Krispijn Scholte

Learn More
The goal of our research is the design and implementation of a surveillance system based on an Automatic Identification System (AIS). The AIS system enables operators in a control room to monitor ship movements in and along the harbour. There is a need to support human operators. The automated system is modelled after human operator. The transitions between(More)
The incidence ofRhizoctonia solani in potato was studied in two crop rotation experiments from 1981 to 1985 inclusive. The greater the frequency of potato cropping, the more severe the attack on stems and stolons byR. solani. Severity of black scurf on progeny tubers and cropping frequency were also correlated, but less significantly. In fields with(More)
The effects of soil-borneRhizoctonia solani on yield and quality of potato were studied by an extensive individual plant sampling procedure. From 1983 to 1986, stem canker and stolon pruning were examined in 10 768 plants growing on a sandy soil. Tuber yield and quality and haulm yield per plant were also recorded. The degree of attack byR. solani depended(More)
Effects of crop rotation on the incidence of soil-borne pathogens and on the performance of potato were investigated in five field experiments. Rotations differed in cropping frequency of potato and in crop sequence. Incidence of stem canker caused byRhizoctonia solani was strongly influenced by the cropping frequency of potato and not by crops with which(More)
The yield of potatoes decreased as the frequency of growing this crop in a rotation increased, even in the absence of well-known soil pathogens e.g.Globodera spp. Soil disinfection with methylbromide or pasteurization at 60°C with steam for 30 min eliminated the rotation effect on yield, suggesting that it was caused by a complex of microbial pathogens.(More)
Samples of a sandy soil and a marine clay soil sterilized by steam were put in 55-1 containers insulated with polystyrene and placed outdoors on a brick pavement. Sandy soil was infested singly or in all possible combinations with root-knot nematodes (Meloidogyne spp.) and the fungiRhizoctonia solani andVerticillium dahliae, and the marine clay soil was(More)
The effect ofStreptomyces spp. (netted scab) on the growth of potato was investigated in three pot experiments, in two of which the effect ofVerticillium dahliae was also assessed. The netted scab organisms attacked all underground plant parts of susceptible potato cultivars early in the growing season; the roots were especially seriously attacked, markedly(More)
Four experiments (three with four cultivars, one with twenty cultivars) investigated the effect of different storage temperature regimes on the duration of dormancy of seed potatoes harvested immature. Regimes included constant temperatures (18 and 28°C), hot pre-treatments (20 days at 28°C and subsequently 18°C) and cold pre-treatments (20 days at 2°C and(More)
In this paper it is argued from published descriptions and experimental results, that russet scab in the USA and russet scab in Europe are two different diseases. To resolve this nomenclatural problem in the English language we propose that the name ‘netted scab’ should henceforth be used for the russet scab in Europe in agreement with the other European(More)
The effects of cropping frequency on the yield of potato and on the development of soil-borne diseases was studied from 1979 to 1985 in a crop rotation experiment on a marine clay soil. Tuber yield decreased markedly with increasing cropping frequency. The yield of cv. Hertha was reduced by 27% in continuous cropping and by 15% in a wheat/potato or sugar(More)