Bean, lima-Aphid

Includes

Bean aphid (Aphis fabae)
Green peach aphid (Myzus persicae)
Pea aphid (Acyrthosiphon pisum)
Potato aphid (Macrosyphum euphorbiae)

Pest description, crop damage and life history

See:

Management-biological control

Many parasites and predators attack aphids. Early year aphids have many natural enemies that frequently bring them under control later in the year. Among the more common predators are lady beetles and their larvae, lacewing larvae, and syrphid fly larvae. Populations of green peach aphids are reduced in winter by a parasitic fungus, Entomophthora aphidis.

Monitor the proportion of aphid mummies relative to unparasitized aphids and the numbers of predators such as lady beetles. If the proportion of mummies is increasing, or predators appear to be gaining control, and aphid populations are not yet damaging, avoid sprays that will disrupt these natural enemies. Most materials available for aphid control are highly disruptive of natural enemy populations.

Management-cultural control

Destroy infested crops immediately after harvest to prevent dispersal. Destroying weed hosts late in the year may help destroy overwintering populations. Aphid populations tend to be higher in crops that are fertilized liberally with nitrogen. Roguing diseased plants early may help slow the spread of aphid-vectored diseases. Home gardeners can often get effective control by washing aphids with a strong stream of water.

Management-chemical control: HOME USE

Apply to both tops and undersides of leaves.

  • acetamiprid
  • azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • imidacloprid
  • malathion
  • plant essential oils (rosemary, etc.)-Some formulations are OMRI-listed for organic use.
  • pyrethrins (often combined with other ingredients)-Some formulations are OMRI-listed for organic use.
  • spirotetramat
  • zeta-cypermethrin

Management-chemical control: COMMERCIAL USE

  • acephate (numerous products) at 0.5 to 1 lb ai/a. PHI 14 days, 1 days for lima beans harvested in succulent form. REI 24 hr. Do not feed treated vines. Do not exceed 2 lb ai/a per year.
  • acetamiprid (Assail) at 0.044 to 0.1 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Limit 3 applications per season. Do not exceed 0.3 lb ai/a per season.
  • Beauveria bassiana (Mycotrol O) at 0.25 to 1 quart/a. PHI 0 days. REI after spray dries. Some formulations are OMRI-listed for organic use.
  • bifenthrin (Brigade, Sniper) at 0.033 to 0.1 lb ai/a. PHI 3 days. REI 12 hr. Do not exceed 0.2 lb ai/a per year. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air. Toxic to fish.
  • borate complex (Prev-Am) as a 0.4% to 0.8% solution. Spray to complete coverage. PHI 12 hr. REI 12 hr. Retreatment interval 4 days. OMRI-listed for organic use.
  • chlorantraniliprole/lambda-cyhalothrin (Voliam Xpress) at 0.059 to 0.088 lb ai/a. PHI 7 days for edible podded and succulent shelled legumes, 21 days for dried shelled legumes. REI 24 hr. Minimum of 5 days between applications. Do not exceed a total of 31.0 fl oz of Voliam Xpress or 0.12 lb ai of products containing lambda-cyhalothrin or 0.2 lb ai of chlorantraniliprole per acre per growing season. Do not graze livestock or harvest vines for forage or hay.
  • cyfluthrin (Tombstone) at 0.01 to 0.015 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 14 days. Do not exceed 0.06 lb ai/a per season. Do not graze livestock or harvest for vines for forage or hay.
  • dimethoate (numerous products) at 0.25 to 0.5 lb ai/a. PHI 0 days when harvested mechanically. REI 48 hr. Do not feed treated vines.
  • esfenvalerate (Asana XL) at 0.03 to 0.05 lb ai/a. PHI 21 days. REI 12 hr. Do not exceed 0.2 lb ai/a per season. Dry beans only.
  • gamma-cyhalothrin (Proaxis) at 0.01 to 0.015 lb/a. PHI 21 days, dry shelled, 7 days, succulent. REI 24 hr. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air. Do not graze. Do not exceed 0.06 lb ai/a per season.
  • imidacloprid (Admire) at 0.25 to 0.375 lb ai/a soil applied only. PHI 21 days. REI 12 hr. Do not exceed 0.375 lb ai/a per season. Do not apply within 25 ft of an aquatic habitat.
  • imidacloprid (Provado, Prey) at 0.04 lb ai/a. PHI 7 days. REI 12 hr. Do not exceed 0.13 lb ai/a per season. Do not graze or harvest for feed. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air.
  • lambda-cyhalothrin (Warrior II) at 0.02 to 0.03 lb ai/a. PHI 7 days for green beans, 21 days for dry beans. REI 24 hr. Do not feed to or graze livestock. Do not exceed 0.12 lb ai/a per year. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air. Toxic to fish.
  • malathion (numerous products) at 1.5 lb ai/a. PHI 1 day. REI 12 hr. Do not graze or feed foliage to livestock.
  • methomyl (Lannate) at 0.45 to 0.9 lb ai/a. PHI 1 to 3 days for succulent beans, 14 days for dry beans, 3 days for feeding vines, 7 days for hay. REI 48 hr. Do not exceed 4.5 lb ai/a per season.
  • naled (Dibrom) at 0.94 lb ai/a. PHI 1 day. REI 48 hr. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air.
  • phorate (Thimet)-Do not exceed 1.5 lb ai/a. PHI 60 days. REI 48 hr, or 72 hr if annual rainfall is less than 25 inches. Apply at planting. Do not graze or feed to livestock. Toxic to fish and wildlife.
  • zeta-cypermethrin (Mustang Max; Mustang) at 0.02 to 0.025 lb/a (Mustang Max) or 0.04 to 0.05 lb ai/a (Mustang). PHI 1 day. REI 12 hr. Retreatment interval 5 days. Do not exceed 0.15 lb ai/a (Mustang Max) or 0.3 lb ai/a Mustang per season. Toxic to fish. Do not apply within 25 ft of an aquatic habitat, 150 ft if applied by air.