magistrsko delo
Nika Lokar (Avtor), Žiga Laznik (Mentor)

Povzetek

Med prehranjevanjem žuželke na rastlini imata tako žuželka, kot tudi rastlina, sposobnost izločanja hlapljivih organskih snovi (HOS). V predhodnji študiji so raziskovalci ugotovili, da listi breskve ob prisotnosti sive breskove uši začnejo izločati HOS. Namen naše raziskave je bil ugotoviti ali te snovi vplivajo tudi na gibanje plenilcev listnih uši. V laboratorijskem poskusu smo preučevali kemotaksijo med sintetičnimi HOS (metil salicilat, (E)-β-farnesen, (E)-β-ocimen in (E)-nerolidol) in ličinkami dvopike polonice (Adalia bipunctata [L.]) ter navadne tenčičarice (Chrysoperla carnea Stephens). Rezultati naše raziskave so pokazali, da vse izbrane snovi vplivajo na gibanje ličink dvopike polonice in navadne tenčičarice. Metil salicilat, (E)-β-farnesen in (E)-nerolidol so se izkazali, kot repelenti za izbrane organizme, medtem ko je (E)-β-ocimen deloval kot atraktant. Raziskava je pokazala, da lahko HOS vplivajo na gibanje ličink navadne tenčičarice le krajši čas po nanosu, medtem, ko te snovi na gibanje ličink dvopike polonice lahko vplivajo dalj časa. Preverili smo tudi vpliv snovi glede na koncentracijo (0,3 in 0,03 ppm). Rezultati so pokazali boljšo odzivnost obeh organizmov pri manjši koncentraciji ampak le v prvih 15 minutah, kasneje opaznejših razlik v naši raziskavi nismo potrdili. V prihodnje bo mogoče uporabiti kapsule z atraktanti, ki privlačijo koristne organizme in s tem bi lahko optimizirali rabo biotičnega varstva rastlin.

Ključne besede

hlapljive organske snovi;Adalia bipunctata;Chrysoperla carnea;biotično varstvo;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UL BF - Biotehniška fakulteta
Založnik: [N. Lokar]
UDK: 632.937:632.7:591.5(043.2)
COBISS: 8963961 Povezava se bo odprla v novem oknu
Št. ogledov: 1011
Št. prenosov: 424
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: ǂThe ǂbehaviour of two-spotted lady beetle larvae (Adalia bipunctata [L.] and green lacewing larvae (Chrysoperla carnea Stephens) on specific volatile organic compounds induced from peach (Prunus persica [L.] Batsch)
Sekundarni povzetek: When the plant is attacked from a herbivor, both of them can produce some volatile organic compounds (VOCs). In a previous study, researchers found that peach leaves in the presence of the green peach aphid began to excrete VOCs. The purpose of our research was to determine whether these substances also affect the movement of aphids. In our study, we explored the chemotactic behavior between synthetic VOCs (methyl salicylate, (E)-β-farnesene, (E)-β-ocimene and (E)-nerolidol) and two-spotted lady beetle larvae (Adalia bipunctata [L.]) and green lacewing larvae (Chrysoperla carnea Stephens). The VOCs that we used in the laboratory study, are typically herbivor-induced compounds from peach cultivars. The first results shows, that all tested compounds have some infuence on both tested organisms. Methyl salicylate, (E)-β-farnesene and (E)-nerolidol showed up as a repellents to two-spotted lady beetle larvae and green lacewing larvae. Otherwise, (E)-β-ocimene were proven as an attractant for both tested organisms. Also the results show us the shortest reactions on VOCs for green lacewing larvae, while two spotted lady beetle larvae was mobile all the time during testing time. In our investigation we used two different concentracions of VOCs. On both tested organisms, the responsiveness were better at lower concentraction but only at first 15 minutes. Later, there were not shown any significant differenties. In the future it will be possible to use capsules with attractants that attract beneficial organisms and thus optimize the use of biological control against insect pests
Sekundarne ključne besede: volatile organic compounds;biological control;
Vrsta dela (COBISS): Magistrsko delo/naloga
Študijski program: 0
Komentar na gradivo: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Strani: IX, 42 f.
ID: 10925540