Grape Pest Survey – 3rd Week of April Through 1st Week of May

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— Written By Rocio Davila and last updated by

We have establishing grape pest monitoring locations and completed our first weeks of pest counts at three of our planned eight sites, and here we are reporting our observations for the past three weeks. As the temperature increases, the numbers of insect are slowly  increasing over the first weeks of scouting. At this time in the field, the canopy is filling in and grapevines are starting to bud.

The glassy winged sharpshooter, Phera insolita sharpshooter, and Oncometopia orbona sharpshooter are known vectors of Pierce’s disease, as well as the leafhopper, Graphocephala versuta. For additional information on the pest we are scouting, you can check out our first post on the 2019 Grape Survey methods.

This week, we established four more sites located in  Perquimans Co., Currituck Co., Johnston Co., and New Hanover Co.

Southwest 1 Field (Rowan Co.)

Date Three-cornered alfalfa hopper∗ Glassy-winged sharpshooter∗ Phera insolita∗ Graphocephala versuta∗ Oncometopia orbona∗ Average N° GBM/trap N° Spotted Lanternfly eggs♦ N° Spotted Lanternfly nymphs N° Spotted Lanternfly adults
3rd week April 0 0 0 0.3 0 0 0 0 0
4th week April 0 0 0 0.2 0 0 0 0 0
1st week May 0 0 0 0.2 0 0 0 0 0

∗ Average number per sticky trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 mt

Northwest 1 Field (Wilkes Co.)

Date Three-cornered alfalfa hopper∗ Glassy -winged sharpsooter∗ Phera insolita∗ Graphocephala versuta∗ Oncometopia orbona∗ Average N° GBM/trap N° Spotted lanterfly eggs ♦ N° Spotted lanterfly nymphs ♦ N Spotted lanterfly adults ♦
3rd week April 0 0 0 0.2 0 0 0 0 0
4th week April 0 0 0 3.3 0 0 0 0 0
1st week May 0 0 0 8 0 0 0 0 0

∗ Average number per sticky trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 mt

Northwest 2 Field ( Surry Co.)

Date Three-cornered alfalfa hopper∗ Glassy -winged sharpsooter∗ Phera insolita∗ Graphocephala versuta∗ Oncometopia orbona∗ Average N° GBM/trap N° Spotted lanterfly eggs per 2 transects of 100 mt N° Spotted lanterfly nymphs per 2 transects of 100 mt N° Spotted lanterfly adults per 2 transects of 100 mt
3rd week April 0 0 0 0.5 0 0 0 0 0
4th week April 0 0 0 0.3 0 0 0 0 0
1st week May 0 0 0 1.2 0 0 0 0 0

∗ Average number per sticky trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 mt

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