In order to isolate other insecticidal podophyllotoxin compounds from the berries of Sabina vulgaris Ant.,six podophyllotoxin compounds were isolated by tracing with insecticidal activity.They were identified as acetyl Picropodophyllotoxin,deoxyPicropodophyllotoxin,acetyl epipodophyllotoxin,podophyllotoxin,deoxypodophyllotoxin and Picropodophyllotoxin.
METHODS AND RESULTS:
The antifeeding activities against the 3rd-instar larve of Mythimna separate W.and the toxic activities against the 4th-instar larvae of Pieris rapae L.and the 3rd-instar larve of Plutella xylostella L.were tested by leaf-disk method and leaf-dipping method,respectively.The bioassay results indicated that all these compounds showed highly antifeeding and toxic activities against the 3 tested insects.Podophyllotoxin and deoxypodophyllotoxin were the two with the highest insecticidal activities among the six,while Picropodophyllotoxin was the lowest.Besides,acetyl Picropodophyllotoxin,deoxyPicropodophyllotoxin,acetyl epipodophyllotoxin and Picropodophyllotoxin were insecticidal compounds firstly reported from S.vulgaris. |
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