Tobacco Insect Scouting Report. June 26, 2014

— Written By tcmclamb and last updated by
Larger plants present this week. Photo: Cameron McLamb

Larger plants present this week. Photo: Cameron McLamb

It is our ninth week of scouting, and we are starting to see higher numbers of tobacco budworms at all locations. We have observed a few other insects, such as Japanese Beetles and stink bugs but not at levels that cause concern. Thrips have also decreased quite substantially throughout all sites, and tomato spotted wilt virus incidence is well below 10%, the point at which we become concerned about this disease.

Scouting Report, Eastern 1 – Grower Standard Field

6% tobacco budworm budworm infested plants – No Treatment 0 – No treatment0 – No treatment0.04 Japanese beetles/plant

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infested plants Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No treatment  0 beetles/plant – No treatment

Scouting Report, Eastern 2 – IPM Field

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Insect observationNo. aphid infested plantsFlea beetles/plantPercent tobacco budworm  infested plantsHornworms/plantPercent cutworm damaged plantsOther insectsTreatment needed?0 – No Treatment0 beetles/plant – No treatment8% tobacco budworm infested plants – No treatment 0 hornworms/plant – No treatment0 – No TreatmentNone Observed

Scouting Report , Eastern 3 – Grower Standard Field

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infested plants Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No treatment  0 beetles/plant – No treatment 8% tobacco budworm budworm infested plants – No treatment 0 – No treatment 0 – No treatment 0.025 stink bugs per plant1 minute pirate bug (beneficial) observed

Scouting Report, Eastern 4 – IPM Field

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm  infested plants Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No Treatment 0 beetles/plant – No treatment 23% tobacco budworm infested plants – Treatment Recommended 0 hornworms/plant – No treatment 0 – No Treatment None observed

Scouting Report Piedmont 1 – Grower Standard Field

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infested plants Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No treatment  0 – No treatment 40% tobacco budworm infested plants – Treatment Recommended 0.075 hornworms/plant – No treatment 0 – No treatment None observed

Scouting Report, Piedmont 2 – IPM Field

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm  infested plants Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No Treatment 0 – No treatment 34% tobacco budworm infested plants – Treatment Recommended 0.06 hornworms/plant – No treatment 0 – No Treatment None observed

Here are the scouting reports from the control plots for our experiments at the Upper Coastal Plain Research Station near Rocky Mount, NC and the Lower Coastal Plain Research Station near Kinston, NC. For some of these experiments, the control plots receive no insecticide treatments for the entire season. For some of the experiments, we are interested in only caterpillar pests so all plants in the experiment, including the control plots, are treated in the greenhouse with imidacloprid to prevent other early season pests.

On Station, Kinston – Control plants with no insecticide treatment

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infestation Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0% aphid infested plants – No Treatment 0 beetles/plant – No treatment 75% budworm infested plants – No treatment** 0 – No treatment 0 – No Treatment 5% of plants infected with Tomato spotted wilt virus

On Station, Kinston – Control plants treated with imidacloprid

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infestation Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No Treatment 0 beetles/plant – No treatment 82% budworm infested plants – No treatment** 0 – No treatment 0 – No Treatment 5% of plants infected with TSWV

On Station, Rocky Mount – Control plants with no insecticide treatment

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infestation Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No Treatment 0 beetles/plant – No treatment 5% budworm infested plants – No treatment 0% Hornworm infested plants – No treatment 0 – No Treatment 2% of plants infected with TSWV

On Station, Rocky Mount – Control plants treated with imidacloprid

Insect observation No. aphid infested plants Flea beetles/plant Percent tobacco budworm infestation Hornworms/plant Percent cutworm damaged plants Other insects
Treatment needed? 0 – No Treatment 0 – No treatment 6% budworm infested plants – No treatment 0 – No treatment 0 – No Treatment 1% of plants infected with TSWV

** Plots were not treated due to the experiment, but experimental plots with similar amounts of budworm infestation, were treated. 

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