Hydrilla, a new noxious aquatic weed in California
AuthorsRichard R. Yeo
W. B. McHenry
Authors AffiliationsRichard R. Yeo is Botanist, Agricultural Research Service, U.S. Department of Agriculture, Davis; Walter B. McHenry is Weed Scientist, Cooperative Extension, UC, Davis.
Hilgardia 31(10):4-5. DOI:10.3733/ca.v031n10p4. October 1977.
Since about 1776 California has been continually plagued by the inadvertent introduction of foreign plants that spread rapidly and become weeds. Examples include crabgrass (both smooth and hairy), yellow starthistle, oxalis, bermudagrass, and johnsongrass.
Also in this issue:Guilt by association
Vineyard management and nematode populations
Biological control: Pitting insects against insects
Pesticide applications can be reduced by forecasting the occurrence of fireblight bacteria
Walnut varieties differ in susceptibility to codling moth damage
Jojoba wax extraction and bleaching
Controlling powdery mildew in field roses
Beet free periods—the key to higher sugar beet yields
New and redescribed species of Ledermuelleria from North America (Acarina: Stigmaeidae)