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Wyszukujesz frazę "Bulgaria" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Successful application of the baculovirus product Madex for control of Cydia pomonella (L.) in Bulgaria
Autorzy:
Kutinkova, H.
Samietz, J.
Dzhuvinov, V.
Zingg, D.
Kessler, P.
Powiązania:
https://bibliotekanauki.pl/articles/65939.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application
baculovirus
codling moth
Madex product
control
Cydia pomonella
apple orchard
Bulgaria
flight dynamics
fruit damage
Opis:
The codling moth (CM), Cydia pomonella (L.), causes heavy damage in Bulgarian apple orchards. Conventionally treated orchards, were monitored in this study. In spite of numerous chemical treatments, these orchards showed increasing flight densities of CM moths, growing populations of hibernating larvae and rising fruit damage rates. Thus, the control of CM by conventional spraying programmes became ineffective, apparently due to the development of resistance to insecticides. Products based on the Cydia pomonella granulosis virus (CpGV), such as Madex®, may provide alternative control tools that can be applied with other approaches, for a sustainable control strategy. The trials were carried out in Central-South and South-East Bulgaria, in 2006-2010. Four treatments of Madex® against the first generation, and six treatments against the second generation kept the fruit damage and population density of CM at a low level. Based on the obtained results, different control strategies have been suggested, depending on the initial CM pressure in a particular orchard. Madex® may be a promising alternative to traditional programmes of CM control. Its dose, however, should be adjusted to the initial CM population density. Also, at a high or moderate CM population density Madex® applications should be combined with MD to avoid resistance of CM to granulovirus. At the peak of CM hatching, additional chemical treatments may be sometimes necessary. Such treatments include using insecticides which are still effective against CM.
Źródło:
Journal of Plant Protection Research; 2012, 52, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring methods and prognosis of Opomyza florum Fabr. (Diptera: Opomyzidae) - a pest of wheat in Bulgaria
Autorzy:
Krusteva, H.
Karadjova, O.
Ventislavov, V.
Powiązania:
https://bibliotekanauki.pl/articles/66272.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
monitoring method
prognosis
Opomyza florum
Diptera
Opomyzidae
pest
plant pest
yellow wheat fly
wheat
winter wheat
population density
dynamics
sowing date
Bulgaria
Opis:
The effect of sowing dates on the abundance of Opomyza florum, and the effect of sowing dates on the degree of larvae damage on winter wheat during the 2003-2008 time period was evaluated. The population density of O. florum adults and the damage larvae caused, were higher in the wheat fields sown in the last decade of September and the first half of October. Fields sown during the first decade of November were not infested by O. florum. A significant correlation between the mean temperature during the flight period and the maximum density of O. florum flies within each sowing (r = 0.94; p = 0.016) was established. The percentage of damaged shoots strongly corresponded to the maximum abundance of flies (r = 0.96; p = 0.01). The corresponding figures can be used for prognostic purposes. An adult observation accuracy below 25% was achieved by the sweep net method using 10 samples of 30 sweeps in the beginning of migration and 10 samples of 20 sweeps during the period of the O. florum mass flight. No marginal effect of adults was observed.
Źródło:
Journal of Plant Protection Research; 2012, 52, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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