulus, X. strumarium and A. lappa, with 25.0%, 21.7% and 15.0% of the released insects responding to these treatments, respectively. Choice tests were conducted to compare oviposition by P. viteana on untreated grapes and on grapes treated with one of the extracts. Despite the attraction in the olfactometer assays, H. lupulus extract significantly reduced egg laying; only 12.5% of the total deposited eggs were laid on berries treated with this extract. The extract of B. radians provided complete protection against oviposition.

Comparative behavioral and EAG responses of female obliquebanded and redbanded leafroller moths (Lepidoptera: Tortricidae) to their sex pheromone components

“…"Autodetection" Ochieng et al, 1995), known as antennal sensitivity of female moths to their sex pheromone components, is considered to be less common among moth species in general than female anosmia to their sex pheromone. However, among tortricids, in those instances where female moths have been investigated, they are capable of detecting their pheromone (Palanaswamy & Seabrook, 1978Noguchi & Tamaki 1985;Barnes et al, 1992;Weissling & Knight, 1996;DeLury et al, 2005;Gökçe et al, 2006;Stelinski et al, 2006). To our knowledge, there are no published reports describing female anosmia to their sex pheromone in a tortricid species.…”

“…It is known that females of many tortricid species are capable of detecting their sex pheromone (Palanaswamy & Seabrook, 1978;Barnes et al, 1992;Stelinski at el., 2003cStelinski at el., , 2006DeLury et al, 2005;Gökçe et al, 2006). In addition to tortricid moths, noctuid (Mitchell et al, 1972;Birch, 1977;Light & Birch, 1979;Ljungberg et al, 1993;Groot et al, 2005), yponomeutid (van der Pers & den Otter, 1978), and arctiid (Schneider et al, 1998) females are reported to be capable of detecting their sex pheromone.…”

Phenology and Infestation Patterns of Plum Curculio (Coleoptera: Curculionidae) on Four Highbush Blueberry Cultivars

“…Determining the specific mechanism(s) that modify plum curculio behavior with these plant extracts will be important in our subsequent research. However, previous experiments suggest both repellency and oviposition deterrence as modes of action of these plant-based extracts (Gökçe et al 2005(Gökçe et al , 2006a(Gökçe et al , 2006b(Gökçe et al , 2010.…”

“…Also, organic growers have very few tools other than pyrethrum (Grieshop et al 2010) for plum curculio and other orchard pests. Therefore, this research explored a range of other plant extracts ( (Gökçe et al 2005(Gökçe et al , 2006a(Gökçe et al , 2006b(Gökçe et al , 2010. All of these plants occur naturally in the USA, so demonstration of their utility to growers could lead to implementation of various organic plant mixtures as a relatively inexpensive addition to plum curculio management.…”

Bitki ekstraktlarının Sera beyazsineği [Trialeurodes vaporariorum (Westw.) (Hemiptera: Aleyrodidae)]'ne toksik ve davranışsal etkileri

“…Bu bitkinin ekstraktı ile ile muamele edilmiş üzüm danelerine P. viteana ya çok az ya da hiç yumurta bırakmadığı saptanmıştır. (Gökçe et al, 2006c Bu çalışma sonucunda H. niger ve H. lupulus' un sera beyazsineğinin 3. dönem nimf ve ergin dönemlerinde yüksek oranda kontak toksisite gösterdiği ve bu etkilerinin bir bitki kökenli insektisit piretrin ile kıyaslanabilir nitelikte olduğu ortaya konulmuştur. H. lupulus bitkisinin kontak toksisitesinin yanında ergin beyaz sinekler üzerinde olan uzaklaştırıcı ve yumurta bırakmayı engelleyici etkisi, bu bitkinin entegre mücadele çalışmalarında farklı amaçlar için kullanılma potansiyelini artırmaktadır.…”