Ongoing research

Ozone reduces plant growth, yield of horticultural and agronomic products, and beauty of ornamental vegetation. But the mechanism of ozone damage is not well understood. As a result, methods to protect plants are not available.

Ozone inhibits phloem loading from a transport pool: Compartmental efflux analysis in Pima cotton Ozone impacts on allometry and root hydraulic conductance are not mediated by source limitation nor developmental age Effect of ozone on hydraulic architecture in Pima cotton Estimating canopy conductan...

Fruit freezing injury Skin discoloration, inking, staining, black staining Internal browning, chilling injury, dry fruit, mealiness, woolliness Occurrence Freezing injury can be encountered in fruit that are purposely stored at near their freezing point or some accidental exposure to subfreezing tem...

Optimum procedures for ripening kiwifruit Optimum procedures for ripening stone fruit Preconditioning guidelines for kiwifruit shippers Key to delicious tree fruit is keeping it out of the killing zone...

Plant Protection Quarterly was published by the Plant Protection Group and UC Integrated Pest Management Program at the Kearney Agricultural Research and Extension Center from 1991 to 2008.

Walt Bentley To provide biological and monitoring information on the major pests of stone fruit and population dynamics for some beneficials, recent research publications, and links to other University of California sites.

Adult peach twig borer Small larvae of peach twig borer (Anarsia lineatella) are almost white with a distinct black head. As larvae mature they become chocolate brown with alternating dark and light bands around the abdomen.

Monitoring Peach Twig Borer Development with Degree-Days by Richard E. Rice, Frank G. Zalom, & Jay F. Brunner The development of the peach twig borer Anarsia lineattela Zeller (PTB) can be monitored using pheromone traps and local temperature.

Omnivorous leafroller Omnivorous leafroller (Platynota stultana) is primarily a pest of peaches in the San Joaquin Valley. It occurs in the Sacramento Valley, but seldom causes damage. Omnivorous leafroller overwinters as immature larvae in mummy fruit and does not enter dormancy.

Oriental fruit moth Adult oriental fruit moths (Grapholita molesta) are small grayish moths about 0.4 inch long. These moths normally fly in the evenings just after sunset, or occasionally between daybreak and sunrise. Eggs are disk shaped, white to creamy in color when first laid, and about 0.