Published in Atmospheric Environment (1967)
The extreme particle size range and enormous heterogeneity of airborne biological particles make sampling a significant challenge. Three major sampler types available include gravity devices, impactors and suction samplers. Gravity methods, while most commonly used, are neither qualitatively or quantitatively accurate and of very limited use. Impac...
Various aspects of the development of the entomopathogenic fungus Aschersoniaaleyrodis as a control agent of greenhouse whitefly, Trialeurodesvaporariorum , were investigated. For control of greenhouse whitefly in tomato crops the parasitoid Encarsiaformosa has been successful, but in cucumber crops a successful suppression of the whitefly populati...
Naar aanleiding van persberichten in september 1986 over verhoogde gehaltes aan radioactief cesium (137 Cs) in paddestoelen en de raadgeving om alle vruchtlichamen te plukken en ter vernietiging als radioactief afval aan te bieden, wordt achtergrondinformatie uit de literatuur verschaft. Geconcludeerd wordt dat genoemde maatregel als verwerpelijk b...
The granular nematicides aldicarb, oxamyl and ethoprophos often are applied to control plant parasitic nematodes. However, the use of these pesticides may have some disadvantages. In field trials, they increased stem infection of potatoes caused by Rhizoctonia solani Kühn and incidence of black scurf (sclerotia of R. solani ) on tubers. This thesis...
Experiments in the laboratory and on farms with potato tubers in storages are described in which sclerotia of Rhizoctonia solani were inactivated after inoculation of infected tubers with a suspension of conidia and hyphal fragments of Verticillium biguttatum
Resumo 156.
Cultuurfiltraten van 17 mycoparasitaire schimmelsoorten, die waren geisoleerd van andere schimmels, werden getoetst op hun werkzaamheid tegen komkommermeeldauw, Spaerotheca fuliginea. De beste biologische bestrijding werd verkregen met Calcarisporium arbuscula
