For καῦσιν, “burning,” Morel and Milles, with Cod. Coisl., read καῦστιν, a rare word explained by Hesychius as the “growth” or “foliage” of the vine:  but this is fully expressed in what follows, and the reading καῦσιν is confirmed by Virgil (Georg. ii. 408):  “Primus devecta cremato sarmenta” (Reischl).