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Dr Jhoana Opena
Dr

Jhoana Opena

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Overview

Background

Dr. Jhoana Opena, a seasoned researcher, joined the School of Agriculture and Food Sustainability as a Postdoctoral Research Fellow in 2021. Dr. Opena has over 18 years of experience in research related to Integrated Pest Management (IPM) in vegetables and weed management within rice-based cropping systems across Australia, the Philippines, Cambodia, and Lao PDR. Previously, she worked as an Associate Scientist in the Weed Science group at the International Rice Research Institute and was appointed as an Adjunct Associate Professor at the University of the Philippines in Los Baños. She successfully completed her Doctor of Philosophy in Agriculture at Charles Sturt University in Wagga Wagga, Australia, in 2021. Currently, she is working on an ACIAR project entitled “Weed Management Techniques for Mechanized and Broadcast Lowland Crop Production Systems in Cambodia and Lao PDR.”

Availability

Dr Jhoana Opena is:
Available for supervision

Qualifications

  • Bachelor, University of the Philippines Los Baños
  • Masters (Coursework), University of the Philippines
  • Doctor of Philosophy, Charles Sturt University

Research interests

  • Weed management in rice and rice-based cropping systems

  • Weed ecology

  • Integrated weed management in direct seeded rice systems

  • Weed population dynamics

  • Allelopathy and its application for weed management

Works

Search Professor Jhoana Opena’s works on UQ eSpace

23 works between 2012 and 2024

1 - 20 of 23 works

2024

Other Outputs

Mutual benefits of partnerships between SE Asia and Australia for sustainable weed management

Lemerle, Deirdre, Mitchell, Jaquie, Molesworth, Anika, Opena, Jhoana, Palaniappan, Gomathy, Reade, Cathy and Wunderlich, Nicola (2024). Mutual benefits of partnerships between SE Asia and Australia for sustainable weed management.

Mutual benefits of partnerships between SE Asia and Australia for sustainable weed management

2023

Conference Publication

Herbicides in lowland rice farming: What's driving the farmer's choice in Lao PDR?

Bouahom, Bounthanom, Palaniappan, Gomathy, Opena, Jhoana and Mitchell, Jaquie (2023). Herbicides in lowland rice farming: What's driving the farmer's choice in Lao PDR?. 28th Asian Pacific Weed Science Society Conference (APWSS 2023), Phuket, Thailand, 26-29 November 2023. Weed Science Solutions for Global Food Security:

Herbicides in lowland rice farming: What's driving the farmer's choice in Lao PDR?

2023

Conference Publication

Empowering rice farmers in Laos through gender-inclusive integrated weed management training

Bounthanom, Bouahom, Gomathy, Palaniappan, Jhoana, Opena and Jaquie, Mitchell (2023). Empowering rice farmers in Laos through gender-inclusive integrated weed management training. International Rice Congress 2023, Manila, Philippines, 16-19 October 2023. doi: 10.5281/zenodo.10398315

Empowering rice farmers in Laos through gender-inclusive integrated weed management training

2023

Conference Publication

Unlocking women's potential for effective weed management in rainfed lowlands: A Cambodian perspective

Lim, Sophornthida, Chea, Sareth, Palaniappan, Gomathy, Opena, Jhoana and Mitchell, Jaquie (2023). Unlocking women's potential for effective weed management in rainfed lowlands: A Cambodian perspective. International Rice Congress 2023, Manila, Philippines, 16-19 October 2023. Zenodo. doi: 10.5281/zenodo.10398235

Unlocking women's potential for effective weed management in rainfed lowlands: A Cambodian perspective

2023

Conference Publication

Promoting gender equality amongst rice farmers: Insights from ACIAR funded projects in Laos, Cambodia, and Vietnam

Palaniappan, Gomathy, Chea, Sareth, Lim, Sophornthida, Bouahom, Bounthanom, Nguyen, Minh Anh, Nguyen, Binh Thanh, Nguyen, Tin Hong, Opena, Jhoana and Mitchell, Jaquie (2023). Promoting gender equality amongst rice farmers: Insights from ACIAR funded projects in Laos, Cambodia, and Vietnam. International Rice Congress 2023, Manila, Philippines, 16-19 October 2023. Zenodo. doi: 10.5281/zenodo.10398686

