Q15. More about fungus in our soils. It is giving problems after the recent high rainfall.

Answer: I do not understand this question. Fungi in the soil have many roles in breaking down organic matter and releasing elements in plant-available forms. Some fungal species are saprophytes which mean they live on dying and dead plant material; some will infect living plant material such as root pathogens causing the plant to become less thrifty and, maybe, die. Some may be mycorrhizal meaning that they have a special relationship with certain plant roots providing the roots with elements such as phosphorus, in exchange for carbohydrates.
The problems after wet weather suggests you are referring to leaf pathogens such as downy mildew or powdery mildew, for example. Mildews can be a problem in damp weather but are generally a sign of poor management and excess use of chemicals. Our system of monoculture increases the outbreaks of mildews in vineyards, for example. Improving soil health is a good start to minimising leaf pathogens. Managing the canopy of vines or fruit trees so that good ventilation occurs is a good strategy. Dry leaves minimise fungal spore germination so disease organisms cannot get established. Considering biological alternatives would be my suggestion. There is a biological to replace most chemicals. Concoct Agpath P/L for advice if you wish.

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