Učinki izvlečkov iz rastlin Boerhavia diffusa L. nom. cons. in Chromolaena odorata (L.) R.M. King & H. Rob. na nekatere škodljive žuželke na jedilnem oslezu (Aabelmoschus esculentus (L.) Moench)

Emmanuel Tochukwu NNEJI, Robert O. UDDIN II, Abdulrasak K. MUSA

Povzetek


Za ocenitev učinkovitosti izvlečkov izbranih rastlin pri uravnavanju škodljivih žuželk na dveh sortah jedilnega osleza (okre, bamije) je bil izveden poljski poskus. Suhi listni izvlečki vrste Chromolaena odorata (L.) R.M. King & H. Rob. in sveži ter suhi izvlečki korenin vrste Boerhavia diffusa L. nom. cons. so bili uporabljeni za obravnavanja v primerjavi z lamda cihalotrinom in kontrolo. Poskus je bil izveden kot popolni naključni bločni poskus s tremi ponovitvami. Zbrani podatki so bili analizirani s Spearmanovo korelacijo in dvosmerno analizo variance, značilno različna poprečja so bila ločena s Fisherjevim testom najmanjše značilne razlike (LSD) pri 5 % verjetnosti. Rezultati so pokazali, da so tretirane rastline na splošno rastle bolje kot netretirane, bile so višje, imele so več listov in stranskih poganjkov, večji obseg stebla in večji pridelek plodov. Sveži izvlečki korenin vrste B. diffusa so se izkazali kot boljši v vseh merjenih parametrih. Opažena je bila značilno večja pozitivna korelacija med populacijami škodljivih žuželk in med parametri rasti in pridelka medtem, ko je bila korelacija med celokupnim pridelkom in populacijami škodljivih žuželk značilno negativna. Sorta okre NHAe 47-4 je uspevala bolje kot sorta F1-Lucky. Za uravnavanje tobakovega ščitkarja (B. tabaci (Genadius, 1889)) in vrste Amrasca biguttula Ishida, 1912 na jedilnem oslezu priporočamo izvlečke svežih korenin vrste B. diffusa.


Ključne besede


botanična sredstva za zatiranje škodljivcev; Boerhavia diffusa; Chromolaena odorata; Bemisia tabaci; Amrasca biguttula; lepljive pasti sticky traps

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DOI: http://dx.doi.org/10.14720/aas.2020.115.1.1299

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