Master Gardener Laura Simpson writes about gardening in Southern California each week.
Q. I’ve noticed this white substance on my majesty palm, which is an indoor plant. I wipe them off, but they keep coming back. What is it and how can I get rid of it?. It also appears on outdoor plants, particularly citrus. It is a soft-bodied sucking insect that likes to hang out near the base of leaf petioles or, in the case of palms, in the nooks and crannies of the growing tips. The body of the insect is orange-brown, but the large white egg sac is the recognizable part.
If there are only a few scales, use a Q-tip soaked with rubbing alcohol and simply wipe away any visible insects. This process may need to be repeated every few days as new insects emerge. Horticultural oil or insecticidal soap may be effective, but spraying may not reach the culprits. AQ I have an orange tree that was in the backyard when I bought my house 10 years ago. It’s a naval orange but I’m not sure of the age.
In the past 3 seasons, it has gone through different changes. One year it had nice thick green leaves but only grew fruit on one side. Last season’s leaves were sparse and yellow and the fruit was small. This season we had the most flowers on it I ever seen but it’s the sickest I’ve ever seen it. It lost a lot of the tiny oranges but the ones that stayed on look healthy. The tree keeps losing leaves and getting yellow. I fertilize it twice a year and water it with 10 gal of water every weekend.
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