Pest		Threshold	Reference
	cowpea aphid	30-40 aphids per sweep and few natural enemies present	UI CIS 748 (1992)
	grasshopper	8 or more per square yard found around field margin - border treatment	PNW 150 (1974)
	lygus bug	7 to 10 adults per 25 sweeps	UI Bulletin 664 (1987)
	pea aphid	30-40 aphids per sweep and few natural enemies present	UI CIS 748 (1992)
	pea leaf weevil dry peas (northern Idaho)	1 weevil for every two seedling plants; 1 clamshell leaf in 4 / weevil feeding damage at 2-4 leaf stage	UI CIS 883 (1991)
	pea weevil green peas for processing	1 weevil per 100 sweeps	UI CIS 885 (1992)
	dry peas	3 weevils per 50 sweeps	UI CIS 885 (1992)

Thresholds are not available for these pests: blue alfalfa aphid; cutworms/armyworms, -army cutworm, -black cutworm, redbacked cutworm, -spotted cutworm, -variegated cutworm, -western yellowstriped armyworm; loopers; lygus bugs; seedcorn maggot; two-spotted spider mite; two-spotted spider mite; wireworm.

References: UI CIS 748 Aphids on peas and lentils and their control, UI CIS 883 The pea leaf weevil, UI CIS 885 Pea weevil and its control.

Revised: August 12, 2008

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