Long tailed mealy bug
Date: 20 Apr 2005 Author: Jianhua Mo
- Adults are 3-4mm long with mealy wax cover and long tail filaments (as long as or longer than the body). When squashed, the body fluids are seen to be pale yellow.
- The female produces around 200 live young (which she deposits under her body) over a 2–3 week period.
- During summer the life cycle is completed in around 6 weeks (about 12 weeks in winter).
- There are three to four generations per year in NSW, VIC and SA.
- The honeydew produced by mealybugs encourages the growth of sooty mould, which downgrades fruit quality, and in severe cases lowers general tree health. Mealybugs are often found in sheltered sites.
- Fortnightly monitoring is critically important in November–December.
- Check five fruit per tree from ten randomly selected trees throughout the block.
- Examine under the fruit calyx and, in autumn, check the navels of navel oranges.
- parasitic wasps
- In navel oranges and grapefruit, action should be taken when 10% or more of the fruits are infested with mealybugs. Action level is 20% for all other varieties. In late November and early December, control is required if the action level is reached before calyx closure.
- Chemical control measures include petroleum spray oils (PSOs) (or PSO and a compatible pesticide) and soap sprays.
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