Insect Development Calendar for Lawns:

Adults present and egg laying:

European Chafer from 3/4 June to end of July,
Japanese Beetle from 3/4 June to mid August,
June Beetle (Year 1) from mid May to almost end of June,
Hairy Chinch Bug from beginning of June to 1/4 July,
Turfgrass Scale from 3/4 May to end of June,
Sod Webworm from beginning of April to 3/4 May and from 1/4 July to end of August,
Bluegrass Bilibug from mid May to end of July.

Period of larval feeding:

European Chafer from beginning of April to 1/4 June and from mid August to mid November,
Japanese Beetle from 3/4 April to 1/4 June and from mid August to mid October,
June Beetle (Year 1) from beginning of August to 1/4 September,
June Beetle (Year 2) from mid April to 1/4 September,
June Beetle (Year 3) from mid April to end of May,
Hairy Chinch Bug from beginning of June to end of August,
Turfgrass Scale from 3/4 April to 3/4 May and from 3/4 July to end of August,
Sod Webworm from 3/4 April to 3/4 May, beginning of June to 1/4 July, and from 3/4 August to end of September,
Bluegrass Bilibug from 3/4 June to mid August.

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