Antifeedants against Hylobius abietis pine weevils : An active compound in extract of bark of Tilia cordata linden

• Linden (Tilia cordata) bark contains antifeedants effective against the large pine weevil, Hylobius abietis. Soxhlet extraction of inner and outer bark resulted in an extract which showed antifeedant activity in a micro-feeding assay. The extract was fractionated by chromatography on silica gel using gradient elution with solvents of increasing polarity. The content of the fractions obtained was monitored by thin layer- and gas chromatography. Fractions of similar chemical composition were merged. Two of the 17 fractions showed antifeedant activity in the micro feeding assay. Nonanoic acid was identified in both of these fractions. Subsequent testing in the micro feeding assay showed that nonanoic acid possessed strong antifeedant activity against H. abietis adults.

Ämnesord

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

NATURVETENSKAP  -- Kemi -- Organisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Nyckelord

Antifeedant

Curculionidae

Coleoptera

deterrent

extract

feeding

fractionation

Hylobius abietis

linden

nonanoic acid

outer bark

pelargonic acid

phloem

pine weevil

soxhlet

Tilia cordata.

Biology

Biologi

FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING

SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING

Chemistry

Kemi

Organic chemistry

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