2023 APSA Seed Technology Webinar - Session 3 12 September 2023 / 14:00 – 16:00 hrs. (GMT+7)

Hosted by APSA Standing Committee on Seed Technology, the webinar series on Seed Technology is organized exclusively for APSA members only. This year is the third year APSA will be holding this webinar series, and will focus on such topics as Seed Priming, Seed Drying, Seed Disinfection, Seed Quality & Seed Vigor.

2023 APSA Seed Technology Webinar - Session 3
12 September 2023 / 2:00 pm - 4:00 pm (GMT+7)

Seed Disinfection

14:00 - 14:10

Opening of the Webinar
Prof. Dr. Uma Rani Sinniah, Member, APSA Standing Committee on Seed Technology  

Moderator: Dr Sandeep Jadli, Chair, APSA Standing Committee on Seed Technology  

14:10 - 14:40

Fundamental seed disinfection
Dr M. Krishna Reddy
, Ex-Professor and Head from IIHR, specialization in plant pathology and seed pathology

14:40 - 15:00

Q&A Session

15:00 - 15:30

Practical solutions for seed disinfection

  • Dr Doreen Thoren, Manager Innovative Seed Technology Service, SaatGut Services GmbH 
  • Dr Marcel Wolbrink, Managing Director, PETKUS Selecta B.V.
15:30 - 15:50

Q&A Session

15:50 - 16:00

Wrap up and closing remarks
Member, APSA Standing Committee on Seed Technology  


Dr. M. Krishna Reddy
Principal Scientist & Head, Division of Crop Protection, ICAR-Indian Institute of Horticultural Research, Bengaluru, India.
2021 APSA Most Influential Plant Pathologist in the Asia-Pacific and received several national and international awards.

As a distinguished plant pathologist with a distinguished career of 30 years, Dr. Reddy’s expertise is in surveying and monitoring of plant pathogens, diagnosis and identification of emerging plant pathogens, development of ecologically, sustainable IPM strategies, identification of sources of resistance to major plant viruses and development virus resistant hybrids/varieties in vegetables.

Published in some 172 papers in  journals and presented research papers at 21 international conferences, he has a strong reputation in plant virology circles, both in India and internationally, specifically for his contributions in monitoring and studying emerging plant pathogens, including CaCV, CABYV, CMV, OELCV, PMMV, TSV, ToMMV, TSWV, WBNV and currently, ToBFRV.

Furthermore, he was recognized for the development of diagnostics and diagnostic services, extending to ELISA, DIBA and TIPA immunodiagnostics, NASH, PCR, RT-PCR, LAMP, NGS based molecular diagnostics for detection and identification of viroids, viruses, bacteria and phytoplasma infecting horticultural crops of fruits, vegetable and ornamental crops. In the domain of international trade and quarantine, Dr Reddy is a designated authority to issue phytosanitary certificates for tissue culture plants and seeds to facilitate the export of 21 ornamental crops, four fruit crops and 31 vegetable crop seeds.

He has provided diagnostic services and phytosanitary certificates for 53 seed companies, six organizations and three institutions and provided pathogen testing and certification for planting material, to issue phytosanitary certificates to seven nursery units and 17 Tissue culture Industries. He has mentored one PDF, 9 PhD and 6 MSc students, in addition to several scientific personal and also a recognized faculty of 9 Universities

Dr Doreen Thoren
Manager Innovative Seed Technology Service
SaatGut Services GmbH 

Dr. Doreen Thoren made her PhD. in Agronomy and works in the PETKUS Group since 2011. She is responsible for both seed treatment and cleaning projects within the PETKUS group. She set up the PETKUS seed laboratory and test center to test customer's seeds on various PETKUS machines. Futhermore she supports the development of new machines. Her focus is the development of an alternative seed treatment method without the use of chemicals. Steam treatment turned out to be a very effective means of seed disinfection. Based on that insight she developed the seed treatment system HySeed bio. PETKUS was able to successfully establish and sell HySeed bio on the market, e.g. for the disinfection of sugar beet seeds. In addition to steam treatment coating, encrusting, and pelleting can be performed with the HySeed bio system.

Dr Marcel Wolbrink
Managing Director
PETKUS Selecta B.V.

Marcel Wolbrink is an expert in seed processing with a master degree in Agricultural Economics, working in the seed business for over 25 years. His journey began as a researcher at Wageningen University, where he laid the foundation for his passion for seed.

During a significant part of his career, Marcel was working as Supply Chain Manager, taking charge of seed processing operations. This role allowed him to expand his knowledge on seed sorting and seed treatment solutions.

Today, Marcel Wolbrink serves as the Managing Director of PETKUS Selecta, a renowned leader in manufacturing seed cleaning and processing equipment, particularly specializing in high-quality fine seeds. As being part of the PETKUS Group, PETKUS Selecta offers complete solutions on sorting and treatment for the vegetable- and flower seed industry worldwide, including the R&D departments in the field crop sector. Their commitment to excellence is evident in the design and production of their machines, adhering to the highest quality standards in the industry.




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