Method, combination or composition for enhanced insecticidal, acaricidal and/or nematicidal activity

A method for:

• (i) controlling a pest or protecting a plant from a pest, said method comprising contacting soil, a pest, a plant and/or a plant part with at least one insecticide, acaricide and/or nematicide and glycine betaine;
• or
• (ii) enhancing the efficacy of at least one insecticide, acaricide and/or nematicide, said method comprising contacting soil, a pest, a plant and/or a plant part with at least one insecticide, acaricide and/or nematicide and glycine betaine;
• or
• (iii) reducing an amount of at least one insecticide, acaricide and/or nematicide applied to soil, a pest, a plant and/or a plant part needed to control a pest, comprising applying to the soil, the pest, the plant and/or the plant part the at least one insecticide, acaricide and/or nematicide in combination with glycine betaine.

A method:

• (i) for manufacturing a composition comprising mixing (a) at least one insecticide, acaricide and/or nematicide and (b) glycine betaine to obtain a composition comprising at least one insecticide, acaricide and/or nematicide and glycine betaine;
• or
• (ii) of formulating a composition for controlling a pest or protecting a plant from a pest, the method comprising:
• mixing glycine betaine and at least one insecticide, acaricide and/or nematicide, wherein the amount of the at least one insecticide, acaricide and/or nematicide in the composition is less than the amount of the at least one insecticide, acaricide and/or nematicide needed to control the pest or protect the plant from the pest in the absence of glycine betaine.