Further Daphniphyllum alkaloids with insecticidal activity from the bark of Daphniphyllum macropodum M(IQ).

Two new Daphniphyllum alkaloids, macropodumines J and K (1 and 2, resp.), together with six known structurally related alkaloids, 3-8, were isolated from the bark of Daphniphyllum macropodum M(IQ). The structures of the new compounds 1 and 2 were elucidated on the basis of a comprehensive analysis of their spectroscopic and chemical data.

Early responses of resistant and susceptible potato roots during invasion by the potato cyst nematode Globodera rostochiensis.

Signals from roots of resistant (cv. Maris Piper) and susceptible (cv. Désirée) potato cultivars during invasion by second stage juveniles (J2s) of the potato cyst nematode, Globodera rostochiensis, were investigated.