Forest Insect and Disease Survey; Ontario, 1965 - NFIS

A 21
TABLE 17 (continued)
Insect Host Remarks
Monoctenus fulvus (Nort.)
Nematus spp. (see Phyllocolpa spp.)
Neodiprion nanulus nanulus Schedl. rP
Neodiprion pinetum (Nort.)
Phyllocolpa spp.
Phytagromyza populicola (Hal.)
Pikonema alaskensis (Koh.)
Pristiphora geniculata (Htg.) Mo
Profenusa thomsoni (Konow)
ee
wP
Po
1Po
Pseudexentera oregonana Wlshm. to
Schizolachnus piniradiatae (Dav.) rP
Setoptus jonesi (Keifer)
wB
rP
Low populations throughout the
district. The highest population
check was in Garden Twp. where 7
larvae were recovered from 15 tray
samples.
Light infestation on roadside trees
in Chandos Twp,
Small numbers of colonies found in
Somerville, Cavendish, and
Snowdon twps.
Light infestations were common
throughout the Lindsay District in
1965. Populations were lighter than
in 1964. The highest infested leaf
count being 25% of the leaves
infested, in Stanhope Twp.
Heavy infestations on clumps of
Lombardy poplar throughout the
district.
Heavy infestation at one location
in Minden Twp. Light infestations
in small patches in Manvers and
Cartwright twps. Very small numbers
in the rest of the district.
Small patches of heavy infestation
occurred in Hope, Hamilton, and
Haldimand twps. Populations
otherwise declined to a very low
level in 1965.
Heavy infestation on regeneration
white birch in small areas of
Darlington Twp.
Light infestations in small areas
in Chandos and Anstruther twps.
Heavy infestations in plantations
in Asphodel, Guilford, and Methuen
twps. Light in the rest of the
district.
Heavy infestation in 20 acres of
red pine plantation in Stanhope Twp.
Almost all of the current years
foliage on approximately 70 per cent
of the trees in the plantation was
damaged.