Folia Horticulturae

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The response of black currant and weeds to glyphosate

Jerzy Lisek

Research Institute of Pomology and Floriculture
Pomologiczna 18, 96-100 Skierniewice, Poland

In 2001-2003, two formulations of glyphosate containing isopropylamine salt used at the rate of 1.08 and 2.16 kg a. i. ha-1, and ammonium salt at 1.02 and 2.04 kg a. i. ha-1, were assessed with respect to their effectiveness in controlling weeds on black currant plantations in Skierniewice (central Poland), during the dormant period of the bushes. Application of the herbicide in November was completely safe for the shrubs, which did not show any symptoms of damage after the start of vegetation. Glyphosate applied in March caused damage to developing shoots and leaves, but did not reduce fruit yields produced by the black currant bushes. Glyphosate effectively controlled winter hardy weeds, both annual and perennial, eliminating them or reducing their number from March until the first days of May when, no longer controlled by glyphosate, annual weeds began to sprout en masse and perennial weeds developed again.

Lisek J., 2005. The response of black currant and weeds to glyphosate. Folia Horticulturae 17/2: 71-79.