Developmental Rates of the Native Milfoil Weevil, Euhrychiopsis lecontei, and Damage to Eurasian Watermilfoil at Constant Temperatures

1999 ◽  
Vol 16 (2) ◽  
pp. 139-143 ◽  
Author(s):  
Kristine C Mazzei ◽  
Raymond M Newman ◽  
Alyson Loos ◽  
David W Ragsdale
Keyword(s):  
Eurasian Watermilfoil ◽  
Euhrychiopsis Lecontei ◽  
Developmental Rates ◽  
Milfoil Weevil

A field test on the effectiveness of milfoil weevil for controlling Eurasian watermilfoil in Wisconsin lakes

Hydrobiologia ◽  
2017 ◽  
Vol 800 (1) ◽  
pp. 81-97 ◽  
Author(s):  
John E. Havel ◽  
Susan E. Knight ◽  
Kristopher A. Maxson
Keyword(s):  
Field Test ◽  
Eurasian Watermilfoil ◽  
Milfoil Weevil

Fish predation on Eurasian watermilfoil (Myriophyllum spicatum) herbivores and indirect effects on macrophytes

2006 ◽  
Vol 63 (5) ◽  
pp. 1049-1057 ◽  
Author(s):  
Darren M Ward ◽  
Raymond M Newman
Keyword(s):  
Aquatic Plant ◽  
Field Experiments ◽  
Field Survey ◽  
Myriophyllum Spicatum ◽  
Fish Predation ◽  
Insect Herbivores ◽  
Eurasian Watermilfoil ◽  
Euhrychiopsis Lecontei ◽  
Herbivore Density ◽  
Invasive Aquatic Plant

We assessed the effect of fish predation on native and naturalized insect herbivores of the invasive aquatic plant Eurasian watermilfoil (Myriophyllum spicatum) using manipulative field experiments within lakes and a field survey across lakes. For the field experiments, we manipulated sunfish (Lepomis spp.) density in cages in the littoral plant beds of two contrasting lakes: one with many sunfish, few watermilfoil herbivores, and abundant Eurasian watermilfoil; and one with few sunfish, many herbivores, and little Eurasian watermilfoil. Watermilfoil herbivores, including the milfoil weevil (Euhrychiopsis lecontei) and aquatic caterpillars, were suppressed by fish in both experiments. Herbivore density was also negatively related to sunfish abundance in the multiple-lake survey. We conclude that abundant sunfish can strongly suppress watermilfoil herbivores. Furthermore, in one of our experiments there was a marginally significant effect of fish exclosure on watermilfoil, suggesting that fish suppression of watermilfoil herbivores can have a positive, indirect effect on plant growth. Fish predation on macrophyte herbivores may be an important trophic interaction in freshwater lakes.

Effects of a potential biocontrol agent, Euhrychiopsis lecontei, on Eurasian watermilfoil in experimental tanks

1996 ◽  
Vol 53 (3-4) ◽  
pp. 131-150 ◽  
Author(s):  
Raymond M. Newman ◽  
Kerry L. Holmberg ◽  
David D. Biesboer ◽  
Barbara G. Penner
Keyword(s):  
Biocontrol Agent ◽  
Eurasian Watermilfoil ◽  
Euhrychiopsis Lecontei ◽  
Potential Biocontrol Agent
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