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Protection Limits PDF Print E-mail

The temperatures in the table below are the minimum temperatures where our machines still had good results. The data in the table below are not "absolute" values. We regularly adapt these values, based upon new experiences from our customers and from some Research Centres.

The critical temperatures also depend on the stage of flowering and the size of the fruits. For example: we had good results at -8 to -9 °C in pears in the stage "white bud", while the table here shows -5,5 °C for "full flowering". So in certain flowering stages, the minimum temperatures where we can provide protection are lower.

Frostbuster FrostGuard Windmachine*
Radiation Frost Relative Humidity
Full Flowering > 85 % - 5,5 °C - 5,5 °C - 5 °C
Full Flowering < 85 % - 3,5 °C - 3,5 °C - 3 °C
Fruits > 85 % - 3,5 °C - 3,5 °C - 3,5 °C
Fruits < 85 % no result no result no result
Wind Frost Relative Humidity
Full Flowering > 85 % - 4,5 °C - 4,5 °C no result
Full Flowering < 85 % no result no result no result
Fruits > 85 % - 3,5 °C - 3,5 °C no result
Fruits < 85 % no result no result no result

* = the capacity of a windmachine depends a lot on the temperature and the eventual use of an extra heating system (although a heating systems is very expensive and not very efficient) and of course of the quality of the inversion layer. The protected area varies from 1 ha. (at -5 °C) to 5 ha. (-3 °C).