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Kartulimardika (Leptinotarsa decemlineata Say) populatsiooni arvukuse prognoosi võimalikkus Eestis

dc.contributor.authorHiiesaar, Külli
dc.contributor.authorEremeev, Viacheslav
dc.contributor.authorWilliams, Ingrid H.
dc.contributor.departmentEstonian University of Life Sciences. Institute of Agricultural and Environmental Scienceseng
dc.date.accessioned2017-06-09T07:26:38Z
dc.date.available2017-06-09T07:26:38Z
dc.date.issued2017
dc.descriptionSaabunud / Received 22.12.16 ; Aktsepteeritud / Accepted 10.03.17 ; Avaldatud veebis / Published online 20.03.17 ; Vastutav autor / Corresponding author: Külli Hiiesaar ; e-mail: kylli.hiiesaar@emu.eeeng
dc.description.abstractOn the basis of phenological observations and overwintering mortality data in 2015/2016 we tried to predict the population density of Colorado potato beetle (Leptinotarsa decemlineata Say) (CPB) for the following season. Because of the late and cool spring in 2015, the beetles started to emerge from the soil at the end of May and, because of the low temperatures, did not start to reproduce immediately. The first egg clutches did not appear until the end of June. The low density of larvae and beetles in mid-summer lead us to expect low damage for the whole season. However, very warm weather in August and September induced the beetles to lay eggs and the population density increased sharply. A lot of the summer beetles managed to terminate their development in time and to dig into the soil for overwintering. Consequently, we expected the beetles to be abundant the following spring. However, a short, snowless, very cold period in January when air temperature fell to –30 °C and soil temperature to –6.6 °C nullified this prediction as over 90% of overwintering beetles perished. In spring 2016, very few beetles were found on the field and the potato plants remained undamaged until the end of June. Then, due to south-east storms at the end of June, very large migrations occurred and, some weeks later, various development stages of CPB were very abundant in potato fields. Thus, none of our predictions came true. The main reason for this was our extremely unstable weather conditions during summer and the overwintering period and the unpredictable large migrations from southern regions.eng
dc.identifier.issn2228-4893
dc.identifier.publicationAgraarteadus : Journal of Agricultural Science, 2017, vol. 28, no. 1, pp. 13-18eng
dc.identifier.urihttp://hdl.handle.net/10492/3593
dc.identifier.urihttp://agrt.emu.ee/pdf/2017_1_hiiesaar.pdf
dc.identifier.urihttp://dx.doi.org/10.15159/jas.17.01
dc.publisherEstonian Academic Agricultural Societyeng
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.rights.holderAuthors of accepted articles retain all rights to use, reuse, and distribute the published research as long as the author credits the original publication in this journal. The authors submitting to the journal are expected to follow the general ethical guidelines regarding plagiarism. If in doubt consult the ICMJ guidelines on overlapping publications. Once accepted the journal retain the right to print and distribute the manuscript submitted by the author.eng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectpopulation densityeng
dc.subjectpredictioneng
dc.subjectphenologyeng
dc.subjectoverwinteringeng
dc.subjectweather conditionseng
dc.subjectarticleseng
dc.titleKartulimardika (Leptinotarsa decemlineata Say) populatsiooni arvukuse prognoosi võimalikkus Eestisest
dc.title.alternativeThe reliability of colorado potato beetles (Leptinotarsa decemlineata Say) population density predictions based on phenological and overwintering dataeng
dc.typeArticleeng

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