Aster leafhopper

Aster, China. See Callistephus Aster leafhoppers. Coreopsis and, lb... 

Aster yellows phytoplasma is transmitted to chai hu plants from other infected plants in Alberta by aster leafhoppers Macrosteles sp.). These insects were commonly found associated with various economical crops in Alberta (Khadhair et al., 1997c). They are naturally capable of feeding on a wide range of plants and are highly mobile (Chang et al., 2004). 

The insecticidal activity and structure-activity relationships of novel pyrethroids prepared by reacting methyl phenyl substituted pyrazole methanols with dichloro chrysanthemic acid chloride are reported. These pyrethroids are active on tobacco budworm, fall armyworm, southern corn rootworm, and aster leafhopper, generally in the concentration range of 1000-250 ppm. Although less active than the pyrethroid standard bifenthrin, the overall structure-activity of these pyrazole pyrethroids with regard to substitution patterns is similar to that previously observed with bifenthrin analogs. 

TBW = Tobacco Budworm FAW = Fall Armyworm SCRW - Southern Corn Rootworm ALH = Aster Leafhopper... 

Leaves and flowers greenish yellow, distorted new growth spindly. Cause Aster yellows. Feeding leafhoppers may transmit this disease. There is no control for aster yellows. Remove and destroy infected plants do not compost them. Prevent the disease spread by controlling sucking pests such as leafhoppers and aphids. 

Young leaves are dwarfed, curled, or twisted. Cause Aster yellows. There is no cure for infected plants destroytthem. Control leafhoppers because they spread this disease. See Leaves pale plant stunted above for leafhopper controls. 

Sage is normally quite trouble-free. Aster yellows can cause dwarfed, abnormally colored leaves and bushy growth. Destroy infected plants, and control leafhoppers and other sucking insects that spread diseases. Tan or red blisters on leaves are caused by rust. Destroy infected leaves and avoid wetting leaves to prevent its spread. See the Herbs entry beginning on page 116 for other possible problems. 

Nickipatrick, W. (1965) The aerial migration of the six-spotted leafhopper and the spread of the virus disease aster yellows. Int. J. Bioclimat, Biomet., 9, 219-27. 

---