Dinamika pojave i intenzitet napada krumpirove zlatice (Leptinotarsa decemlineata Say) na različitim sortama krumpira

master's thesis

• Title (english): Dynamics of appearance and intensity of attacks of the colorado potato beetle (Leptinotarsa decemlineata Say) on different potato varieties
• Author: Roman Radanović
• Mentor: Renata Bažok (mentor)
• Committee member: Renata Bažok (predsjednik povjerenstva)
• Committee member: Maja Čačija (član povjerenstva)
• Committee member: Milan Poljak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Agricultural Zoology); Zagreb
• Defense date and country: 2022-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Krumpir Solanum tuberosum L. je, nakon riže i pšenice, po važnosti treća kultura za prehranu
ljudi u cijelom svijetu. Krumpirova zlatica Leptinotarsa decemlineata Say, najvažniji je štetnik
merkantilnog krumpira u Hrvatskoj. Štetu uzrokuju odrasle zlatice i ličinke ishranom na listu.
Krumpirova zlatica zbog svoje široke rasprostranjenosti, proždrljivosti i brzog razvoja
rezistentnosti na insekticide predstavlja velik problem u proizvodnji krumpira. Posljedica
ishrane može biti potpuna defolijacija, što u konačnici rezultira znatnim gubitkom prinosa. Da
bi se zlatica uspješno suzbila potrebno je primjenjivati što više različitih tehnika suzbijanja ovog
štetnika. Načela integrirane zaštite bilja nalažu primjenu svih raspoloživih tehnika suzbijanja
prije primjene kemijskih insekticida. Jedna od tih tehnika je sadnja sorata tolerantnih na napad
krumpirove zlatice. Pod pretpostavkom da se sorte krumpira dostupne na tržištu razlikuju u
osjetljivosti na krumpirovu zlaticu provedeno je istraživanje na pokušalištu Šašinovec. Cilj
istraživanja bio je u poljskom pokusu u kojem je praćena dinamika pojave i intenziteta napada
zlatice na 18 komercijalnih sorata krumpira utvrditi utječe li neka od njih na brojnost
krumpirove zlatice, odnosno je li intenzitet napada smanjen. Mjerenje visine biljaka
provedeno je da bi se utvrdila dinamika razvoja nadzemnog dijela i eventualna osjetljivost na
napad zlatice. U pregledima je utvrđen broj jajnih legala, ličinki i odraslih krumpirove zlatice,
te izmjerena visina biljaka. Napad zlatice na pokusnom je polju bio iznimno nizak. To se može
povezati s velikim varijacijama u temperaturama tijekom proljeća. U uvjetima tako slabog
napada niti u jednom očitavanju nije utvrđena statistički opravdana razlika između sorata u
broju odraslih, broju jajnih legala i ličinki. Rezultati provedenih pokusa ukazuju da su razlike
između sorata u njihovoj osjetljivosti na napad krumpirove zlatice minimalne, a ako i postoje
nije ih moguće utvrditi u uvjetima slabog napada. S obzirom da na važnost uzgoja otpornih
sorata u održivoj zaštiti bilja bilo bi preporučljivo pokus ponoviti na polju sa jačom zarazom.

Abstract (english)

The potato Solanum tuberosum L. is the third most important crop for human consumption
worldwide after rice and wheat. The Colorado potato beetle (CPB) Leptinotarsa decemlineata
Say is the most important pest of commercial potatoes in Croatia. Damage is caused by adult
beetles and larvae by feeding on potato leaves. Due to its wide distribution, voracity and rapid
development of resistance to insecticides, CPB is a major problem in potato cultivation. The
principles of integrated pest management require the use of all available control methods
before chemical insecticides are applied. One of these techniques is the planting of resistant
varieties that are less susceptible to attack by the CPB. Based on the assumption that potato
varieties available on the market differ in their susceptibility to CPB, a study was conducted at
the Šašinovec experimental field. In this study, a field experiment in which the dynamics of
the occurrence and intensity of the attack by the CPB was observed on 18 commercial potato
varieties, the aim was to determine whether any of them influenced the number of the CPB
or whether they were sensitive to the attack. Plant height was measured to determine the
dynamics of plant development and susceptibility of plants to beetle infestation. During
inspections, the number of egg clutches, larvae, and adult beetles was determined and plant
height was measured. Infestation of the experimental field by the beetle was extremely low.
This could be related to the large temperature fluctuations in the spring. Under conditions of
such low infestation, no significant difference was found between the cultivars in terms of
number of adult beetles, number of egg depositions, and larvae in any of the controls. The
results of the trials suggest that differences among cultivars in their susceptibility to CPB
infestation are minimal, and if they exist, it is not possible to detect them under lowinfestation
conditions. Sustainable crop protection emphasises the importance of resistant
cultivars, so it would be advisable to repeat the experiment in a field with a higher CPB
population density.

• Keywords: dinamika i intenzitet pojave; krumpir; krumpirova zlatica; osjetljivost na napad; sorte krumpira
• Keywords (english): Colorado potato beetle; dynamics of appearance; intensity of attacks; potato; potato varieties
• Language: croatian
• URN:NBN: urn:nbn:hr:204:540941
• Study programme: Title: Phytomedicine; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka fitomedicine (magistar/ magistra inženjer/inženjerka fitomedicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2022-09-30 12:53:51