Szkodniki owocow i nasion jarzebiny Sorbus aucuparia L. na wybranych stanowiskach Ojcowskiego Parku Narodowego w latach 1994-1995

• Autorzy: Skrzypczynska M
• Języki publikacji: PL

Abstrakty

PL

W pracy podano wyniki badań dotyczących szkodników owoców i nasion jarzębiny Sorbus aucuparia L.: Argyresthia conjugella Zell., Megastigmus brevicaudis Ratz, i Syntomaspis aucuparíae Rodz. Badane owoce (łącznie 30 785) pobrano w Ojcowskim Parku Narodowym w latach 1994-1995 z 99 drzew rosnących na 12 stanowiskach.

EN

The study concerning the species composition of the insect pests feeding fruits and seeds of rowan-tree Sorbus aucuparia L. was carried out in the Ojców National Park, sections 2, 5, 7, 9, 10, 14, 24, 25, 27, 30, ,31, 33 in 1994 and 7, 10, 14 and 31 in 1995 (Fig 1). A total of 30785 fruits were collected from 99 growing trees including 20800 in 1994 gathered from 65 trees. All fruit samples were analyzed in laboratory to estimate those infested by insect larvae. Then, fruits and the larvae found during analyses were designed for mass rearing. In order to compare fruits infestation by Argyresthia conjugella Zell. (Lepidoptera, Yponomeutidae) in samples of various number of fruits the indices of fruit infestation were calculated. One of them — the absolute index was calculated by dividing the number оf A. conjugella individuals by the number оf all fruits in a sample; the other, relative index was calculated by dividing the number of A. conjugella individuals by the number of damaged fruits in a sample. Based on the results obtained following damaging insects were found: Argyresthia conjugella Zell. (Fig. 2), Megastigmus brevicaudis Ratz. (Fig. 3), Syntomaspis aucupariae Rodz. (Hymenoptera, Torymidae) (a total of 1302 indiv.). Besides, a saprophagous insect Clinodiplosis cilicrus (Kieff.) (Diptera, Cecidomyiidea) was found (14 indiv.). The most numerous proved to be A. conjugella — 1209 indiv. (Tables 1, 2), which constitutes 92.86% of all damage insects obtained. The remaining species mentioned in tables 3 and 4 were rare. A. conjugella caused heavy losses in the fruits, being in the range from 20.91% (in 1994) to 31.12% (in 1995). The indices of infestation of fruits by A. conjugella showed distinct differences in values for both years (Tables 1, 2). Mentioned indices obtained from the same locality in two replications indicative of the dynamics of populations A. conjugella throughout years. During the study period only parasitoid of A. cunjugella, namely Lissonota polita (Marsch.) (Hyme- noptera, Braconidae) - 10 indiv. was reared from fruits. Its percentage in relation to the number of its host amounted to 0.83%. Colletlion of only one parasitoid species would indicate a weak resistance of die environment to fruit - and seminiphagous species studied. The studies of the dynamics of populations of these insects should be continued.

Słowa kluczowe

PL

Ojcowski Park Narodowy; lesnictwo; drzewa lesne; jarzab pospolity; Sorbus aucuparia; entomologia lesna; owady; szkodniki roslin; szkodniki nasion; szkodniki owocow; znamionek jarzebinowiec; Megastigmus brevicaudis; licinek malzonaczek; Lissonata polita; Argyresthia conjugella; Syntomaspis aucupariae; Clinodiplosis cilicrus; wystepowanie

EN

Ojcow National Park; forestry; forest tree; rowan; Sorbus aucuparia; forest entomology; insect; plant pest; Megastigmus brevicaudis; Lissonata polita; Argyresthia conjugella; Syntomaspis aucupariae; Clinodiplosis cilicrus; pest occurrence

• Wydawca: -
• Czasopismo: Acta Agraria et Silvestria. Series Silvestris
• Rocznik: 1996
• Tom: 34
• Opis fizyczny: s.93-104,rys.,tab.,bibliogr.

Twórcy

autor

Skrzypczynska M

• Akademia Rolnicza, Krakow

Bibliografia

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• Skrzypczyrńska M.: Owady — szkodniki nasion, szyszek i owoców drzew oraz krzewów w Ojcowskim Parku Narodowym. Prądnik 9, 217, 1994/95.
• Skrzypczyńska M.: Znamionek jarzębinowiec —szkodnik nasion jarzębiny zwyczajnej. Wszechświat 96, 264, 1995.
• Skuhravá M.: Monographie der Gallmückengattung Clinodiplosis Kieffer, 1894. Studie CSAV. Akademia, Praha 1973.
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