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Sunday, November 23, 2014

Grubs Feeding on Lantana

Q. This season our Lantana has done poorly. For each plant we dig up there appears a bunch of grubs. What's going on?

A. I was alerted to this problem by a reader. The Lantanas were not doing well. That is surprising because they grow like weeds in the Mojave desert with a little bit of soil improvement, fertilizer and water. 

When they dug this Lantana to replace it, they found these grubs in the hole. Grubs like to feed on soft, succulent plant roots. They are general feeders so they will munch on many different plant roots. Fortunately they are pretty easy to control with traditional pesticides as a liquid a soil drench and organic pesticides. 

The organic pesticides that seem to work on a natural oil-based products such as thyme oil, Rosemary oil and others. They can also be controlled with insecticides made from bacteria or beneficial nematodes. They come in a variety of trade names but look for them in your organic section of the pesticides.

Grubs that were feeding on the roots of a Lantana. Taken by the reader.

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