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Classical and augmentative biological control against ... - IOBC-WPRS

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Chapter 4<br />

SCLPs are included in annex I as a group but 25 compounds of this group are also listed<br />

individually. In the inclusion directive 2008/127/EC, some molecules are mentioned three times, as<br />

an individual substance, in a blend of the same type, e.g. acetates <strong>and</strong> in mixed blends, e.g. alcohols<br />

<strong>and</strong> acetates. Often single SCLP compounds show attraction to one or more moth species <strong>and</strong><br />

typically a combination of two or more of these compounds in a precise ratio enhances the<br />

attraction <strong>and</strong> the specificity. Thus SCLPs should be considered as a whole group <strong>and</strong> it must not be<br />

concluded that each compounds st<strong>and</strong>s for one species.<br />

The SCLPs listed individually are typical examples found in the pheromone blends of moth<br />

pest species currently of economic importance. A large variety of compounds <strong>and</strong> isomers, an<br />

estimated number of about 300 identified molecules, used by Lepidopterans are not listed here.<br />

They differ in carbon chain length, in the number of double bonds <strong>and</strong>/or their positions <strong>and</strong> in their<br />

chemical functional group (alcohol, acetate or aldehyde). SCLPs can be used for mass trapping,<br />

mating disruption or in attract <strong>and</strong> kill devices (A&K) or formulations. When associated with an<br />

insecticide, i.e in A&K products, attractants do not need to be included in annex I.<br />

Two non SCLP pheromones, (Z)-13-Hexadecen-11yn-1-yl acetate <strong>and</strong> (Z,Z,Z,Z)-7,13,16,19-<br />

Docosatetraen-1-yl isobutyrate, as well as four semiochemicals other than pheromones attractive to<br />

different fly (Diptera) species are listed in the EU Pesticides Database: Ammonium acetate,<br />

hydrolysed proteins, putrescine (1,4-diaminobutane) <strong>and</strong> Trimethylamine hydrochloride.<br />

Other Plant Protection substances of natural origin<br />

This group has been created for the purpose of the survey. It includes mineral substances as well as<br />

substances produced by or derived from animals or from micro-organisms. Thus very diversified<br />

substances <strong>and</strong> products like limestone powder, kaolin as well as diatomaceous earth (Kieselguhr),<br />

fatty acids <strong>and</strong> their derivates (e.g. soaps) can be found in this group. Not all substances of this<br />

group do meet the expectation of low non-target toxicity <strong>and</strong> low environmental impact.<br />

Some active substances included in annex I are produced by micro-organisms. Spinosad which<br />

is produced by the bacterium Saccharopolyspora spinosa finds its place here; it is accepted for<br />

organic farming. Milbemectin is a mixture of natural compounds (milbemycins) isolated from<br />

fermentation broth of the fungus Streptomyces hygroscopicus subsp. aureolacrimosus. The<br />

substance is active <strong>against</strong> insects of different families <strong>and</strong> a large range of mites. Abamectin<br />

contains avermectins which are biosynthesised by Streptomyces avermitilis. The substance shows<br />

very high toxicity in Mammals <strong>and</strong> in aquatic organisms. Milbemectin <strong>and</strong> abamectin are not<br />

authorised in organic crop protection.<br />

Potassium hydrogen carbonate is a slightly basic substance used for its fungicidal properties.<br />

The US FDA considers this substance as GRAS (Generally Recognised as Safe). Six natural<br />

substances are specifically marked in the EU List, they are used as animal repellents: three are<br />

minerals (Calcium carbonate, limestone, sodium aluminium silicate), two are of animal origin (fish<br />

oil <strong>and</strong> sheep fat) while methyl nonyle ketone is either produced by synthesis or extracted from<br />

plant oils (rue). The latter repellent acts by its strong odour. It is naturally present in some edible<br />

crops <strong>and</strong> spices.<br />

Limit cases <strong>and</strong> exclusions<br />

With regards to their (eco)toxicological profile <strong>and</strong> environmental impact neither sulphur <strong>and</strong> its<br />

derivates (iron sulphate) nor cupric compounds i.e. Bordeaux mixture, copper hydroxide, copper<br />

oxichloride <strong>and</strong> cuprous oxide are considered here as typical <strong>biological</strong> substances although they<br />

might be accepted in organic agriculture.<br />

Tall oils (crude or pitch) are a by-product in the Kraft process used in the paper industry. Thus<br />

they are substances resulting from a chemical process <strong>and</strong> are classified as chemicals here. Calcium<br />

carbide is produced from lime <strong>and</strong> coke in electric arc furnaces. It is fitted among chemicals but is<br />

used as a repellent like some other minerals. 1-Methyl-cyclopropene is an inhibitor of the effects of<br />

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