Q: I am a landscape professional, and I’ve seen an influx of camellia leaf gall and more azalea leaf gall starting to show up. It is appearing on multiple properties that I maintain from Stone ...

American Journal of Botany, Vol. 3, No. 7 (Jul., 1916), pp. 337-360 (26 pages) 1. The Phylloxera vastatrix leaf gall starts to develop on embryonic bud leaves. In twenty-four hours the insect produces ...