Insect Thresholds of Beans

Pest		Threshold	Reference
	lygus bug	1/2 to 1 bug per 25 sweeps	UI CIS 656 (1993)
	Mexican bean beetle	immediately contact the Idaho Department of Agriculture	UI CIS 302 (1993)
	two-spotted spider mites	treat if mites colonize fields 5 or more weeks before harvest, 45 - 60% of leaves with mites	UI CIS 656 (1993) E. J. Bechinski, unpublished data from Kimberly, ID
	western bean cutworm	use annual damage predictions from BEACON light trap network	UI CIS 302 (1993)

Thresholds are not available for these pests: bean aphid; beet leafhopper; clover leaf weevil; corn earworm; cutworms/armyworms, -army cutworm, -bertha cutworm, -black cutworm, -spotted cutworm, -variegated cutworm, -western yellowstriped cutworm; false chinch bug; garden symphylan; grasshoppers/crickets; loopers; seedcorn maggot; thrips; wireworm.

References:  UI CIS 656 Control of insect pests of beans, UI CIS Western bean cutworm on beans and corn.

Revised: August 12, 2008

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