Additional discoveries of the devastating tree disease huanglongbing in urban neighborhoods in the Los Angeles area have California citrus growers on high alert. University of California Cooperative Extension advisers are urging all citrus growers to monitor their trees for disease symptoms as they conduct research on possible solutions. For instance, a team at UC-Davis is working to fuse two immunosuppressive genes that attack the disease in different ways to make the plant more effective in fighting the disease, while scientists at UC-Riverside are working with Florida researchers to develop a rootstock with natural resistance to HLB.
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