Primerjava obsega napada kostanjevega listnega zavrtača (Cameraria ohridella Deschka & Dimic) med vrstama divjega kostanja (Aesculus hippocastaneum in Aesculus x carnea) v osrednji Sloveniji.

Špes, Romanca

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Title:	Primerjava obsega napada kostanjevega listnega zavrtača (Cameraria ohridella Deschka & Dimic) med vrstama divjega kostanja (Aesculus hippocastaneum in Aesculus x carnea) v osrednji Sloveniji.
Authors:	ID Špes, Romanca (Author) ID Lešnik, Mario (Mentor) More about this mentor...
Files:	MAG_Spes_Romanca_2010.pdf (731,54 KB) MD5: FDBD765F87163C3E37F67C7EDD7AE493 PID: 20.500.12556/dkum/25e94f4a-4e99-4ee5-b60a-9c21db7cfdbc
Language:	Slovenian
Work type:	Master's thesis
Organization:	FKBV - Faculty of Agriculture and Life Sciences
Abstract:	V poizkusu smo opazovali razvojni krog škodljivca kostanjevega zavrtača (Cameraria ohridella Deschka & Dimic) na navadnem divjem kostanju (Aesculus hippocastaneum) v primerjavi z razvojnim krogom na mesnatem divjem kostanju (Aesculus x carnea). Poskus je bil zasnovan na osnovi prehranske preference škodljivca in nadzorovan v insektariju na prostem, z naključno razmestitvijo vrst, v petih ponovitvah. Poizkus je potekal na Šoli za hortikulturo in vizualne umetnosti Celje od 2. 11. 2008 do 5. 8. 2009. V poizkusu smo merili in beležili premer pege v mm, število izvrtin na list in velikost ličinke v mm. Rezultati meritev kažejo, da so navedene spremenljivke odvisne od vrste divjega kostanja v vseh petih ponovitvah. Z raziskavo smo ugotovili, da traja celotni razvoj kostanjevega listnega zavrtača na navadnem divjem kostanju 8 tednov, v listju mesnatega divjega kostanja pa od 8 do 10 tednov. Izvrtine, ki jih kostanjev listni zavrtač povzroča na listju navadnega divjega kostanja, so v povprečju večje od izvrtin, ki se pojavijo pri napadu zavrtača na listju mesnatega divjega kostanja. Enako velja tudi za ličinke, ki so pri hranjenju z listjem navadnega divjega kostanja večje kot pri hranjenju z listjem mesnatega divjega kostanja. V raziskavi smo potrdili prisotnost dveh generacij škodljivca. Zaradi propada rastlin v začetku avgusta lahko le predvidevamo, da lahko škodljivec razvije tudi tretjo generacijo v klimatskih pogojih osrednje Slovenije. S pomanjkanjem hrane in življenjskega prostora na listih navadnega divjega kostanja se veča intenziteta napada na listih mesnatega divjega kostanja. S poizkusom smo ugotovili, da glavnina ličink na mesnatem divjem kostanju propade, preden se zabubijo, in lahko zaključimo, da je hibrid odporen na kostanjev listni zavrtač in bi bil zato primerna zamenjava za navadni divji kostanj pri urbanističnem in krajinskem načrtovanju.
Keywords:	kostanjev listni zavrtač / navadni divji kostanj / mesnati divji kostanj / razvoj
Place of publishing:	Maribor
Year of publishing:	2010
PID:	20.500.12556/DKUM-13680
NUK URN:	URN:SI:UM:DK:HWRM9UAJ
Publication date in DKUM:	11.05.2010
Views:	3961
Downloads:	315
Metadata:
Categories:	FKBV
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Secondary language

Language:	English
Title:	Comparison of development horse chestnut leafminer (Cameraria ohridella Deschka & Dimic) between two species of horse chestnut (Aesculus hippocastaneum and Aesculus x carnea) in central Slovenia.
Abstract:	The comparison of development of horse chestnut leafminer (Cameraria ohridella Deschka & Dimic) on two species of horse chestnut (Aesculus hippocastaneum, Aesculus x carnea) took place in experimental work at School for horticulture and Visual Art in Celje, from 2nd November, 2008 till 5th of August, 2009. The nutritional preference of the pest for two chestnut species was studied. Chestnut plants ob both species were grown in outside conditions in insect holds and were arranged inside of five separate compartments. The diameter of boreholes (in mm), the number of boreholes on individual leaf and the size of larva (in mm) were determined. The results of measurement are indicating that studied variables depend on species of each horse chestnut. We have found out, that entire development of a horse chestnut leafminer on a common horse chestnut plants lasted 8 weeks, in leaves of red horse chestnut plants the development lasted from 8 to10 weeks. Boreholes on a common horse chestnut leaves, are on average larger from the boreholes that develop when pest feeds on leaves of A. x carnea. The results of measurements of length of larva show the same relationship. Two generations of leafminers were confirmed when observing the pest development on common horse chestnut. Because of the defoliation of the plants at the beginning of August, we can only foresee the possibility for the development of the third generation of the pest in the conditions of central Slovenia. The pest attack rate on the leaves of red horse chestnut increases with the deficit of food and habitat. Experiment has showed that feeding of larva on leaves of the red horse chestnut caused the death of majority of larva before entering the pupae stage. We can conclude that the red horse chestnut hybrid (A. x carnea) is resistant against the studied leafminer and that it would be a suitable replacement for a common horse chestnut (A. hippocastaneum) at establishing new chestnut plantations in urban and other landscape areas.
Keywords:	horse chestnut leafminer / common horse chestnut / red horse chestnut / development

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