Table 6.

Percentage of fields where significant yield reductions occurred at different densities of the Agriotes wireworm species being studied (the average numbers of wireworms/trap were considered)

Wireworm species	Wireworm catches (larvae/trap)	Fields sampled (no.)	Fields with yield reduction (no.)	Fields with yield reduction (%)
Agriotes ustulatus	0	38	0	0.0
	0.1–1	25	0	0.0
	1.01–2	7	0	0.0
	2.01–5	9	0	0.0
	5.01–10	9	1	11.1
	>10.01	5	2	40.0
Agriotes brevis	0	21	0	0
	0.1–1	32	0	0.0
	1.01–2	6	2	33.3
	2.01–5	7	4	57.1
	>5.01	3	1	33.3
Agriotes sordidus	0	32	0	0.0
	0.1–1	83	0	0.0
	1.01–2	10	0	0.0
	>2.01	10	3	30.0

Bold values indicate the population levels that resulted in yield reduction