Southeastern U.S. Vegetable Crop Handbook - 2022 - 63

Aphids: Treat only if aphids are well-distributed throughout the
field (50% or more of terminals with five or more aphids), when
weather favors population increase, and if beneficial species are
lacking.
Leafhoppers: Treat only if the number of adults plus nymphs
exceeds 1 to 2 adults per sweep.
Tarnished Plant Bug (Lygus): Treat only if the number of
adults and/or nymphs exceeds 15 per 50 sweeps from the pin
pod stage until harvest.
Beet Armyworm (BAW), Cabbage Looper (CL): Treat if the
number of worms (BAW and CL) averages 15 per 3 feet of row.
European Corn Borer (ECB)-Snap Beans Only: Treat when
moth catches in local blacklight traps average five or more per
night. The first application should be applied during the bud-
early bloom stage and the second application during the late
bloom-early pin stage. Additional sprays may be needed between
the pin spray and harvest. Consult a pest management
specialist for local black- light trap information and recommended
spray intervals.
Corn Earworm (CEW), Fall Armyworm (FAW): In snap beans,
treat every 5 to 7 days if CEW catches in local blacklight traps
average 20 or more per night and most corn in the area is mature.
The use of pheromone (insect sex attractants) and blacklight
traps is very helpful in detecting population build-up of
various insects.
For limas, treat when CEW populations exceed one per 6
feet of row from the late flat pod stage to harvest.
For both lima bean types, treatment should be timed when
50% or more of the CEW and/or FAW populations reach a
length of 1/2 inch or longer. Treating too early for young CEW/
FAW populations will eliminate natural control and may result in
the need for additional sprays for reinfestations. Consult a pest
management specialist for more refined decision-making.
Whiteflies: Treat when whiteflies exceed five adults per fully
expanded leaflet.
Nematode Management. Use nematicides listed n the " Nematode
Control in Vegetate Crops " table in the Disease Control
section.
Soybean cyst nematode, races I and III, are present in soybeans
in some areas. Snap beans are susceptible, but small seeded
lima beans are resistant to this nematode. Growers who rotate
snap beans with soybeans should be alert to the possibility of
problems in infested fields.
WEED CONTROL
Since beans are a quickly maturing crop, early weed control is
essential. Weeds can reduce yield, quality and the efficiency
of the mechanical harvester. Preparing a weed-free seedbed is
the first step of a weed control program. A weed-free seed bed
allows the bean plants to get off to a quick start without interference
from weed growth. Carefully read herbicide labels to
make sure that beans can tolerate the material. Be sure to avoid
planting beans after other crops for which herbicides with a long
residual have been used.
MINIMUM TILLAGE
When planning to use minimum tillage practices, give consideration
to bean variety, date of planting, soil fertility practices,
insect control, planting equipment, cover crop, and weed species
in the field. Minimum tillage might not be suited to all growing
areas around the SE US. Soil type and other environmental conductions
might limit its success. Consult with your local Extension
office for the latest recommendations.
HARVESTING AND STORAGE
See Table 14 for postharvest information.
2022 Vegetable Crop Handbook for Southeastern United States
63
Southeastern U.S. Vegetable Crop Handbook - 2022

Table of Contents for the Digital Edition of Southeastern U.S. Vegetable Crop Handbook - 2022
