Azealas disease - Knowledgebase Question

beverly hills, Fl
Question by triciam4
June 15, 2010
Azealas have lace wing and hollys have scale according to a lawn man. What is best way to treat them?

Answer from NGA
June 15, 2010


Lacewings can be controlled by rinsing them off the plants. Use a hard jet of water from a hose to dislodge the young nymphs as they hatch in the spring. The tiny nymphs often die before they can find their way back to suitable leaves. You can also encourage natural predators such as green lacewings, mites and assassin bugs by not using chemicals in your garden. Once the population of bad bugs gets large enough, a population of benefical insects usually arrive to feast on the bad guys. Or, you can use chemicals to control the pests. Insecticidal soaps are useful if contact with the nymphs is made. Be sure to cover the underside of the leaves where the nymphs are feeding. Additional applications may be needed to control nymphs hatching out of eggs laid late or if re-infestations occur from surrounding landscapes.

Scale insects on holly can be difficult to control because the insecticides that will control them can also harm the foliage of your holly. A summer weight oil spray such as Oilicide, Volck, or Sunspray will smother the insects by cutting off their oxygen supply. Pay very close attention to the label of the product you choose to use. When temperatures are too high, damage to plant material can occur with some oil-based products.

Hope this answers all your questions!

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