⁸ A. Dalzell, The Criticism of Didactic Poetry: Essays on Lucretius, Virgil and Ovid (Toronto, 1998) is a wise and accessible study (ch. 4 on Georgics) that should be better known outside Canada: see also K. Volk, The Poetics of Latin Didactic: Lucretius, Vergil, Ovid, Manilius (Oxford, 2002), ch. 4.