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collecting weed seeds

A New Soil Sampler and Elutriator for Collecting and Extracting Weed Seeds from Soil

A soil sampler, elutriator, and associated sample flushing device were designed and constructed for an intensive study of weed seedbanks. This equipment was used in 1993 to collect and process 4980 soil samples. The sampler was durable, core size was consistent, and sampling was efficient. Cores were approximately 200 cm 3 and two people could take 120 cores/h. The elutriator separated weed seeds from 36 of these cores at a time. Washing required 60 to 75 min depending on soil texture. Seeds as small as 0.3 mm in diam were recovered and almost 100% of the seeds were recovered from samples spiked with barnyardgrass, redroot pigweed, velvetleaf, and witchgrass. The flushing device was used to transfer sample contents from strainers of the elutriator to propyltex bags for drying and storing. Equipment like this, plus improved technology for identifying and counting seeds, is needed to make weed seedbank studies more feasible.

Webinar on “Harvesting of Weed Seeds: A novel preventive way of weed management” organized

The ICAR-Directorate of Weed Research, Jabalpur, Madhya Pradesh in collaboration with the Indian Society of Weed Science organized a Webinar on “Harvesting of Weed Seeds: A novel preventive way of weed management” today.

In his address, Dr. J.S. Mishra, Director, ICAR-DWR, Jabalpur emphasized on the need of managing the weed seeds through Harvest Weed Seed Control (HWSC) Technology. He outlined the usefulness of the technology for organic farming to reduce the weed seed bank in the soil to manage the weeds effectively.

Dr. B. Shridar, Dean (Agricultural Engineering), AEC&RI, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu regarded the accumulation of weed seeds in soil as the main cause of weed infestation in the future crops. He stressed on harvesting weed seeds at the time of harvesting of crop as one of the best preventive management strategies.

The Lead Speaker, Dr. Michael Walsh delivered the Talk covering the different aspects of research and development of HWSC Systems. His efforts in the area of HWSC have led to the introduction and wide adoption of the technology in Australia. The weed seed density was recorded very less after applying of HWSC Systems in comparison to control.

More than 180 participants including Scientists and Students from the various ICAR Institutes and State Agricultural Universities attended the Webinar.

(Source: ICAR-Directorate of Weed Research, Jabalpur, Madhya Pradesh)

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After 13 years of travel and more than 120 awards won in the national and international cannabic scene, at Delicious Seeds we have decided to celebrate it with 4 very special collections for us.

Each of the varieties that make up the collections has given us many joys at one point or another in our history. Some are great champions and others are best sellers, but all of them have contributed to the fact that after 13 years we continue to work with the same enthusiasm as at the beginning.

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