Pest

Sampling Method

Bean Leaf Beetle, Mexican Bean Beetle

Using a drop cloth placed between 2 rows, shake the plants in 6 foot row in 10 sites in a field, count the number of beetles found in 6 foot of row in each site, for Mexican bean beetle note the presence of pupae/eggs at each site, estimate defoliation at each site

Grasshoppers

Take 10 sweeps in 10 sites and count the number of adults and nymphs

Thrips

Examine 5 leaflets in 10 sites for the presence of thrips, check top and undersides of the leaves

Potato Leafhopper

Take 10 sweeps in 10 sites and count the number of adults and nymphs per 100 sweeps, sampling should be done when the foliage is dry

Growth Stage: Prebloom – Podset

Japanese beetle, Green Cloverworm, Silver Spotted Skipper

Using a drop cloth placed between 2 rows, shake the plants in 6 foot of row in 10 sites in a field, count the number of insects found at each site and estimate defoliation

 Spider Mites

Examine the underside of 5 leaflets in 10 sites for mites; also note the presence of mite eggs and note that amount of damage

Growth Stage: Podset – Maturity

Spider Mites

5 leaflets in 10 locations

Bean leaf beetle, Mexican bean beetle, Green cloverworm, Silver Spotted Skipper, Yellow Striped Armyworm, Beet Armyworm, Fall Armyworm

6 foot of row in 10 sites using a drop cloth

Corn Earworm

5 sweeps in 5 to 10 locations walking down the row