Effect of Steroidal Glycoalkaloids on Hatch and Reproduction of the Potato Cyst Nematode .

Steroidal glycoalkaloids (SGAs) are phytoanticipins found in crops that act as the first line of chemical defense against pathogen attacks. , a trap crop for potato cyst nematodes, has been shown to effectively reduce populations of . . contains α-solamargine and other solasodine-type glycoalkaloids that may contribute to plant defenses. This study evaluated the influence of SGAs on . hatch, development, and reproduction. Exposure to α-solamargine and α-solamarine reduced . hatch by 65 and 87%, respectively. Exposure of . cysts with the glycoalkaloids α-solamargine and solasodine significantly reduced infection in susceptible potato 'Russet Burbank' by 98 and 94% compared with the control. Exposure of cysts to either solasodine or solamargine significantly reduced reproduction of . on 'Russet Burbank' by 99% compared with the control. The study demonstrated the deleterious effect of SGAs on . hatch, infection, and reproduction.