<SUBMISSION>
<ACCESSION-NUMBER>0001250853-09-000015
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20081231
<FILING-DATE>20090127
<DATE-OF-FILING-DATE-CHANGE>20090127
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>ALLEGRO BIODIESEL CORP
<CIK>0000895380
<ASSIGNED-SIC>2860
<IRS-NUMBER>205748331
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>6033 W. CENTURY BLVD
<STREET2>SUITE 1090
<CITY>LOS ANGELES
<STATE>CA
<ZIP>90045
<PHONE>3106702093
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>6033 W. CENTURY BLVD
<STREET2>SUITE 1090
<CITY>LOS ANGELES
<STATE>CA
<ZIP>90045
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>DIAMETRICS MEDICAL INC
<DATE-CHANGED>19930624
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Tacon William
<CIK>0001454684
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-21982
<FILM-NUMBER>09547604
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>284-494-9600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>PALM GROVE HOUSE, 2ND FLOOR
<STREET2>WICKHAMS CAY
<CITY>ROAD TOWN, TORTOLA
<STATE>D8
<ZIP>VG1110
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2008-12-31</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000895380</issuerCik>
        <issuerName>ALLEGRO BIODIESEL CORP</issuerName>
        <issuerTradingSymbol>ABDS.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001454684</rptOwnerCik>
            <rptOwnerName>Tacon William</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PALM GROVE HOUSE, 2ND FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2>WICKHAMS CAY</rptOwnerStreet2>
            <rptOwnerCity>ROAD TOWN, TORTOLA</rptOwnerCity>
            <rptOwnerState>D8</rptOwnerState>
            <rptOwnerZipCode>VG1110</rptOwnerZipCode>
            <rptOwnerStateDescription>VIRGIN ISLANDS, BRITISH</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3348397</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Monarch Pointe Fund, Ltd.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Series A Preferred Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9568319</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Monarch Pointe Fund, Ltd.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Warrant</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.14</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-09-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-09-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2213414</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Monarch Pointe Fund Ltd.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrant</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.33</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-09-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-09-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1290337</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Monarch Pointe Fund Ltd.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrant</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.65</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-09-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-09-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>923077</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Monarch Pointe Fund Ltd.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reporting Person is the court appointed liquidator of Monarch Pointe Fund, Ltd. (&quot;Monarch&quot;) pursuant to the order issued by the Eastern Caribbean Supreme Court, in the High Court of Justice, British Virgin Islands, and thereby has voting and investment control over the Issuer's securities owned by Monarch.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ William Tacon</signatureName>
        <signatureDate>2009-01-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
