These light green, 1/8 inch long insects suck sap causing the leaves to curl and turn yellow and reddish brown. The plants are stunted. Use sprays of Diazinon(7), Malathion(3), Pyrethrin(1), Rotenone(1), or Methoxychlor(3). Applications of Sevin(0 to 3) may also be used.
Tarnished Plant Bug
Tarnished plant bugs are 1/4 inch long and brownish. There are 3 to 5 generations per year, each lasting 3 to 4 weeks. They suck sap from leaves and stems. Flower buds and pods drop if attacked. Use Sevin(0 to 3), Rotenone(1), or Pyrethrin(0).
Mexican Bean Beetle
The adults are orange and black beetles and the larvae are orange to yellow and look fuzzy or spiny. The insects skeletonize the leaves. Use Diazinon(7 to 14), Rotenone(1), Methoxychlor (3), Malathion(3), Pyrethrin(1) or Sevin(0 to 3).
Bean aphids are black, soft bodied insects about 1/16 inch long. They suck sap and carry bean mosaic. Use sprays of Malathion(0 to 3), Rotenone(1), Pyrethrin(1) or Diazinon(7 to 14).
The larvae are green with a white stripe on the sides and have 3 pairs of legs in the middle of the body. They chew holes in the leaves and pods. No chemical control is listed.
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|Mexican bean beetle, damage, adult, larvae - 66K|