Miles O’Brien:

She spends about 90 percent of her time focused on the biggest threat of all, the Asian citrus psyllid, which spreads the bacteria that causes a disease called Huanglongbing, also known as citrus greening.

It first hit Florida in 2005 and has since decimated much of the citrus crop there. But, so far, the dreaded Huanglongbing disease has only appeared in some backyards in greater L.A., not in any commercial groves.

California citrus growers say they need to keep the pesticide in their arsenal. They say it might come in handy as they try to avoid a repeat of the devastation in Florida.