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Hop-Hop aphid

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Image related to Hop-Hop aphid
Hop aphid
Phorodon humuli Schrank
© Ken Gray Insect Image Collection
Image related to Hop-Hop aphid
Hop aphid
Phorodon humuli Schrank
Adult on host
© Ken Gray Insect Image Collection

Phorodon humuli

Pest description and crop damage Aphids overwinter as eggs on prune trees. Greenish to black, winged forms migrate to hops in May or June. Wingless forms on hops are pale yellowish green. They suck plant juices and excrete honeydew which can contaminate cones, especially when sooty mold colonizes the honeydew.

Management-chemical control

  • Beauveria bassiana (Botanigard ES, Mycotrol 0)-See label for rates. PHI 0 days. REI 4 hr. Apply when pests first appear. Repeat applications as needed. Some formulations are OMRI-listed for organic use.
  • Beauveria bassiana strain GHA (BotaniGard 22WP, BoteGHA ES, Mycotrol ESO) at 0.027 to 0.22 lb ai/A. Apply at 5- to 10-day intervals. 0-day PHI. Some formulations are OMRI-listed for organic use.
  • beta-cyfluthrin (Sultrus, Baythroid XL, Leverage 360) at 0.025 lb ai/A. Maximum sessional total 0.125 lb ai/A (beta-cyfluthrin), 0.25 lb ai/A (cyfluthrin). Group 3A insecticide.
  • bifenthrin (various formulations) at 0.06 to 0.1 lb ai/A. PHI 14 days. REI 12 hr. Do not exceed 0.1 lb ai/A per application or 0.3 lb ai/A per season. Minimum interval between applications is 21 days. Group 3A insecticide.
  • Burkholderia spp. strain A396 (Venerate XC)-See label for rates. PHI 0 days. REI 4 hr. Apply when pest populations are low. Repeat as needed. OMRI-listed for organic use.
  • Chromobacterium subtsugae strain PRAA4-1 (Grandevo)-See label for rates. PHI 0 days. REI 4 hr. Apply when pest populations are low. Repeat as needed. Some formulations are OMRI-listed for organic use.
  • cyfluthrin (various formulations) at 0.025 lb ai/A. PHI 7 days. REI 12 hr. Do not apply more than five times per crop season. Do not apply more than 0.125 lb ai/A per season of any formulation of cyfluthrin. Allow at least 14 days between applications. Group 3A insecticide.
  • flonicamid (BeLeaf 50SG) at 0.062 to 0.089 lb ai/A. PHI 10 days. REI 12 hr. Do not make more than three applications per season. Do not apply more than 0.089 lb ai/A per application or 0.267 lb ai/A per season. Group 9C insecticide.
  • flupyradifurone (Sivanto 200 SL) at 0.09 to 0.137 lb ai/A. PHI 21 days. REI 12 hr. Apply in a minimum of 25 gal per acre (ground) or 10 gal per acre (aerial). Do not apply more than 0.365 lb per acre per year. Group 4D insecticide.
  • imidacloprid (various formulations) to the soil at 0.1 lb ai/A to 0.3 lb ai/A. PHI 60 days. REI 12 hr. One application to the soil per season applied as (1) a drip irrigation, (2) a subsurface side dress shank irrigation, or (3) a hill drench. Follow side dress and shank applications by furrow or sprinkler irrigations to ensure incorporation into the root zone. Do not apply more than 0.3 lb ai/A per season of any imidacloprid formulation. Group 4A insecticide.
  • imidacloprid (various formulations) by ground or air at 0.1 lb ai/A. PHI 28 days. REI 12 hr. Allow at least 21 days between applications. Do not apply more than 0.3 lb ai/A per season of imidacloprid formulation. Group 4A insecticide.
  • imidacloprid/bifenthrin (Brigadier, Swagger) by ground or air at 0.06 to 0.20 lb ai/A. PHI 28 days. REI 12 hr. Do not apply more than 0.1 lb ai/A of imidacloprid or more than 0.1 lb ai/A of bifenthrin per application. Do not apply more than 0.30 lb ai/A of any bifenthrin formulation or 0.30 lb ai/A of any imidacloprid formulation per season. Group 4A/3A insecticides.
  • imidacloprid/beta-cyfluthrin (Leverage 360) by ground or air at 0.055 lb ai/A. PHI 28 days. REI 12 hr. Do not apply more than 0.125 lb ai/A of any beta-cyfluthrin formulation, more than 0.250 lb ai/A of any beta-cyfluthrin/cyfluthrin formulation or more than 0.30 lb ai/A of any imidacloprid formulation per season. Group 4A/3A insecticides.
  • malathion (various formulations) at 0.63 to 1.89 lb ai/A. See label for rates. PHI 7 to 10 days; check label. REI 12 hr. Group 1B insecticide.
  • naled (Dibrom 8E) at 0.9 lb ai/A. PHI 7 days. REI 48 hr. Up to five applications per season at 14-day intervals. Group 1B insecticide.
  • potassium salts of fatty acids (M-pede)-PHI 0 days. REI 12 hr. Some formulations are OMRI-listed for organic use.
  • pymetrozine (Fulfill) at 0.125 to 0.188 lb ai/A. PHI 14 days. Apply before aphids reach damaging levels. Do not apply at lower than recommended rates. Do not apply by air. Do not apply more than 0.188 lb ai per application. Do not exceed 0.56 lb ai per season. Allow at least 14 days between applications. Group 9B insecticide.
  • pyrethrins/azadirachtin (Azera) at 0.013 to 0.0044 lb ai/A azadirachtin/0.014 to 0.048 lb ai/A pyrethrins. PHI 0 days. REI 12 hr. Apply when pest populations first appear. Reapply every 5-7 days as needed up to 10 times per season. Do not apply more than 0.050 lb ai/A pyrethrins per season. Some formulations are OMRI-listed for organic use. Group 3A insecticide.
  • spirotetramat (Movento, Ultor) at 0.08 to 0.096 lb ai/A. PHI 7 days. REI 4 hr. Allow at least 14 days between applications. Do not apply more than 0.2 lb ai/A per season. Group 23 insecticide.
  • thiamethoxam (Platinum) at 0.125 lb ai/A. PHI 65 days. REI 12 hr. Apply (1) to the soil as a band on each side of the hop row, (2) by drip irrigation into the root zone, or (3) as a hill drench. Incorporate band and hill drench applications with irrigation within 24 hr. Do not exceed 0.125 lb ai/A per season. Group 4A insecticide.