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Z badań nad zwalczaniem promieniami gamma owadów niszczących zabytki i muzealia. Część 2 - Odporność różnych gatunków

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Krajewski A.

Ochrona Zabytków

1997

issue 1

47-55

The first part of the research conducted upon various development stages found that gamma ray control of insects causing damage to historical monuments and museum exhibits requires doses which at least partially eliminate the possibility of a further feeding by the larvae (cf. „Ochrona Zabytkow” 1996, no. 4, p. 395-408). The following stage of research entailed experiments on the selection of suitable dosage for combating the larvae of several species. The system affiliation of those species, the number of larvae in the experiments, the applied doses, as well as the thermal conditions of the culture are presented in table 1. Test material was radiated in glass test tubes, without the culture medium, in the „Issliedovatiel” ionisation chamber of the VII Department of the Institute of Nuclear Chemistry and Technology in Warsaw. The radiation source was cobalt 60 Co. The experiments determined the various resistance to gamma rays on the part of particular species. The obtained results are contained in fig. 1, 2, 3, 5 and 6. The author resigned from a graphic presentation of the outcome in the case of Lepisma saccharina L. owing to the small number of the radiated groups of insects. Table data published by J. D. Bletchley in 1961 were used for comparative purposes (fig. 4). It was found that the dosage appropriate for combating pests causing damage to cultural property was equal to doses which produced effects within the following limits: discontinuation of further feeding — immediate death of larvae. The doses for particular species are: 1) Tinea pellionella L. — 2-3 kGy, 2) Anobium punctatum Deg. and Ptilinus pectinicornis L. — 2-3 kGy, 3) Stegobium paniceum L. and Lyctus brunneus Steph. — 1,5-3 kGy, 4) Antbrenus museorum L. — 1-3 kGy, 5) Hylotrupes bajulus L. — 0,5-2 kGy. These results demonstrate that also Lepisma saccharina L. does not belong to insects extremely resistant to gamma rays. The author discusses the outcome of experiments, which he confronts with earlier publications, and proposes hypotheses which could explain the differentiated resistance of the species under examination.

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1 Ochrona Zabytków

1 Krajewski A.

1 1997

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Z badań nad zwalczaniem promieniami gamma owadów niszczących zabytki i muzealia. Część 2 - Odporność różnych gatunków