Plant Protection Science, 2002 (vol. 38), issue 4

Sensitivity and specificity of monoclonal antibody Mn-Cs1 for detection and determination of Clavibacter michiganensis subsp. sepedonicus, the causal agent of bacterial ring rot of potato

Iveta Pánková, Blanka Kokošková

Plant Protect. Sci., 2002, 38(4):117-124 | DOI: 10.17221/4866-PPS  

Distribution, variabiality and overwintering of Zucchini yellow mosaic virus in the Czech Republic

Jiří Svoboda, Jaroslav Polák

Plant Protect. Sci., 2002, 38(4):125-130 | DOI: 10.17221/4867-PPS  

The incidence of Zucchini yellow mosaic virus (ZYMV) was monitored in the south Moravian region of the Czech Republic during 1997-2001. Crops of gherkin, squash, zucchini and cucumbers were found infected with ZYMV, manifested by symptoms of severe stunting and yellowing with deformed leaves and fruits. Twenty to eighty percent of infected plants were recorded. Six isolates of ZYMV from four localities were differentiated on indicator plants; three of them were maintained as being typical for differences in pathogenicity. Overwintered weed species were tested for the presence of the virus. ZYMV was detected by ELISA in one plant of Tripleurospermum...

Monitoring the population dynamics of the horse chestnut leafminer Cameraria ohridella with a synthetic pheromone in Europe

Jiří Kindl, Blanka Kalinová, Jona Freise, Werner Heitland, Sylvie Augustin, Sylvan Guichard, Nikos Avtzis, Aleš Svatoš

Plant Protect. Sci., 2002, 38(4):131-138 | DOI: 10.17221/4868-PPS  

A monitoring system for Cameraria ohridella males based on a synthetic sex pheromone was tested in the Czech Republic, Germany, France and Greece. From the obtained data on the insect phenology we concluded that in Central Europe C. ohridella typically has three generations per year. The pheromone monitoring can be used to detect the pest when it appears in uninfested areas and is also suitable to determine population densities.

Differences in flight activity of pests on winter and spring oilseed rape

Josef Šedivý, Jan Vašák

Plant Protect. Sci., 2002, 38(4):139-144 | DOI: 10.17221/4869-PPS  

For 6 years the flight activity of pests on winter and spring oilseed rape was studied from spring till harvest, using yellow traps. In all years the flight intensity was higher in winter rape than in spring rape. The dominant insect pests of winter oilseed rape were Ceutorhynchus obstrictus, C. napi, C. pallidactylus, Dasineura brassicae, Meligethes aeneus, Phyllotreta atra and Ph. nigripes; subdominant were Athalia rosae, Brevicoryne brassicae and Psylliodes chrysocephala. In spring rape the dominant species were Brevicoryne brassicae, Ceutorhynchus obstrictus,...

Citrus flatid planthopper - Metcalfa pruinosa (Hemiptera: Flatidae), a new pest of ornamental horticulture in the Czech Republic

Pavel Lauterer

Plant Protect. Sci., 2002, 38(4):145-148 | DOI: 10.17221/4870-PPS  

In late August of 2001 a population of Metcalfa pruinosa (Say, 1830) consisting of several dozens of adults and larvae was observed in a nursery of ornamentals at Brno-Bystrc. The species occurred mostly on young twigs of cultivars of Thuja occidentalis L., Juniperus communis L. and Sorbus aucuparia L. but also Lilium spp. and singly on other various wood and herbal ornamental plants. The damage was rather of an aesthetic kind: young twigs were covered by 5-10 cm long spots of waxy fluff produced by the larvae. The pest is native to North America and was introduced in the late 1970's to Italy, from where...

Secondary succession on an early abandoned field: vegetation composition and production of biomass

Jindra Štolcová

Plant Protect. Sci., 2002, 38(4):149-154 | DOI: 10.17221/4871-PPS  

During 1996-2000 the secondary succession on a field left fallow was investigated. The experimental area was divided into a ploughed and an unploughed part. Both parts were divided into 5 × 5 m plots that were either left intact (control), mowed in June or July, or superficially cultivated in June. The position of the plots was identical each year. In successive years total dry matter production decreased in all experimental plots; in unploughed plots more than in ploughed ones. The spread of Cirsium arvense (L.) Scop. was increased by ploughing and superficial cultivation. Ploughing stimulated the spread of perennial dicotyledonous plants...

RNDr. Zdenko Polák, CSc. - 70 years - Biographical Notice

J. Polák

Plant Protect. Sci., 2002, 38(4):155-156 | DOI: 10.17221/4872-PPS