Recognizing hemispherical scale:
adult scales are round, spherical and glossy brown in color. Under the scale cover an adult female produces a lot of eggs. These eggs hatch and young crawlers start moving around and spreading over the plant. The young stages are oval, flat and almost transparent yellow. Hemispherical scales you can often find sitting in a row along the veins on the underside of the leaf. The size that adult scales can reach depends on the host plant they live on.
Damage by hemispherical scale:
the scales suck plant juices which causes growth damage to the plant. Major damage is caused by the large amounts of honeydew that are produced by the scales. This honeydew is a food source for fungi, such as the black sooty mould. As a result, photosynthesis is hampered.
lifecycle hemispherical scale:
- hundreds of eggs per female
- several generations per year
- egg - adult: 8 weeks or longer
- males rare
host plants hemispherical scale:
- citrus as well as other fruit trees
PRODUCTS AGAINST HEMISPHERICAL SCALE;