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Study shows that customers ignore or don't discern some plant damage. Regular monitoring by a welltrained pest manager can reduce insecticide use in the nursery without reducing ornamental plant quality. Complete control of pests is not required to sell certain For the $450 million worth of woody ornamental plants sold each year by California nurseries, research on plant protection ranks as the number-one priority by members of the California Association of Nurserymen. Research is needed, said nursery owners in a 1990 survey, to develop effiplants, A case in point is a plant where customers Ignored Or did not recognize Some types of pest damage. tolerant and pest-resistant species. cient monitoring t e h q u e s and treatment guidelines that will facilitate safe, eco-Nurseries also must adapt to an increasing demand for California native, drought-sale at the uc Davis Arboretum, nomical production of quality plants* 4 CALIFORNIA AGRICULTURE, VOLUME 47, NUMBER 4

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