Effect of alkaloid-containing extracts obtained from the leaves of potatoes were tested against Spodoptera exigua moths. The following effects were checked: effect of alkaloids in substratum on the number of eggs laid by females, hatching success, preferences of insects in choosing the soaked or control substratum. We noticed significantly decreased egg-laying and limited hatching. When females had to chose between alkaloids-soaked substratum and the control ones, they preferred control ones. The observed changes show concentration-dependence, too. Therefore, we assume, that these extracts can have repellent and (limited) ovicidal activity. Our data suggest, that the research on the effects of these substances on insects should be continued, with a wide variety of substances and techniques used.
REPELLENT ACTIVITY OF SOLENACEAE ALKALOIDS AGAINST SPODOPTERA EXIGUA MOTHS
LELARIO, FILOMENA;SCRANO, Laura;BUFO, Sabino Aurelio
2010-01-01
Abstract
Effect of alkaloid-containing extracts obtained from the leaves of potatoes were tested against Spodoptera exigua moths. The following effects were checked: effect of alkaloids in substratum on the number of eggs laid by females, hatching success, preferences of insects in choosing the soaked or control substratum. We noticed significantly decreased egg-laying and limited hatching. When females had to chose between alkaloids-soaked substratum and the control ones, they preferred control ones. The observed changes show concentration-dependence, too. Therefore, we assume, that these extracts can have repellent and (limited) ovicidal activity. Our data suggest, that the research on the effects of these substances on insects should be continued, with a wide variety of substances and techniques used.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
