Biochemiluminescence of certain fungi

Twelve species of fungi growing on the Sabouraud medium in darkness and illumination in an incubator, were tested to find out their ability to emit the ultra-weak biochemiluminescence. Using a sensitive photon-counling device, it was possible to measure biochemiluminescence intensity during ten days of cultures growth. <i>Boletus edulis, Pestalotia funerea</i> and <i>Microsporum gypseum</i> displayed biochemiluminescence, while <i>Aspergillus nidulans, A. quadrilineatus, Beauveria bassiana, Macrophoma candollei, Mucor lausanensis, Paecilomyces farinosus, Penicillium</i> sp., <i>Trichoderma lignorum</i> and <i>Tricholoma equestre</i> failed to do it. Illumination put down biochemiluminescence and stimulated colour formation in both mycelia and in the medium.

Disease symptoms occurring in caterpillars of Malacosoma neustria L. (Lepidoptera) infected by some fungi

The infection of <i>M. neustria<-i> caterpillars by <i>Beauveria bassiana<-i> (Bals.) Vuill., <i>Metarrhizium anisopliae<-i> (Metsch.) Sorok., <i>Paecilomyces farinosus<-i> (Dicks. ex Fr.) Brown et Smith, <i>Verticillium lecanii<-i> (Zimm.) Viegas causes the decrease of their viability, paralysis and mummification of the body. Only in the case of B. bassiana the character distinguishing infection by this fungus are black spots on the surface of the cuticle. The easy development and aboundant spore formation of the above-mentioned hyphomycetous fungi on <i>M. neustria<-i> facilitate the determination of the causes of the disease.

Growth of the entomopathogenic fungi on the medium containing herbicides used in orcharding

<i>Beauceria bassiana</i> (Bals.) Vuill., <i>Paecilomyces farinosus</i> (Dicks: Fr.) brown et Smith, <i>Verticillium lecanii</i> (Zimm.) Viegas, <i>Conidiobolus thromboides</i> Drechsler, <i>Erynia pieris</i> Li et Humber, <i>E. radicans</i> (Brcf.) Humber were examined on medium to which were added ten herbicides, one fungicide and one insecticide.

Entomopathogenic fungi isolated in the vicinity of Szczecin

The spectrum and occurrence of entomopathogenic fungi in litter beech forest. meadow soil and arable soil were evaluated using an "insect bait method". Soil and litter samples taken in autumn and spring from each stand were baited with <i>G. mellonella</i> larvae at 22°C. Six species of entomopathogenic fungi infected these larvae. In the litter <i>Beauveria bassiana</i> was the dominant species. Besides <i>B. bassiana</i>, 23% of <i>G. mellonella</i> larvae were infected by <i>Paecilomyces farinosus</i> in autumn. In the forest soil the dominant entomopathogenic fungus was not found. In this stand the number of infected larvae was the lowest. <i>Metarhizium anisopliae</i> was the dominant species in the meadow soil in both sampling periods. In the soil taken from a rye field<i> P. fumosoroseus</i> and <i>B. bassiana</i> infected <i>G. mellonella</i> larvae almost to the same degree. It was established that <i>B. bassiana</i> and <i>M. anisopliae</i> infected more <i>G. mellonella</i> larvae in spring than in autumn. In the case of <i>P. farinosus</i> and <i>P. fumosoroseus</i> an opposite tendency was observed.

Ineraction between some saprophytic and entomopathogenis fungi

The studies on interactions between selected entomopathogenic fungi: <i>Beaweria bassiana, Conidiobolus thromboides (= Entomophthora virulenta), Paecilomyces farinosus, Verticillium lecanii</i> and four species of saprophytic fungi were carried out.

The influence of chitin synthesis inhibitors on growth of entomopathogenic fungi in vitro

<i>Beauveria bassiana, Paecilomyces farinosus, Verticillium lecanii, Conidiobolus thnmboides, Erynia pieris, E. radicans</i> were examined on medium to which were added three chitin synthesis inhibitors.

Temperature requirements of four entomopathogenic fungi

Infection potential of <i>Beauvaria bassiana, Metarhizium anisopliae, Paecilomyces farinosus</i> and <i>P. fumosoroseus</i> to <i>G. mellonella</i> larvae in pine litter was established. The growth of these fungi on the Czapek's Dox medium exposed to different temperature was determined.

Occurrence of entomopathogenic fungi in arable soil and meadow soil

The samples of soil for experiment were taken from arable field and meadow. Larvae of <i>Laspeyresia pomonella</i> and <i>Plodia interpuactella</i> were used as an "insect bait" for isolation of entomopathogenic fungi from the soil. <i>Beauveria bassiana, Metarhizium anisopliae, Paecilomyces farinosus</i> and <i>P. fumosoroseus</i> were isolated from both kinds of soil.

The efficiency of Paecilomyce farinosus as biocontrol to larve stage on second ad sixith instar larve of Trogoderma granarium (Everts)

The present study was conducted to determine the pathogenicity of Paecilomyces farinosus as biocontrol agents against Tragoderma granarium (khapra) under laboratory conditions with three concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml). The laboratory results revealed that fungi showed it's higher pathogencity to larve stage on 2nd instar and 6th instar , although their capability differs according to the fungi concentrations this fungi caused higher mortality of 2nd larval instar 70% and 60% ,55% when it was used at concentrations 2 .8 x 106 ,2.8 x104 spores/ ml respectively. On the other hand on 6th larval instars 55% , 35% , 30% at concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml) respectively, and the highest rate of distortions in the adult insects from the 2nd instar treatment than the adult insects from the 6th instar treatment concentration of this fungi.