Page Banner

United States Department of Agriculture

Agricultural Research Service

Judy A. Johnson

Research Entomologist

Contact Information: 

Commodity Protection and Quality

San Joaquin Valley Agricultural Sciences Center

9611 S. Riverbend Ave.

Parlier, CA   93648

(559) 596-2768 (voice)


Much of the U.S.production of dried fruits and tree nuts occurs in the central valley of California.  To provide consumers with quality product, processors must control postharvest insect pests.   My current research involves the development of non-chemical treatments to solve this issue.   I am concerned primarily with physical treatments using temperature extremes or vacuum, but I am also interested in insect parasitoids as control agents.   The target pests for most of this work include both field pests of postharvest significance and stored product pests.


Recent Publications


Jiao, S., Johnson, J.A., Tang, J., Mattinson, D.S., Fellman, J.K., Davenport, T.L., Wang, S. 2013. Tolerance of codling moth, and apple quality associated with low pressure/low temperature treatments. 


Wang, Y., Zhang, L., Johnson, J., Gao, M., Tang, J., Powers, J.R., Wang, S. 2013. Developing hot air-assisted radio frequency drying for in-shell macadamia nuts.


Johnson, J. A., Walse, S. S., Gerik, J. S. 2012. Status of alternatives for methyl bromide in the United States.


Jiao, S., Johnson, J. A., Fellman, J. K., Mattinson, D. S., Tang, J., Davenport, T. L., and Wang, S.  2012. Evaluating the storage environment in hypobaric chambers used for disinfesting fresh fruits.


Jiao, S., Johnson, J. A., Tang, J.,and Wang. S.  2012.  Industrial-scale radio frequency treatments for insect control in lentils.



Current Research

Radio Frequency


Low Temperature



Outreach Activities



Stored Product Insect Identification


Last Modified: 12/11/2014
Footer Content Back to Top of Page