## 3 Discussion  
The procedures presented in our experiment offer a valuable protocol for micropropagation of the genetic copy of selected clones of _S. alata_ to be further applied for many purposes. It is very important in view of the fact that many plant species disappear from \begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Initial Number of** & **After 2 Days of** & **After 4 Days of** \\  & **Insects** & **Incubation** & **Incubation** \\ \hline _Drosophila hydei_ & 30 & 26 & 30 \\ _Acyrthosiphon pisum_ & 50 & 10 & 10 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Number of insects found in the plant funnels after 2 and 4 days of incubation. Figure 3: Response of _Drosophila hydei_ to pyridine in three concentrations (%) as compared with the control. their natural environments as a result of habitat changing and collecting plants for medical or ornamental use. Our investigations showed that the new shoots and leaves proliferation was most effective on the media supplemented with higher doses of BAP (2.0 up to 3.0) in combination with 0.3 IAA or with an addition of 2.0 BAP, and the number of new shoots ranged between 6 and 8 with 25-30 leaves in the first phase of experiment. This procedure could be suitable for effective multiplication of _S. alata_ for different purposes. Similar results were recorded at the second phase of experiment in the case where plants were cultivated earlier on the previously mentioned medium. On average, four new shoots with 22 leaves were obtained. All subcultures characterized root system development after 12 or next 14 weeks of culture. The best process of plant rooting was noted for the \({}^{1}\)/\({}_{3}\)MS medium and the \({}^{1}\)/\({}_{3}\)MS supplemented with 0.3 IAA. The medium containing a higher concentration of BAP (above 1.0 mg/dm\({}^{3}\)) in combination with 0.3 IAA had a significant influence and yielded the greatest fresh and dry mass of plants. [PERSON] et al. [8] demonstrated that in _S. purpurea_ average shoot multiplication per subculture (2 months) over two subcultures was as follows (medium; rate in parentheses): one-third strength MS without hormones (2.0), 4.6 uM kinetin (3.5), 13.3 uM BAP (5.9), and 9.1 uM _trans_-zeatin (4.8). Shoots from hormone-free and kinetin- or BAP-containing media were similar in size but those from the trans-zeatin medium were larger, sometimes double that of other treatments. In the case of three tested species, rooted plants were obtained within 3-7 weeks. In other investigations [PERSON] and [PERSON] [23] showed that \({}^{1}\)/\({}_{3}\) macronutrients and micronutrients at \({}^{1}\)/\({}_{3}\) strength of the Murashige and Skoog (MS) medium and full strength vitamins and an addition of a Plant Growth Regulator (PGR) (0.5 mg NAA, 5.0 mg BA or 0.5 mg NAA + 3.0 mg BA) were favourable for the selected _S. purpurea_ plants. After 12 weeks the largest number of roots grew on the medium supplemented with 0.5 mg/dm\({}^{3}\) NAA but the absence of plant growth regulators increased their length. The best shoots multiplication (3.75 new shoots) was noticed after supplementing the \({}^{1}\)/\({}_{3}\) MS with 5 mg/L BA. Taking into account the threat of extinction of the genus _Sarracenia_, in vitro research may have a positive impact on their future. The multiplication of large amounts of healthy material should meet the demand for carers in different research and private cultivation. In addition, the plants obtained in this way can be used to recover the damaged ecosystems. The volatile compounds, identified through HS-SPME technique, had shown diversified profile, including short-chain alcohols, aldehydes terpen and terpenoids.