scholarly journals Host Specificity of Spurgia esulae Gagné (Diptera: Cecidomyiidae), a Gall Midge Introduced into the United States for Control of Leafy Spurge ( Euphorbia esula L. “Complex”)

1991 ◽  
Vol 20 (1) ◽  
pp. 282-287 ◽  
Author(s):  
P. Pecora ◽  
R. W. Pemberton ◽  
M. Stazi ◽  
G. R. Johnson
Keyword(s):  
United States ◽  
Host Specificity ◽  
Gall Midge ◽  
The United States ◽  
Leafy Spurge ◽  
Euphorbia Esula

scholarly journals The Distribution of Leafy Spurge (Euphorbia esula) and Other Weedy Euphorbia spp. in the United States

Weed Science ◽  
1979 ◽  
Vol 27 (5) ◽  
pp. 509-516 ◽  
Author(s):  
P. H. Dunn
Keyword(s):  
United States ◽  
Biological Control ◽  
The United States ◽  
Leafy Spurge ◽  
Economic Importance ◽  
Euphorbia Esula ◽  
Made In

A survey was made in the United States to determine the extent of the infestations of leafy spurge (Euphorbia esula L.) and other weeds of economic importance in the Euphorbiaceae. From introductions about 100 yr ago, leafy spurge is now found in 458 counties in 26 states from coast to coast. The infestations are out of control in some states, and biological control is mentioned as a possible solution to the problem.

First Recovery of Oberea erythrocephala on the Leafy Spurge Complex in the United States

Weed Science ◽  
1986 ◽  
Vol 34 (3) ◽  
pp. 395-397 ◽  
Author(s):  
Norman E. Rees ◽  
Robert W. Pemberton ◽  
Antonio Rizza ◽  
Pasquale Pecora
Keyword(s):  
United States ◽  
The United States ◽  
Leafy Spurge ◽  
Euphorbia Esula

The beetle Oberea erythrocephala, whose larvae mine stems and roots of leafy spurge (Euphorbia esula L. # EPHES), was introduced into Oregon, Montana, and Wyoming between 1980 and 1984. Although it was not recovered in Oregon and Wyoming, it became established at two of three release sites in Montana and appears to be accepting leafy spurge plants at a fourth.

Elaiosomes on Weed Seeds and the Potential for Myrmecochory in Naturalized Plants

Weed Science ◽  
1990 ◽  
Vol 38 (6) ◽  
pp. 615-619 ◽  
Author(s):  
Robert W. Pemberton ◽  
Delilah W. Irving
Keyword(s):  
United States ◽  
The United States ◽  
Leafy Spurge ◽  
Spotted Knapweed ◽  
Canada Thistle ◽  
Weed Seeds ◽  
Naturalized Plants ◽  
Bull Thistle ◽  
Diffuse Knapweed

Seeds of plants naturalized in the United States were examined for the presence of elaiosomes. Seeds of 47 species belonging to 13 families (Asteraceae, Boraginaceae, Dipsacaceae, Euphorbiaceae, Fabaceae, Fumariaceae, Lamiaceae, Liliaceae, Poaceae, Polygonaceae, Resedaceae, Rosaceae, and Solanaceae) were found to have elaiosomes, indicating that these species are probably mymecochorous, i.e., dispersed by ants. These include important rangeland weeds such as bull thistle, Canada thistle, musk thistle, diffuse knapweed, spotted knapweed, and leafy spurge. Myrmecochory in naturalized species may enhance their weediness in areas where they are established and assist their colonization of new and relatively closed communities.

Sign in / Sign up

Export Citation Format

Share Document