Insect pest-targeting gel composition and sustained release preparation comprising that

1. An insect pest-targeting gel composition comprising:

one or more volatile substances and

an oil gelling agent,

wherein the one or more volatile substances are comprised in an amount of from 70.0 to 99.0% by weight by the insect pest-targeting gel composition,

wherein the oil gelling agent is selected from the group consisting of a long-chain fatty acid, a dextrin fatty acid ester, a sucrose fatty acid ester, a fructooligosaccharide fatty acid ester, a benzylidene derivative of sorbitol, and wax, and

wherein the oil gelling agent is not a polyvalent metal salt of a long-chain fatty acid or 12-hydroxystearic acid.

2. The insect pest-targeting gel composition according to claim 1 , wherein the one or more volatile substances are selected from the group consisting of a pheromone substance, an attractant and a repellent.

3. A sustained release preparation comprising:

a vessel having an opening portion, and

the insect pest-targeting gel composition as claimed in claim 1 and introduced into the vessel,

wherein the vessel is made of a material not permitting penetration of the one or more volatile substances.

4. The sustained release preparation according to claim 3 , further comprising a film which covers the opening portion therewith and permits penetration of the one or more volatile substances.

5. The sustained release preparation according to claim 3 , wherein the insect pest is olive fruit fly ( Bactrocera oleae ).

6. The sustained release preparation according to claim 5 , wherein the volatile substance is 1,7-dioxaspiro[5.5]undecane.