Template-Type: ReDIF-Article 1.0 Author-Name: Jitka Stará Author-Name: František Kocourek Title: Flight patterns of Hedya dimidioalba, Spilonota ocellana and Pandemis heparana (Lep.: Tortricidae) based on data from pheromone traps Abstract: During 1992-1999 the flight activity of Hedya dimidioalba, Spilonota ocellana and Pandemis heparana was investigated by pheromone traps placed in six apple orchards and a plum orchard in Central and East Bohemia. The cumulative catches of each species were plotted against time of the catch expressed as the sum of degree-days above 10°C (H. dimidioalba and S. ocellana) and 8°C (P. heparana) and approximated by Richards' function. Common parameters of Richards' function could be found for Hedya dimidioalba and Spilonota ocellana from all localities. In Pandemis heparana the flight pattern was different for groups of localities with similar climatic conditions. It was found that the beginning, peak and end of the flight activity of these species in the Czech Republic can be reasonably predicted. Keywords: Spilonota ocellana, Hedya dimidioalba, Pandemis heparana, apple orchards, flight activity, monitoring, pheromone traps, flight pattern, sum of degree-day Journal: Plant Protection Science Pages: 129-137 Volume: 37 Issue: 4 Year: 2001 DOI: 10.17221/8376-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/8376-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:37:y:2001:i:4:id:8376-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Ralph N. Okigbo Title: Occurrence, pathogenicity and survival of Macrophoma mangiferae in leaves, branches and stems of mango (Mangifera indica L.) Abstract: Frequency of occurrence and persistence of Macrophoma mangiferae Higorani & Sharma on 4-year old mango plants (Mangifera indica L.) growing under various conditions were investigated over two periods of 6 months in South-Eastern Nigeria. Among the five locations studied, the frequency of occurrence of the disease was highest at Umuahia, with 65% for leaves and 41% for stems. The chances of the fungus to survive adverse conditions in mango tissues were higher in the stems and branches than in the leaves; more fungal colonies were recovered from the stems and branches than from the leaves. The fungus survived adverse conditions, forming structures such as chlamydospores and thick walled hyphae under continuous light. In the dark, the fungus remained in vegetative form and hence did not produce any sexual reproductive structures. When subjected to continuous light, the fungus produced pycnidia. Leaving dried leaves and fragments of dried stems and branches on the farms is likely to raise the level of primary inoculum for mango diseases. Keywords: Macrophoma mangiferae, survival, mango Journal: Plant Protection Science Pages: 138-144 Volume: 37 Issue: 4 Year: 2001 DOI: 10.17221/8377-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/8377-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:37:y:2001:i:4:id:8377-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Lubomír Věchet Title: Response of susceptible, partially resistant and resistant winter wheat cultivars to Blumeria graminis f.sp. tritici - short communication Abstract: Response of the susceptible cultivar Kanzler, the partially resistant cultivar Mikon and the resistant cultivar Asta (genes of resistance Pm2, Pm6) to powdery, were tested in two years small plot-experiments. Disease severity was influenced by weather conditions. There were highly significant differences in disease severity, infection type and number of diseased plants between the susceptible cultivar and the cultivars with partial resistance and specific resistance. Smaller differences were between the partially resistant cultivar and the resistant cultivar than between the cultivar with partial resistance and the susceptible cultivar. The most affected leaf was the third leaf from the top in all tested cultivars. Among these cultivars were differences in the highest development of disease in single growth stages. Keywords: winter wheat, powdery mildew, disease severity, number of diseased plants, infection type Journal: Plant Protection Science Pages: 145-148 Volume: 37 Issue: 4 Year: 2001 DOI: 10.17221/8378-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/8378-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:37:y:2001:i:4:id:8378-PPS Template-Type: ReDIF-Article 1.0 Author-Name: I. Šafránková Author-Name: L. Marvanová Title: An unusual Penicillium on rockwool in glasshouses Abstract: Species of the genus Penicillium are ubiquitous saprotrophs, spreading easily by conidia through the atmosphere. They appear most frequently in soil and on various organic matter. Penicillium olsonii had been found on seeds of various plants in the Philippines, Thailand and Indonesia. In our case, this fungus was found on the strips of rockwool in the glasshouses of Horticultural Faculty in Lednice (Mendel University of Agriculture and Forestry in Brno) in 2000 and 2001. The strain is preserved in the Czech Collection of Microorganisms, Brno, Czech Republic, as CCM 8259. Keywords: Penicillium olsonii, rockwool, glasshouse Journal: Plant Protection Science Pages: 149-150 Volume: 37 Issue: 4 Year: 2001 DOI: 10.17221/8379-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/8379-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:37:y:2001:i:4:id:8379-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Václav Stejskal Title: A new concept of economic injury level that includes penalization of damage to quality and safety of agricultural products Abstract: The traditional model of Economic Injury Level (EIL) does not allow to directly incorporate aspects of damage to quality and safety of a product (Dq) into the decision-making process to control a pest (pathogen, weed, arthropod, vertebrate). This work now attempts to generalize a concept of EIL by (i) separating damages to quality and safety (i.e. Dq and EILq) from quantitative (i.e. Dw and EILw) types of damage (D) in the traditional EIL-equation, and (ii) by establishing a new way of estimation of EILq based on the penalization of quality and/or safety damage. The importance to distinguish between the terms EIL, EILw and EILq is discussed, and a calculation of the new index (Z), enabling the comparison of the relative economic importance of qualitative and quantitative damage caused by a particular level of pest infestation or disease severity, is proposed. Keywords: integrated pest management, economic injury level, damage, quality, safety, human food Journal: Plant Protection Science Pages: 151-156 Volume: 37 Issue: 4 Year: 2001 DOI: 10.17221/8380-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/8380-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:37:y:2001:i:4:id:8380-PPS