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Sudan Gyawaly

Integrated Pest Management Advisor
Cooperative Extension Butte County
5 County Center Drive
Oroville, CA 95965
(530) 552-5812
sgyawaly@ucanr.edu Create VCard

Also in:
Glenn County
Sutter-Yuba Counties
Colusa County
Tehama County


Sudan Gyawaly is an area integrated pest management (IPM) advisor and applied entomologist with several years of experience in agricultural pest management. Sudan joined UCCE as an Associate Specialist in June 2020 and as an IPM advisor in 2022. Prior to joining UCCE, Sudan has worked as a post-doctoral research associate at North Carolina Agricultural and Technical State University, Greensboro, NC. As a post-doctoral research associate, his research was focused on developing pest management practices for pests of fruits and vegetables in organic systems.

Sudan received his MS degree in entomology from West Virginia University, Morgantown, WV and PhD degree from Virginia Tech, Blacksburg, VA. His graduate studies involved research on developing mass rearing techniques for insects including insect natural enemy and developing pest management techniques for white grubs, the larvae of scarab beetles, in turfgrass systems. Sudan enjoys working with growers and all his work, as a graduate student and as a post-doctoral researcher, has involved working closely with growers.


Ph.D. Entomology, Virginia Tech. 2016
M.S. Entomology, West Virginia University. 2011



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


Peer Reviewed

  • Gyawaly, S., and J. P. Rijal. 2022. Neem-based insecticides deter oviposition activity in spotted wing drosophila (Diptera: Drosophilidae) in sweet cherries. Journal of Economic Entomology. 115: 1310–1313.

  • Gyawaly, S., J. P. Rijal, and S. V. Joseph. 2021. Bagrada hilaris (painted bug) https://www.cabi.org/isc/datasheet/8302. In CABI invasive species compendium. CAB International.

  • Rijal, J. P., A. Joyce, and S. Gyawaly. 2021. Biology, ecology, and management of hemipteran pests in almonds orchard Systems in the United States. Journal of Integrated Pest Management. 12: 24.

  • Vorsah, R. V., B. N. Dingha, S. Gyawaly, S. A. Fremah, H. Sharma, A. Bhowmik, M. Worku, and L. E. Jackai. 2020. Organic mulch increases herbivory by the flea beetle species, Disonycha glabrata, on Amaranthus. Insects. 11: 3.

  • Ewunkem, A. J., H. O. Sintim, B. N. Dingha, S. Gyawaly, and L. E. Jackai. 2020. Nutritional ecology of the Southern Green Stink Bug Nezara viridula (Hemiptera: Pentatomidae) on selected varieties of cowpea and tomato. American Journal of Entomology 4: 1-9.

  • Rijal, J. P., C. Burks, and S. Gyawaly. 2020. Exploring navel orangeworm monitoring tools for almond orchards under mating disruption. CAPCA Adviser Magazine (December issue). 4pp.

  • Rijal, J. P., R. Regmi, R. Ghimire, K. D. Puri, S. Gyawaly, and S. Poudel. 2018. Farmers’ knowledge on pesticide safety and pest management practices: A case study of vegetable growers in Chitwan, Nepal. Agriculture 8: 16.

  • Rijal, J., and S. Gyawaly. 2018. Characterizing brown marmorated stink bug injury in Almond, a new host crop in California. Insects 9: 126.

  • Youngman, R. R., T. Kuhar, S. Gyawaly, C. Laub, S. Wu. 2017. Turfgrass insect management.  Virginia Turfgrass Certification Manual 2017. Virginia Cooperative Extension Publication. 

  • Laub, C., S. Gyawaly, and T. Kuhar. 2016. Virginia turfgrass insect management survey. Virginia Cooperative Extension Publication. ENTO-219NP.

  • Gyawaly, S., A. M. Koppenhöfer, S. Wu and T. P. Kuhar. 2016. Biology, ecology, and management of masked chafer grubs in turfgrass. Journal of Integrated Pest Management 7: 1–11.

  • Gyawaly, S., R. R. Youngman, C. A. Laub, and T. P. Kuhar. 2014. Evaluation of insecticide application timings against white grubs in cool season turfgrass in Virginia, 2013. Arthropod Management Tests. 39: G10.

