Weed management assessment for public flower beds©
A lack of participants and techniques for weeding of flowerbeds in public spaces has multiplied the difficulties inherent in local social gardening. This study was conducted to ascertain a weed threshold for management of flowerbeds in public spaces from the relation between flower plant growth and the amount of weeds remaining after weed removal activities. We planted blue salvia seedlings (Salvia farinacea) in a field. Later, at 31 days and 85 days after transplantation of the plants, we measured the blue salvia plant height and plant coverage. Additionally, we measured the dry matter weight of remaining weeds after 20 people had removed weeds from flowerbeds. Results show that remaining weed dry matter weight and rate of remaining weeds at 31 days after transplantation were 1.4 g m-2 and 1.6% when the plant height and plant coverage of blue salvia were 10.4 cm and 8.3%. The same measures at 85 days after transplantation were 10.8 g m-2 and 18.2% when the plant height and plant coverage of blue salvia were 47.9 cm and 56.0%. A significant positive correlation was found between the blue salvia plant coverage and the rate of remaining weeds. Results obtained using linear regression suggest a remaining weed threshold for flowerbed management based on the plant coverage of the flower plants being planted.
Matsushima, K., Hirama, C., Mitarai, Y. and Koike, Y. (2017). Weed management assessment for public flower beds©. Acta Hortic. 1174, 127-132