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SM ISO690:2012 ELISOVETSKAYA , Dina, DERJANSCHI, Valeriu. Hibernation of the predatory stink bug Perillus bioculatus F. (Hemiptera, Pentatomidae) under laboratory conditions. In: Oltenia - studii si comunicari stiintele naturii, 2016, nr. 1(32), pp. 67-70. ISSN 1454-6914. |
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Oltenia - studii si comunicari stiintele naturii | ||||||
Numărul 1(32) / 2016 / ISSN 1454-6914 | ||||||
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CZU: 595.754:591.5:59.08 | ||||||
Pag. 67-70 | ||||||
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Observations of the laboratory population of predatory bug Perillus bioculatus allowed us to establish the time periods and duration of the winter diapause. The imagoes of the 2nd and 3rd generations of the predator proved to be more adapted, while the 4th generation adults of P. bioculatus were most vulnerable during hibernation. The mortality rate of P. bioculatus individuals in the period from December 15 to March 15 was 12.2; 28.6 and 30.1% for the 2nd, 3rd and 4th generations, respectively. At the same time, the sex ratio (♀ : ♂) was distributed as follows: before the wintering of the 2nd generation – 1:2.9, 3rd – 1:1.3, and 4th – 1:1.4; after coming out of hibernation – for the 2nd generation – 1:2.1, 3rd – 1:1.3 - 1:1.5 and 4th – 1:0.8. It was found that the length of daylight is not the only determining index. |
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Cuvinte-cheie predatory stink bug perillus bioculatus, hibernation, overwintering, sex-ratio, generation, ploşniţa răpitoare Perillus bioculatus, hibernare, iernare, raportul sexelor, generaţie |
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