View three presentations concerning threats posed to California avocado groves by new pests and diseases, including laurel wilt disease, fusarium dieback disease, the polyphagous shot hole borer and the Florida redbay ambrosia beetle.
A newly discovered beetle, the polyphagous shot hole borer beetle, is morphologically indistinguishable from the tea shot hole borer, and is believed to vector a new Fusarium sp. leading to Fusarium dieback disease that affects avocado trees.
There are three types of mites that feed on California avocado trees. All three of these mites damage avocado leaves by removing chlorophyll during feeding. Excessive feeding can lead to rapid loss of avocado leaves, effecting the number of avocado fruit on the tree.
Persea mites damage avocado trees by removing chlorophyll from the leaves when feeding. As a result, once 7.5-10% of the leaf surface is damaged, the leaves begin to drop. Because healthy leaves are critical to a healthy avocado tree and crop, persea mite damage can effect avocado growers’ profitability.
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