Promoting gender equality amongst rice farmers: Insights from ACIAR funded projects in Laos, Cambodia, and Vietnam

2023

Conference Publication

Designing best weed management practices for mechanized rainfed and irrigated direct seeded rice systems in Cambodia and Lao PDR

Opena, Jhoana and Mitchell, Jaquie (2023). Designing best weed management practices for mechanized rainfed and irrigated direct seeded rice systems in Cambodia and Lao PDR. International Rice Congress 2023, Manila, Philippines, 16 - 19 October 2023. Zenodo. doi: 10.5281/zenodo.10398266

Designing best weed management practices for mechanized rainfed and irrigated direct seeded rice systems in Cambodia and Lao PDR

2021

Journal Article

Potential of winter pasture legume in rice rotations to mitigate barnyard grass (Echinocloa crus-galli) impacts in temperate Australia

Opena, Jhoana, Pratley, James, Lemerle, Deirdre, Wu, Hanwen and McCormick, Jeffrey (2021). Potential of winter pasture legume in rice rotations to mitigate barnyard grass (Echinocloa crus-galli) impacts in temperate Australia. Agricultural Science, 79-91.

Potential of winter pasture legume in rice rotations to mitigate barnyard grass (Echinocloa crus-galli) impacts in temperate Australia

2021

Other Outputs

Impacts of pasture legume phase on the seed bank, establishment and growth of barnyard grass (Echinochloa crus-galli) in drill sown rice

Opena, Jhoana (2021). Impacts of pasture legume phase on the seed bank, establishment and growth of barnyard grass (Echinochloa crus-galli) in drill sown rice. PhD Thesis, School of Agricutural, Environmental and Veterinary Sciences, Charles Sturt University.

Impacts of pasture legume phase on the seed bank, establishment and growth of barnyard grass (Echinochloa crus-galli) in drill sown rice

2019

Conference Publication

Pasture legumes offer promise to control barnyard grass in delayed permanent water systems in rice

Opena, Jhoana, Pratley, James, McCormick, Jeffrey, Wu, Hanwen and Lemerle, Deirdre (2019). Pasture legumes offer promise to control barnyard grass in delayed permanent water systems in rice. 2019 Agronomy Australia Conference, Wagga Wagga, NSW, Australia, 25 – 29 August 2019.

Pasture legumes offer promise to control barnyard grass in delayed permanent water systems in rice

2018

Conference Publication

Allelopathic potential of pasture legume species and selected winter crops on barnyard grass and rice

Opena, Jhoana, Wu, Hanwen, Moroni, Sergio, Lemerle, Deirdre and Pratley, James (2018). Allelopathic potential of pasture legume species and selected winter crops on barnyard grass and rice. 21st Australasian Weeds Conference, Manly, Australia, 2-12 September 2018. The Weed Society of New South Wales Inc..

Allelopathic potential of pasture legume species and selected winter crops on barnyard grass and rice

2017

Book Chapter

Rice weed management in Southeast Asia

Kumar, Virender, Opena, Jhoana, Valencia, Katherine, Thi, Ho Le, Nguyen, Hong Son, Donayre, Dindo King, Janiya, Joel and Johnson, David E. (2017). Rice weed management in Southeast Asia. Weed Management in Rice in the Asian Pacific Region. (pp. 282-307) Hyderabad, India: Asian-Pacific Weed Science Society.

Rice weed management in Southeast Asia

2015

Conference Publication

Persistence of oxadiazon residues in soil and grains in an upland rice (Oryza sativa) field

Bunquin, Michelle Anne, Onoya, Jerone, Chauhan, Bhagirath, Opena, Jhoana and Beebout, Sarah (2015). Persistence of oxadiazon residues in soil and grains in an upland rice (Oryza sativa) field. Unknown, Unknown, Unknown. Washington, DC United States: American Chemical Society.

