Stanislaw Ignatowicz

• Professor at Warsaw University of Life Sciences

Many customer complaints are on food products contaminated by insect pests. The problem arise from holes in the package, seals that did not seal properly, sealing of the packaging material with product parts, boxes that do not have an inner liner, and even packaging material that can be chewed into by insect pests. Also, from openings produced by m...

The manufacturers of food products try to interpret some customer complaints on final products that are contaminated by insect pests. Question thus arises-if this insect larva found in food has passed the processing, and was it treated by heat? To answer this question one should observe the post mortal processes that occur in insect body. Melanisat...

Recently (January 2010), we have found that drugstore beetle, Stegobium paniceum (L.), is a serious pest of old books in a religious library in Cracow, Poland. About 80% old books were found more or less damaged by this pest. As the result of larval activity, many holes and tunnels were formed in damaged books. Some of them were old, some of them w...

Results of the study on the following tests for separation of irradiated pests from untreated ones are reported: (a) test for identification of irradiated mites (Acaridae) based on lack of fecundity of treated females; (b) test for identification of irradiated beetles based on their locomotor activity; (c) test for identification of irradiated pest...

Viable eggs of the European red mite, Panonychus ulmi (Koch), on apples have been the concern of several importing countries and exports require preshipment, phytosanitary treatment to reduce or eliminate live eggs. Because fumigation is often detrimental to the commodity appearance and shelf-life, resulting in a loss of commercial value, there is...

After the irradiation treatment with doses ranging from 0.1 to 0.5 kGy, the melanization process was significantly inhibited in the 1st and 2nd instar larvae of the khapra beetle, Trogoderma granarium Ev., killed by freezing on the 1st and 2nd week after irradiation. Also, irradiation inhibited significantly the melanization of the 4th instar larva...

Juvenile and adult nematodes emerged from onion and garlic samples on the 3rd week after irradiation with doses up to 0.5 KGy, and from potato treated with doses up to 2.0 kGy. However, irradiation of onion infected with Ditylenchus dipsaci caused the inhibition of the development and growth of juvenile nematodes to mature forms. Doses of gamma rad...

The bioinsecticide DIPEL 2X irradiated with doses of gamma radiation up to 2.0 kGy preserves its insecticidal efficiency against larvae of the Indian meal moth, Plodia interpunctella (Hübner). The amount of DIPEL 2X-treated food taken in by larvae irradiated with 0.1-0.7 kGy is sufficient for bringing about the death of these larvae.

The results of electrophoretic separation of proteins (SDS-PAGE) revealed several protein bands from homogenate samples of irradiated and control adults of the confused flour beetle, Tribolium confusum DuVal. However, it was not possible to detect protein bands that show any shifts or separations between the irradiated and control beetles of the co...

Substerile bulb mite, Rhizoglyphus echinopus (F. et R.), survivors of gamma radiation treatment with low doses provide partial protection against future infestation of stored product. The invading mites mate with their substerile partners, and their productivity is lowered for a few successive generations.

The two-spotted spider mites (Tetranychus urticae Koch) were collected in 1961 from a number of bushes of the common elder (Sambucus nigra L.) in the dunes of Voorne in The Netherlands, and a ’Sambucus’ strain was established in the laboratory. Since then, this strain has been cultivated on beans (Phaseolus vulgaris L.) in strict isolation under co...

The criterion for efficacy of irradiation of agricultural products as a quarantine treatment should be based on the inability to perpetuate the pest at a new location rather than in causing immediate mortality. Sterility in insects and mites is achieved following irradiation of adults and immatures at much lower doses than needed to kill these pest...

Starting from the Sambucus strain of the two-spotted spider miteTetranychus urticae Koch, the strains ND1 and ND2 were selected for lack of diapause under a short-day regimen (LD 1014, 18C). The genetic basis of the suppression of diapause in ND1 and ND2 was analysed by means of mendelian crosses and backcrosses, using the photoperiodic cycle LD 10...

Wyd. 1

Untreated females of the mold mite, Tyrophagus putrescentiae (Schrank), were crossed with both irradiated and untreated males, and effects of the order of pairings on the fecundity, egg viability, productivity of females, and sex ratio of progeny were studied. Untreated females crossed with males irradiated with a 60-, 80-, or 100-krad dose laid on...