Plant Protection Science, 2006 (vol. 42), issue 4
Index of Volume 42Index
editors
Plant Protect. Sci., 2006, 42(4):I-VI | DOI: 10.17221/2766-PPS 
Genetic diversity of Cryphonectria parasitica population in the Štiavnicko-krupinská subpopulation in Slovakia
Katarína Adamčíková, Gabriela Juhásová, Marek Kobza
Plant Protect. Sci., 2006, 42(4):119-124 | DOI: 10.17221/2767-PPS
The structure of C. parasitica populations was evaluated in Štiavnicko-krupinská subpopulation in Slovakia. A total of four vegetative-compatibility (vc) types were detected among the sample of 215 isolates, which respond to following European vc types: EU-12, EU-2, EU-13, and EU-8. Number of vc types on single sites varied between one and four. One vc type (EU-12) was the dominant in Štiavnicko-krupinská subpopulation. This vc type (EU-12) comprised 93% of all isolates and was found on each site. Two vc types were represented by only one or two isolates. The observed vc type frequencies were compared with expected vc type frequencies. The...
The toxicity of bean flour (Phaseolus vulgaris) to stored-product mites (Acari: Acaridida)
Jan Hubert, Marie Němcová, Gamila Aspaly, Václav Stejskal
Plant Protect. Sci., 2006, 42(4):125-129 | DOI: 10.17221/2770-PPS
Legume proteins were shown to have insecticidal activity against stored-product pests. Grain enriched by bean (Phaseolus vulgaris) flour inhibits the growth of stored-product mites. In this study, we tested the toxicity of bean flour to storage mites under optimal conditions for their population growth (i.e. rearing diet, temperature: 25C and humidity optimum: 85% RH). Bean flour was added to the diet in one of eight concentrations: 0, 0.01, 0.1, 0.5, 1, 2.5, 5, 10%). The population growth of Tyrophagus putrescentiae, Acarus siro and Aleuroglyphus ovatus initiating from a density of 50 mites per 0.2 g of diet was recorded...
Effect of mahogany Khaya senegalensis seed oil in the control of Callosobruchus maculatus (Fab.) (Coleoptera: Bruchidae) on stored cowpea.
Lucius J. Bamaiyi, Iliya S. Ndams, Williams A. Toro, Sarah Odekina
Plant Protect. Sci., 2006, 42(4):130-134 | DOI: 10.17221/2765-PPS
Khaya senegalensis seed oil was evaluated for its efficacy in the control of Callosobruchus maculatus on stored cowpea. The oil was extracted locally from the dry K. senegalensis seeds. This was compared with Pirimiphos methyl E.C. as a standard. There was almost complete adult mortality of C. maculatus at 24 h after treatment with seed oil at 1, 2 and 3 ml/100 g of cowpea. The seed oil significantly reduced the F1 and F2 progeny emergence. The reduction in oviposition was not significant when compared with the control. The damage caused by C. maculatus was significantly reduced by...
The effect of ambient temperature on the development of cotton bollworm (Helicoverpa armigera Hübner, 1808)
Andrea Barteková, Ján Praslička
Plant Protect. Sci., 2006, 42(4):135-138 | DOI: 10.17221/2768-PPS
The development of individual cotton bollworm stages depending on the ambient temperature was studied in laboratory conditions. The effect of temperature on the development of all stages of Helicoverpa armigera was studied at three constant temperatures of 20, 25, and 30°C in temperature-controlled chambers. The temperature dependence of the developmental rates and the thermal thresholds were established by means of linear regression. Our data has established following optimal temperatures: the lower thermal threshold for the development of the Helicoverpa armigera eggs is 14.83°C, for the development of the larvae is 11.34°C and...
First report of anthracnose of common snowberry caused by Sphaceloma symphoricarpi in the Czech Republic
Václav Kůdela, Václav Krejzar
Plant Protect. Sci., 2006, 42(4):139-146 | DOI: 10.17221/2769-PPS
During the first part of July, 2006, a severe outbreak of disease on common snowberry shrubs, Symhoricarpos albus var. laevigata, was observed in some city ornamental parks and small gardens in Prague and its environs. Based on disease symptoms and pathogen characteristics both on leaves, shoots, fruits and in culture, it can be concluded that the outbreak of anthracnose on common snowberry was caused by Sphaceloma symphoricarpi Barus & Horsfall 1928. This is probably the first record of S. symphoricarpi in the Czech Republic. Of the surveyed Symphoricarpos species and varieties, i.e. S. albus var....