Persistence of oxadiazon residues in soil and grains in an upland rice (Oryza sativa) field

2015

Journal Article

Seed Germination Ecology of Doveweed (Murdannia nudiflora) and Its Implication for Management in Dry-Seeded Rice

Ahmed, Sharif, Opena, Jhoana L and Chauhan, Bhagirath S (2015). Seed Germination Ecology of Doveweed (Murdannia nudiflora) and Its Implication for Management in Dry-Seeded Rice. Weed Science, 63 (2), 491-501. doi: 10.1614/WS-D-14-00115.1

Seed Germination Ecology of Doveweed (Murdannia nudiflora) and Its Implication for Management in Dry-Seeded Rice

2015

Journal Article

Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems

Chauhan, Bhagirath Singh, Opena, Jhoana and Ali, Jauhar (2015). Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems. Plant Production Science, 18 (2), 228-233. doi: 10.1626/pps.18.228

Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems

2014

Journal Article

Weed population dynamics, herbicide efficacies, and crop performance in a sprinkler-irrigated maize-rice cropping system

Opena, Jhoana L., Quilty, James R., Correa, Teodoro Q. and Chauhan, Bhagirath S. (2014). Weed population dynamics, herbicide efficacies, and crop performance in a sprinkler-irrigated maize-rice cropping system. Field Crops Research, 167, 119-130. doi: 10.1016/j.fcr.2014.07.014

Weed population dynamics, herbicide efficacies, and crop performance in a sprinkler-irrigated maize-rice cropping system

2014

Journal Article

Seed germination ecology of echinochloa glabrescens and its implication for management in rice (Oryza sativa L.)

Opena, Jhoana L, Chauhan, Bhagirath S. and Baltazar, Aurora M. (2014). Seed germination ecology of echinochloa glabrescens and its implication for management in rice (Oryza sativa L.). PLoS ONE, 9 (3) e92261, e92261.1-e92261.9. doi: 10.1371/journal.pone.0092261

Seed germination ecology of echinochloa glabrescens and its implication for management in rice (Oryza sativa L.)

2013

Journal Article

Weed management and grain yield of rice sown at low seeding rates in mechanized dry-seeded systems

Chauhan, B. S. and Opena, J. (2013). Weed management and grain yield of rice sown at low seeding rates in mechanized dry-seeded systems. Field Crops Research, 141, 9-15. doi: 10.1016/j.fcr.2012.11.002

Weed management and grain yield of rice sown at low seeding rates in mechanized dry-seeded systems

2013

Journal Article

Implications of plant geometry and weed control options in designing a low-seeding seed-drill for dry-seeded rice systems

Chauhan, B. S. and Opena, J. (2013). Implications of plant geometry and weed control options in designing a low-seeding seed-drill for dry-seeded rice systems. Field Crops Research, 144, 225-231. doi: 10.1016/j.fcr.2012.12.014

Implications of plant geometry and weed control options in designing a low-seeding seed-drill for dry-seeded rice systems

2013

Journal Article

Management of volunteer corn seedlings in dry-seeded rice

Chauhan, Bhagirath S. and Opeña, Jhoana L. (2013). Management of volunteer corn seedlings in dry-seeded rice. American Journal of Plant Sciences, 04 (12), 2381-2385. doi: 10.4236/ajps.2013.412294

Management of volunteer corn seedlings in dry-seeded rice

2013

Journal Article

Effect of plant geometry on growth and yield of corn in the rice-corn cropping system

Chauhan, Bhagirath S. and Opeña, Jhoana L. (2013). Effect of plant geometry on growth and yield of corn in the rice-corn cropping system. American Journal of Plant Sciences, 04 (10), 1928-1931. doi: 10.4236/ajps.2013.410237

Effect of plant geometry on growth and yield of corn in the rice-corn cropping system

Supervision

Availability

Dr Jhoana Opena is:
Available for supervision

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Supervision history

Current supervision

Media

Enquiries

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