Bernhard Hau

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To the Editor: The highly domestic mosquito species Aedes aegypti, a tropical, nonnative vector of dengue and yellow fever, has been identified in several desert communities, including the city of Tucson and the border towns of Douglas, Naco, and Nogales (1). Ae. aegypti has now been found in the southern Arizona communities of Benson and Sahuarita Heights,(More)
The effect of the primary infection site by Fusarium graminearum and F. culmorum within wheat ears on Fusarium head blight (FHB) was investigated under controlled conditions. FHB development was assessed visually and thermographically following inoculation by: (i) spraying ears, or injecting inoculum into spikelets on (ii) tip, (iii) centre and (iv) base of(More)
A model describing an early blight epidemic and the growth dynamics of tomato interacting together is developed. The model is formulated as a set of differential equations for the rate of change in the amount of healthy H, diseased Y and defoliated D area in the disease situation, and healthy H DF and defoliated D DF in the disease-free situation. Model(More)
Six field experiments were carried out during the summers of 1997 to 2003 to evaluate disease progress of soybean brown spot caused by Septoria glycines considering two tillage systems, conventional and no-tillage (wheat was cultivated during winter in all plots). Two logistic models were fitted to the disease progress data: (i) a logistic model with(More)
A model simulating the progress of powdery mildew coupled to the growth dynamics of tomato, with a time step of 1 day, is developed. The model is formulated as a set of differential equations for the rate of change in the amount of healthy, diseased and defoliated leaf area of a diseased plant relative to that of a healthy crop. The main assumption of the(More)
Black leaf mold (BLM), caused by Pseudocercospora fuligena is a serious threat to tomato production in the humid tropics. Accurate information about the incubation (IP) and latent period (LP) under various host susceptibility and weather favourability circumstances will help to formulate holistic approaches to manage this disease. In this study, effects of(More)
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