The carrot trial of random block design of 9 varieties with 4 replications was set up in MSU Muck farm, 2002. The trial was kept unspraying all the season. In June, cages were set up in each variety and 50 aster leafhoppers collected from surrounding fields were put into each cage. The cages were moved 3d later. In July, a repitition will be made. But the aster leafhoppers from rearing cages in the greenhouse on diseased asters will be transferred into field cages. In late season, both aster yellows in the cage covered and uncoverd area of each varitey will be evaluated.
Another similar trial was also set up for insecticide tests. 4 insecticides, Cyfluthrin, Thiamethoxam, Esfenvalerate and Imidacloprid were used to treat the plots of 2 varieties with 4 replications. 4 sprays of each insecticide were made in June and July. Cages were set up on the second day of spray and aster leafhoppers were put into the cage. The survival rate of aster leafhopper in each cage was recorded and aster yellows will be evaluated before harvest.
Some results of feeding behavior study (using EPG) of aster leafhopper on insecticide treated carrots may also be included.
Back to Display Presentations, Subsection Cc. Insect Vectors in Relation to Plant Disease
Back to Posters
Back to The 2002 ESA Annual Meeting and Exhibition