Start Date

4-12-2003 12:00 AM

Description

The first significant occurrence of Soybean Aphid activity in northeast Iowa was in 2001. Significant populations of aphids, in some cases exceeding 10,000 aphids per plant, were found across approximately 200,000 acres of soybeans in northeast Iowa. For those that treated for the pest, the typical yield response to foliar insecticide applications was about 10 bushel per acre. Net return to treatment averaged $35 per acre for an approximate recovery of $5 million of income from the potential $10 million of damage being caused by the pest. Not everyone treated for the pest because the potential damage from soybean aphid was largely unknown. In 2002, soybean aphids once again appeared in northeast Iowa. Populations did not appear to approach levels where insecticide treatments would be recommended. However, the general presence of soybean aphid was noted across the entire state, not just northeast Iowa.

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Dec 4th, 12:00 AM

Three Years of Soybean Aphid Activity in Northeast Iowa

The first significant occurrence of Soybean Aphid activity in northeast Iowa was in 2001. Significant populations of aphids, in some cases exceeding 10,000 aphids per plant, were found across approximately 200,000 acres of soybeans in northeast Iowa. For those that treated for the pest, the typical yield response to foliar insecticide applications was about 10 bushel per acre. Net return to treatment averaged $35 per acre for an approximate recovery of $5 million of income from the potential $10 million of damage being caused by the pest. Not everyone treated for the pest because the potential damage from soybean aphid was largely unknown. In 2002, soybean aphids once again appeared in northeast Iowa. Populations did not appear to approach levels where insecticide treatments would be recommended. However, the general presence of soybean aphid was noted across the entire state, not just northeast Iowa.