Grape Pest Survey – 4th Week of May

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— Written By Rocio Davila
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As we move towards the end of May, a few vineyards are still in blossom and others are setting fruit. We started catching the Grape Berry moth, Paralobesia viteana, in a field site in Johnston Co.

1st GBM capture in Johnston Co., 2019

1st GBM capture in Johnston Co., 2019. Photo credits: Matt Bertone, 2019

Leafhoppers and sharpshooters maintain their numbers compared to last week and seemed to be more abundant in the edges of the fields.

Also, our first catches of the three cornered alfalfa hopper, Spissistilus festinus, occurred at both Northeast and Southeast  fields. This insect is the vector of Grapevine red blotch associated virus (GRBV ).

TCAH

Three cornered alfalfa hoppers. Photo credits: IPMimages

For information on our last results, check out our previous post: Grape Pest Survey- 2nd and 3rd Week of May. To review our scouting methods check out: Grape scouting methods.

Southwest Field 1

Rowan County (Muscadine grapes)
15 April 22 April 29  May 7 May 14 May 20 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0 0 0 0 0
Three cornered alfalfa hopper (within field) 0 0 0 0 0 0
Three cornered alfalfa hopper (field edge) 0 0 0 0 0 0
Glassy -winged sharpshooter∗ 0 0 0 0 0 0
Phera insolita∗ 0 0 0 0 0 0
Graphocephala versuta∗ 0.3 0.2 0.2 0.7 0.2 0.2
Oncometopia orbona∗ 0 0 0 0 0 0
Grape berry moth∗ 0 0 0 0 0.2 0
Spotted lanternfly eggs 0 0 0 0 0 0
Spotted lanternfly nymphs 0 0 0 0 0 0
Spotted lanternfly adults 0 0 0 0 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

 Northwest  Field 1

Wilkes County (Vinifera grapes)
18 April 26 April 1  May 7 May 13 May 21 May
Three cornered alfalfa hopper (sticky traps) 0 0 0 0 0 0
Three cornered alfalfa hopper (within field)∗ 0 0 0 0 0 0
Three cornered alfalfa hopper (field edge) 0 0 0 0 0 0
Glassy -winged sharpshooter∗ 0 0 0 0 0 0
Phera insolita∗ 0 0 0 0 0 0
Graphocephala versuta∗ 0.2 3.3 8 21.6 8.2 19
Oncometopia orbona∗ 0 0 0 0.3 0.7 0.3
Grape berry moth∗ 0 0 0 0 0 0
Spotted lanternfly eggs♦ 0 0 0 0 0 0
Spotted lanternfly nymphs♦ 0 0 0 0 0 0
Spotted lanternfly adults♦ 0 0 0 0 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

Northwest  Field 2

Surry County (Vinifera grapes)
18 April 26 April 1  May 7 May 13 May 21 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0 0 0 0 0
Three cornered alfalfa hopper (within field) 0 0 0 0 0 0
Three cornered alfalfa hopper (field edge) 0 0 0 0 0 0
Glassy -winged sharpshooter∗ 0 0 0 0 0 0
Phera insolita∗ 0 0 0 0 0 0
Graphocephala versuta∗ 0.5 0.3 1.2 4.5 0.3 0.3
Oncometopia orbona∗ 0 0 0 0 0 0.3
Grape berry moth∗ 0 0 0 0 0 0
Spotted lanternfly eggs♦ 0 0 0 0 0 0
Spotted lanternfly nymphs♦ 0 0 0 0 0 0
Spotted lanternfly adults♦ 0 0 0 0 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

Northeast  Field 1

Perquimans County (Muscadine grapes)
8 May 15 May 22 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0 0
Three cornered alfalfa hopper (within field) 0 0 1
Three cornered alfalfa hopper (field edge) 0 0 0
Glassy -winged sharpshooter∗ 0 0 0
Phera insolita∗ 0 0 0
Graphocephala versuta∗ 2.3 0.5 0.3
Oncometopia orbona∗ 0 0.2 0.7
Grape berry moth∗ 0 0 0
Spotted lanternfly eggs♦ 0 0 0
Spotted lanternfly nymphs♦ 0 0 0
Spotted lanternfly adults♦ 0 0 0

∗ Average number per sticky trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

Northeast  Field 2

Currituck County (Vinifera grapes)
8 May 15 May 22 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0 0
Three cornered alfalfa hopper (within field) 0 0 0
Three cornered alfalfa hopper (field edge) 0 0 0
Glassy -winged sharpshooter∗ 0 0 0
Phera insolita∗ 0 0 0
Graphocephala versuta∗ 0.2 0 0
Oncometopia orbona∗ 0.5 0.5 0.2
Grape berry moth∗ 0 0 0
Spotted lanternfly eggs♦ 0 0 0
Spotted lanternfly nymphs♦ 0 0 0
Spotted lanternfly adults♦ 0 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

Southeast Field 1

 Johnston County (Muscadine grapes)
16 May 23 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0
Three cornered alfalfa hopper (within field) 0 0
Three cornered alfalfa hopper (field edge) 0 0
Glassy -winged sharpshooter∗ 0 0
Phera insolita∗ 0 0
Graphocephala versuta∗ 0.2 0
Oncometopia orbona∗ 0 0.2
Grape berry moth∗ 0 0
Spotted lanternfly eggs♦ 0 0
Spotted lanternfly nymphs♦ 0 0
Spotted lanternfly adults♦ 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

Southeast Field 2

 New Hanover County (Muscadine grapes)
16 May 23 May
Three cornered alfalfa hopper (sticky traps)∗ 0 0
Three cornered alfalfa hopper (within field) 0 0
Three cornered alfalfa hopper (field edge) 0 3
Glassy -winged sharpshooter∗ 0 0
Phera insolita∗ 0 0
Graphocephala versuta∗ 0 0
Oncometopia orbona∗ 0 0
Grape berry moth∗ 0 0
Spotted lanternfly eggs♦ 0 0
Spotted lanternfly nymphs♦ 0 0
Spotted lanternfly adults♦ 0 0

∗ Average number per trap

♦ Number  of Spotted Lanternfly per 2 transects of 100 m

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