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

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/14522
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