Create a Smoke Screen or Fog Against Frost
This involves creating an opaque veil of smoke or fog (nebulization) during the night when frost appears to limit soil radiation and thus the temperature drop, and during sunrise to limit the rapid warming of vegetative parts which can cause burning (magnifying glass effect). The veil can be obtained by combustion within or at the edge of the plot of materials such as straw, old vine stocks, wood scraps, straw bales, or by implementing more recent devices designed to create artificial fog.[1]
These latter devices, hitched to a tractor to be mobile within plots, consist of producing ultra-fine droplets at 40 °C from trace elements and glycerin to create an opaque fog over the entire area to be protected.
The advantage of this method is its lower cost. However, burning also has many drawbacks: visual and olfactory pollution, handling and night monitoring required, making it unsuitable for long-term use.
Sources
- ↑ Hail and spring frost: how to protect yourself?, published by the IFV
