20.0 PART IV.
Mr. RITCHIE said that in the Kilimanjaro region planters have
tried dipping small pieces of Turkey red cloth in a stronger solution
of the poison and placing these inside the bush; by this method
washing off by rain is obviated. In Tanganyika they were also
experimenting with this syrup poison against Dysdercus.
THE StaTUS OF Gonocephalum simplex.
Mr. ANDERSON said that Gonocephalum did the same damage
to coffee trees as cut worms if the trees are stumped back too much;
it completely ring barked them. A bait of 60 lbs. of bran mixed with
1 lb. Paris green, spread round each tree, completely destroyed the
Gonocephalum. 25 lbs. of the mixture, no sweetening agent being
necessary, should be used for one acre of coffee. In Kenya this cut
worm attacked wheat to a considerable extent, but was not found to
a great extent on coffee.
| Roor ExLworm (Heterodera radicicola).
Mr. RITCHIE said that the eelworm did considerable damage
In newly set-out coffee, which had been planted in fields previously
planted with general food crops (i.e., land previously infested). He
understood that this pest was becoming so serious in the Congo that
they were considering the question of budding Coffea Arabica on to
Coffea myrthifolia which was resistant to the pest.
Mr. SMEE stated that Eeelworm was a serious pest on tobacco
in Nyasaland. He had no knowledge of it in regard to coffee.
Mr. WILKINSON stated that it occurred in Kenya but had not
been found to be a pest.
Mr. HARGREAVES had heard of no report in Uganda that this
eelworm was a pest on coffee.
The CHAIRMAN (Mr. Fuller) said that it was a serious pest on
fruit trees in the Cape Province. No soil treatment appeared to be
of any use; he could only suggest that, in places where it is a pest, a
suitable rotation of crops should be tried or that grass should be
planted to clear the land first.
Corre LEA¥ Disease (Hemileia vastatriz).
Mr. RITCHIE said that Kent's and Jackson’s types had been
imported into Tanganyika for trial as to their relative resistance to
Hemileia. In Mysore, where these types were selected, Kent's would
appear to have been more resistant to Hemileia than local types there,
but Jackson’s less so. In Tanganyika, Kent's was proving a robust
grower, with plenty of leaf, and, while not immune to Hemileia, was
considerably resistant; their Jackson’s was too young to form an
opinion, and he had raised this question as he wished to ascertain,
from the experience elsewhere, whether the further importation of
seed of these types should be recommended.
Mr. McDONALD stated that there were no Kent’s or Jackson's
in bearing in those parts of Kenya where leaf disease is prevalent.
He had been informed that some young trees of these types had been
found to be more resistant to leal disease, but no conclusion was
justified from experience in Kenya so far.

OC