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Dr. Philip Waisen

Vegetable Crops Advisor
Riverside County
81077 Indio Blvd.
Suite H
INDIO, CA 92201
pwaisen@ucanr.edu Create VCard

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Riverside County, Indio Office



Philip Waisen (Ph.D.)

Dr. Philip Waisen is currently a Vegetable Crops Advisor at the University of California Cooperative Extension (UCCE). He started on January 10, 2022, and works out of the Indio Office in Riverside with responsibilities both in Riverside and Imperial counties. Prior to joining UCCE, Philip was a postdoctoral researcher at the University of Hawaii at Manoa, where he worked on Western SARE-funded research projects on nematode and soil health management in agroecosystems (tomato, peppers, cucurbits, asparagus, banana, brassicas). He also taught a graduate-level Plant Nematology course for a semester while as a postdoctoral researcher. For the whole of 2021, Philip was attached with his undergraduate school, the Papua New Guinea University of Technology as a part-time lecturer teaching Plant Pathology, Research Methods, and Horticultural Sciences courses.

Here at UCCE, Philip is developing Research and Extension Programs focused on Pest and Disease Management, Soil Health and Fertility Management, and Cover Crops and Insectary Plants in Low Desert Vegetable Cropping Systems. 

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Ph.D. (2019) in Plant Pathology/Nematology, Plant and Environmental Protection Sciences, University of Hawaii at Manoa

MSc. (2015) in Plant Pathology/Nematology, Plant and Environmental Protection Sciences, University of Hawaii at Manoa

BSc. (2012) in Agriculture Science, Agriculture Department, The Papua New Guinea University of Technology



Plant Pathology/Nematology/Soil Health



Pest and Disease Management; Nutrient and Soil Health Management in Agroecosystems



Ph.D. Plant Pathology/Nematology, University of Hawaii at Manoa. 2019
MSc. Plant Pathology/Nematology, University of Hawaii at Manoa. 2015
BSc. Agricultural Sciences, Papua New Guinea University of Technology. 2012


Plant Pathology/Nematology Ecology/Soil Health/Cover Crops

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Waisen, P., Cheng, Z., Sipes, B. S., and Wang, K-H. 2022. Biofumigation effects of brassicaceous cover crops on soil health in cucurbit agroecosystems in Hawaii, USA. Pedosphere 32(4):521–531. https://doi.org/10.1016/S1002-0160(21)60054-1

  • Wang, K-H., Waisen, P., Paudel, R., Chen, G., Meyer, S. L. F., Hooks, C. R. R. 2022. Effects of Plasticulture and Conservation Tillage on Nematode Assemblage and Their Relationships with Nitrous Oxide Emission following a Winter Cover Cropping and Vegetable Production System. Horticulturae. 8:728. https://doi.org/10.3390/horticulturae8080728

  • Olmedo-Velarde, A., Loristo, J., Kong, A., Waisen, P., Wang, K. H., Hu, J., and Melzer, M. 2022. Examination of the Virome of Taro Plants Affected by a Lethal Disease, the Alomae-Bobone Virus Complex, in Papua New Guinea. Viruses 14(7):1410. https://doi.org/10.3390/v14071410

  • Waisen, P., and Wang, K.-H. 2022. Perspective Chapter: Capitalizing on the Host Suitability of Brassica Biofumigant Crops to Root-Knot Nematodes (Meloidogyne spp.) in Agroecosystems - A Review on the Factors Affecting Biofumigation. In Kumar, S (Ed.), Brassica - Recent Advances. IntechOpen. https://doi.org/10.5772/intechopen.107314

  • Wang, K.-H., Waisen, P., Leslie, A. W., Paudel, R., Meyer, S. L. F., and Hooks, C. R. R. 2022. Relationships between Soil Tillage Systems, Nematode Communities and Weed Seed Predation. Horticulturae 8(5):425. https://doi.org/10.3390/horticulturae8050425 

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