NSP - Eleocharis kuroguwai
 

ELEOCHARIS KUROGUWAI Ohwi

 

 

Family: Cyperaceae

An erect, tuber-forming perennial. Plant height, number of tillers and top fresh weight per m2 are 50-90 cm, 500-875 and 175-750 g, respectively. It flowers from August when it is planted in May at Suwon, Korea. The maximum percent sprouting of E. kuroguwai is less than 60% until 50 days after incubation. This means the tuber of E. kuroguwai has dormancy. This weed forms tubers deep in the soil . These propagules die when the temperature falls below -5 to -7 °C and cannot survive under dry conditions. Vegetative propagules with a water content of about 70% die when their water content decreases to 30%. For sprouting of this weed, the minimum temperature is about 10 °C, the optimum temperature is 30-35 °C and the maximum temperature is 40-45 °C, respectively; the tuber can sprout even under upland soil moisture conditions.

This weed propagates only by vegetative propagules. It bears several lateral buds in addition to one apical bud. This apical bud is dominant over lateral buds, but if removed, the remaining lateral buds readily sprout.

It is mainly found in temperate countries, such as China, Korea and Japan in irrigated rice areas.

E. kuroguwai is not easy to be controlled by the use of herbicides. Its infestation can be reduced with land preparation and dragging its vegetative organs to the soil surface for further dessication.

 

Countries: Korea (South)

 

Back to Database of Weed Species in Crops and Countries

 

Core Themes