Abstract:
The oblique-banded leaf roller [Archips rosaceana (Harris)] has become
a major pest of red raspberries in the Willamette Valley. It has a large host
range of cultivated and wild plants. The main concern on raspberries is its
habit of getting into the cups of the fruit. It is only of minor importance in
other varieties of cane berries
Briefly, the life history is as follows : Hibernation takes place as third
instar larvae in small silken cocoons underneath the bark and bud scales. The
larvae emerge throughout March and April. These larvae feed on the leaves,
tips, and blossoms until late spring. During the latter part of May, throughout
June, and early July, the moths emerge The eggs of these moths, laid on the
upper sides of the leaves, hatch during June and July. These larvae mature
during August and September to form another generation of moths. The
larvae from this latter generation of moths develop to the third stage and then
hibernate.
Parasites play an important role in holding this pest in check. To date,
29 parasites have been reared from this pest. Twenty-one of these parasites
may be considered as beneficial and the other eight as harmful because they
are also parasites of beneficial parasites.
Control consists of cutting out and burning old canes between November 1
and March 1 and supplementing this cultural practice by treating infested fields
with DDT dusts or sprays.
