We are aware of one VenturaĬounty grower who experienced an 8% decrease in pack-out of lemons due to rind injury. May be laid in fruit rind, making the fruit unmarketable. After hatching inġ to 2 weeks, the old egg blister appears as a tan to brown scar. The upper leaf surface above theseīlisters may be marked over time by a yellowish elongated blotch. Lower leaf surface and appear as greenish blisters. These sausage-shaped eggs are laid within host plants inside the epidermis of the Trap (9 inches x 7 inches) catches of STSS peaked at 10 individuals per day in June,Īdult GWSS live several months and lay small eggs side by side in groups of aboutġ0, but ranging from one to as many as 27 ( Turner and Pollard 1959). In Palm Desert (eastern Riverside County), yellow sticky Similar numbers of GWSS were trapped in Orange County, yet only aįew STSS were trapped there. Inches x 7 inches) catches of adults ranged from a mean of less than 1 per day inĭecember to a high of approximately 22 GWSS and 12 STSS individuals per day from July At UC Riverside (western Riverside County), yellow sticky trap (9 Sticky traps (10 inches by 3 inches), and again during July through August at eight In VenturaĬounty, numbers of GWSS peaked in late spring at three sharpshooters per day on yellow Occurs in late winter to early spring, and again in mid-to-late summer. We have documented two generations of GWSS per year in Southern California. Native or feral plants including laurel sumac, tree tobacco, sycamore and oak. Myrtle, philodendron, Chinese elm, ash, macadamia, birch, eucalyptus, hibiscus and It also reproduces on ornamentals such as box wood, crape We have noticed it reproducing on various crop plants in Southern California includingĬitrus, avocado and grape. In 35 families ( Turner and Pollard 1959). The host list of the GWSS includes 73 plant species In the drier areas of Southern California, from Riverside to the Coachella Valley.īoth sharpshooter species have a large host-plant range and are frequently found onĬitrus in western Riverside County. The smoke tree sharpshooter (STSS) is slightly smaller, and is distributed mainly The native smoke tree sharpshooter ( Homalodisca lacerta), which has pale wavy lines instead of spots ( Gill 1995). These spots distinguish the glassy-winged sharpshooter from its close local relative, Head and thorax are brown or black with numerous small ivory-to-yellowish spots ( Nielson 1968). The glassy-winged sharpshooter, Homalodisca coagulata, is a large leaf-hopper, roughly 1/2-inch long, and generally brown to black when This past summer, we have observed the GWSS for the first time in citrus San Diego, Orange, Riverside, San Bernardino, Los Angeles, Ventura and Santa BarbaraĬounties. This insect can now be found in high populations in areas of Since then, the number of GWSS has continued to increase as it spreads throughout States before 1990 as eggs on nursery stock, was first observed in Orange and VenturaĬounties ( Sorensen and Gill 1996). The glassy-winged sharpshooter (GWSS), likely introduced from the southeastern United Most peopleĪre horrified to note that these droplets are the excretions of a plant feeding insect. Initiated by “sharpshooter rain” - tiny droplets of liquid landing on one's head orįace while sitting or standing under a sharpshooter-infested tree or arbor. Glassy-winged sharpshooter nymphs are smaller and lighter colored than the adults.Ī Southern Californian's introduction to the glassy-winged sharpshooter is usually
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