M"y, L974 - MSpace at the University of Manitoba

Ëhe stems, pods and seeds and to a lesser extent the folíage. sJ¡mptoms
range from small bror¿n circular lesions on the cotyledons to cankers with
concentric rings on the stemso to large black lesions on the pods with
the seeds beneath displaying various types of lesions " Änthracnose ca'
attack a1-1 agricultural species and is reported to be a serious problem
of L" angustdfolius Ln the U.S.A., however genes for resistance have been
isolated from some wild types (I,Ieímer, Lg43" L952a; Forbes and I,Iellso
1961) .
FUSARTITM RooT Ror AND I,trLT (Fusaríwn spp.) can be d.esËrucríve ín
rdarm, moíst weather" Transmission may be by seed but more commonly via
the soil since many other crops are susceptible to this pathogen. csuti
(L962) found Èhat three species of Fusarium could be distinguished ín
the r¿ilt dísease of lupins, namely, .p" oæasporLÍtr, F. ansena,ce?Ìns and F.
t'edolens' plus oËhers that were not identified. He suggests that E.
oæasporwn is usually the first invader followed by the other species.
tr'Ieimer (1941) reported that this disease is mainly a problem on L. Luteus.
However Armstrong and Armstrong (1964) found various races of F. oæAsporwn
that could arrack ¿. albus and L. angustifolius.
The pathogen, whether seed or soil borne, attacks the underground
portion of the plant whích prod.uces the characteristic wilt sympËoms of
the above ground portions. These include dwarfing, yellowíng, wilting
and evenËual death. The symptoms on the root sysÈen includ.e a dry roË,
with lesions that range from water-soaked to a mahogany red to dark brown,
dependíng on the stage of development, tissue moisture conËerit and which
partieular species of Fusari-um is parasitizing the plant (lrreirner , Lgs1b) .
ResisËant rines of L" Luteus have been isorated (Larnberts, r955a;
Tro11, L964). Crop rotatíon is an important conLrol measure because of
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