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122
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Discussioni
In the absence of Dr. Kaiser, Dr. Nene presented the paper.
G.C. Hawtin
It is mentioned in Dr. Kaiser's paper that ascochyta blight was introduced with
the seed into Australia. This country has very starict quarantine laws - are
such regulations of any use?
Y.L. Nene
I suppose mistakes can occur. I am unable to offer any additional information.
M.V. Reddy
The development of resistant cultivars can also be helpful in producing clean
seed. Even though the seed movement may not prevent the entry of disease
into new areas forever, it can considerably delay the movement of new races.
J.B. Smithson
Are ULV formulations of the fungicides available?
S. Hanounik
No ULV formulation of Bravo is available. Most ULV sprays are used with
insecticides. Some work , however, is being done in Syria.
G.C.Hawtin
It is not only water for spraying which is a problem in the use of fungicides.
Perhaps of greater importance is the fact that when sprays are needed in the
winter,.the soil may be too wet to allow access for spraying, particularly with
tractor mounted equipment.
Y.L. Nene
While foliar sprays may have limited use, seed dressing with an appropriate
fungicide should be effective.
J.S. Grewal
The present conventional spray fungicides cannot be used by farmers because
of the cost, time, and number of sprays required to control the disease. I agree
with Dr. Nene that seed treatment with systemic fungicide which can provide
protection to the seedling for some time can be a real answer to the problem.