Spring frost damage to vines

Abstract

Detailed temperature measurements among grape-vines, and in the inversion layer in the air overhead, are presented for two nights on which frost damage occurred. The temperatures are related to the varying degrees of damage suffered by the vines. It is concluded that the critical vine-shoot temperature was about 28½°F a t the stage of development of the vines at the time of observation. The air temperature a t the height of the vines was about 1°F higher