Abstract:
The control of filbert (Corylus Avellana L.) suckers by means
of herbicides was investigated in three phases during 1968 and 1969.
(1) Screening trials, on canned filbert trees in the greenhouse, to
determine the effectiveness of various herbicides and concentrations
in controlling vegetative growth. (2) A summary experiment in the
greenhouse to quantitatively evaluate the effectiveness of the three
most promising herbicides selected from the screening trials. (3)
Field trials to determine the effectiveness of the three herbicides at
various concentrations under field conditions in a mature filbert
orchard.
One quart of 2, 4-D, one quart of paraquat, or three pints of
dinoseb per 100 gallons of solution gave satisfactory control of filbert
suckers. Paraquat and 2, 4-D controlled the appearance of regrowth
to a greater extent than dinoseb. Use of oil with dinoseb enhanced the
effect of the herbicide.
Filbert suckers should be treated when less than one foot in
height and thoroughly covered with spray to obtain satisfactory kill.
The herbicide 2, 4-D gave better control of larger suckers than either
paraquat or dinoseb. No evidence of injury to mature filbert trees
was seen where the above rates were used.