  • Gyawaly, S., and Y. L. Park. 2013. Feeding potential and prey acceptance of Podisus maculiventris (Hemiptera: Pentatomidae): implications for biological pest control. Journal of Plant Biology and Soil Health 2: 1–5.

  • Gyawaly, S., C. Laub, and R. R. Youngman. 2012. Sugarcane beetle in corn. Va. Coop. Ext. pub. ENTO-13NP

Non-Peer Reviewed

  • Niederholzer, F., and S. Gyawaly. 2023. Disease Management in Tight Budget Year. 2023 PreBloom Sac Valley Almond Newsletter. 2pp.

  • Gyawaly, S. and J. P. Rijal. 2023. Brown marmorated stink bug research update in California almond orchards. CAPCA, The Adviser. December issue. 

  • Lara, R. J. Rijal, C. Kron, S. Gyawaly, V. Maiquez, D. Roberts, C. Vue, M. S. Hoddle. 2023. Implementing biological control for invasive brown marmorated stink bug in California. CAPCA, The Adviser December issue. 

  • Gyawaly, S. 2023. Integrated Pest Management Updates. Butte County Farm Bureau Newsletter. July/August issue.

  • Rijal, J.P., and S. Gyawaly. 2023. Navel Orangeworm (NOW) Hull Split Spray Considerations 2023. The Scoop of the Fruit and Nuts. Summer Issue.

  • Gyawaly, S. and F. Niederholzer. 2023. Navel Orangeworm Biofix in a Wet Spring. Sacramento Valley Almond News. Spring issue.

  • Gyawaly, S. 2023. Navel Orangeworm Hullsplit Spray Considerations in 2023. Progressive Crop Consultant. September/October issue.

  • Rijal, J. P., and S. Gyawaly. 2022. Newer Insecticides Critical for Spotted Wing Drosophila (SWD) Resistance Management. Field Notes Newsletter, San Joaquin County. (August 2022)

  • Gyawaly, S. and J. P. Rijal. 2023. Prioritizing Sprays When You Can't Afford Them All. Sacramento Valley Walnut News. April Issue.

  • Niederholzer, F., and S. Gyawaly. 2023. Reality Check. Sacramento Valley Almond News.

  • Gyawaly, S. 2023. Walnut Orchard Tasks – Insect Pest Management. Pacific Nut Producer Magazine June issue.

  • Gyawaly, S., and L. Milliron. 2022. 2022 almond season IPM reflections. Sacramento valley almond news - (Fall, 2022 issue).

  • Rijal, J. P., and S. Gyawaly. 2022. Insecticide options for navel orangeworm IPM in Almonds—A recent trial summary. San Joaquin Valley Tree and Vines (July issue). 3pp

  • Gyawaly, S., and J. P. Rijal. 2022. In-season-& post-harvest management of navel orangeworm (NOW) in walnuts. Sacramento Valley Orchard Source (September issue).

  • J. P. Rijal, and S. Gyawaly. 2021. Fall walnut IPM – Looking back and looking forward. Sacramento Valley Orchard Source (October issue).

  • Gyawaly, S., and J. P. Rijal. 2021. Neem insecticides as oviposition deterrents against spotted wing drosophila in cherries. CAPCA Adviser Magazine. 4pp.

  • Rijal, J. P., and S. Gyawaly. 2021. Insecticide options for navel orangeworm IPM in almonds—a recent trial summary. The Scoop (October issue). 3pp.

  • Rijal, J. P., and S. Gyawaly. 2021. Spring season pest monitoring activities in almond orchards. West Coast Nuts (February issue). 4pp.

  • Gyawaly, S., C. A. Laub, and T. P. Kuhar. 2016. Effects of common turfgrass insecticides on the earthworms. Virginia Turfgrass Journal. 3 pp.

  • Gyawaly, S., C. A. Laub, and T. P. Kuhar. 2015. Can combinations of insecticides and entomopathogenic fungi do the job on hard-to-kill large white grubs? Virginia Turfgrass Journal. 3 pp.

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