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Pathology
of Legumes. Eds. J. B i r d and K. Maramoros
c h . New Y o r k : Academic P r e s s .
151-155. 1097
The g r a i n legumes program i n t h e E a s t e r n
Caribbean focusses on pigeonpea b r e e d i n g
and s e l e c t i o n , p h y s i o l o g y , b i o c h e m i s t r y ,
m i c r o b i o l o g y , crop p r o t e c t i o n , agronomy and
m e c h a n i z a t i o n , f o o d - t e c h n o l o g y , economics
and d i s e a s e s . The c h a p t e r on pigeonpea
p o i n t s o u t t h e need f o r a survey of p i g e o n ­
pea diseases and f o r assessment of p o t e n ­
t i a l danger from diseases c u r r e n t l y o f
minor importance and more i n t e n s i v e s t u d y
of diseases t h a t have a l r e a d y been shown
to be of i m p o r t a n c e .
SREENIVASAYA, M. 1932.
Present p o s i t i o n o f t h e problem o f s p i k e
d i s e a s e . Cajanus indicus. C u r r . S c i .
1 ( 5 ) : 1 2 6 . 1098
The s i m p l e s t and t h e r e a d i e s t way of d i a g ­
n o s i n g s p i k e i s t h r o u g h t h e e x t e r n a l symptoms
. C o m m u n i c a b i l i t y of t h e symptom from
one p l a n t t o a n o t h e r i s t h e c r i t e r i o n o n
which i n f e c t i o u s n a t u r e o f s p i k e d i s e a s e
has been f i r m l y e s t a b l i s h e d . in t h e regen
e r a t i o n p l o t s , the s a n d a l p l a n t s a s s o c i a -
t e d w i t h leguminous h o s t s (Cajanus indicus),
w h i c h f a v o r a r a p i d growth o f t h e p a r a s i t e ,
have succumbed to t h e d i s e a s e .
SRIKANTHA MURTHY, G. 1975.
S t u d i e s o n t h e n a t u r e o f p e r s i s t e n c e i n
Cajanus c a j a n ( L . ) M i l l s p . a g a i n s t w i l t
caused by Fuearium udum B u t l . Mysore J.
A g r i c . S c i . 9(4) :716-717. 1099
A n a l y s i s o f two v a r i e t i e s i n d i c a t e s t h a t
r e s i s t a n c e was a s s o c i a t e d w i t h a h i g h e r
c o n t e n t o f t o t a l s u g a r , r e d u c i n g s u g a r s ,
amino n i t r o g e n , amino a c i d s , p h e n o l s ,
f l a v a n o l s , and a l k a l o i d s . The r e s i s t a n t
v a r i e t y a l s o c o n t a i n e d h i g h e r amounts o f
x y l o s e , c y s t e i n e , and t r y p t o p h a n , and lower
amounts of p h e n y l a l a n i n e . Bioassay revealed
t h a t c a f f e i c and c h l o r o g e n i c a c i d s and an
u n i d e n t i f i e d p h e n o l i c compound, which were
p r e s e n t i n t h e r e s i s t a n t v a r i e t y , i n h i b i t e d
spore g e r m i n a t i o n . I t i s c o n s i d e r e d t h a t
c y s t e i n e c o u n t e r a c t s f u n g a l i n f e c t i o n b y
c h e l a t i n g f e r r i c i o n s w h i c h a c t i v a t e t h e
Fuearium t o x i n .
SU, U THET. 1 9 3 1 .
P l a n t diseases i n Burma. I n t e r n . B u l l .
P l a n t P r o t . Year V: 141-142. 1100
SUBRAMANIAN, C.V. 1955.
S t u d i e s on South I n d i a n F u s a r i a . The
' W i l d t y p e ' in Fusarium udum B u t l .
J . I n d i a n B o t . Soc. 3 4 ( 1 ) : 2 9 - 5 6 . 1101
M o r p h o l o g i c a l c h a r a c t e r s o f c o n i d i a u s e f u l
i n d i a g n o s i s have been g i v e n i n d e t a i l .
A l s o w i t h r e f e r e n c e to F. udum B u t l . , w h i c h
causes w i l t disease o f p i g e o n p e a .
SUBRAMANIAN, K . S . , G. SATHIABALAN SAMUEL,
R. JANARTHANAN, and T.K. KANDASWAMY. 1973.
S t u d i e s o f t h e v a r i e t a l r e s i s t a n c e o f
pigeonpea (Cajanus c a j a n L.) t o s t e r i l i t y
mosaic d i s e a s e . Madras A g r i c . J .
6 0 ( 1 ) : 3 8 - 4 0 . 1102
A l l 549 v a r i e t i e s s t u d i e d were s u s c e p t i b l e
b u t a r e c l a s s i f i e d i n t h r e e c a t e g o r i e s
depending o n t h e s e v e r i t y o f v i r u s i n f e c t i o n
o b s e r v e d .
SUBRAMANIAN, S. 1 9 6 1 .
S t u d i e s o n the w i l t o f pigeonpea. Ph.D.
(1961) T h e s i s . U n i v e r s i t y o f Madras,
Madras, Tamil Nadu, I n d i a . 1103
SUBRAMANIAN, S. 1963.
Fuearium w i l t o f pigeonpea. I . Symptomol
o g y and i n f e c t i o n s t u d i e s . P r o c . I n d i a n
Acad. S c i . ( S e c t . B) 5 7 : 1 3 4 - 1 3 8 . 1104
The p a t h o g e n i c i t y o f f o u r i s o l a t e s o f
F. udum was t e s t e d on s i x v a r i e t i e s of
Cajanus c a j a n NP-15 proved to be the l e a s t
s u s c e p t i b l e and i t i s suggested t h a t n o
spores are produced in t h a t v a r i e t y as a
r e s u l t o f t h e l a c k o f p r o p e r s u b s t r a t e i n
t h e r o o t system or the a c t i o n of some
i n h i b i t o r y substance i n the x y l e m .
SUBRAMANIAN, S. 1963.
Fusarium w i l t o f pigeonpea. I I . Changes i n
the h o s t m e t a b o l i s m . P r o c . I n d i a n Acad.
S c i . ( S e c t . B) 5 7 : 1 7 8 - 1 9 4 . 1105
I n h e a l t h y p l a n t s o f the t h r e e v a r i e t i e s
s t u d i e d , c o n t e n t o f c h l o r o p h y l l , a s c o r b i c
a c i d , f r e e r e d u c i n g s u g a r s , and t o t a l M n
were h i g h e s t i n t h e l e a s t s u s c e p t i b l e
v a r i e t y , NP-15, and l o w e s t i n t h e most
s u s c e p t i b l e , NP-24. I n NP-24, the r o o t s
c o n t a i n e d more t o t a l c a r b o h y d r a t e s than t h e
s h o o t s , whereas in NP-15 t h e r e v e r s e was
t r u e . The Fe/Mn r a t i o i n c r e a s e d w i t h
i n c r e a s i n g s u s c e p t i b i l i t y . I n i n o c u l a t e d
p l a n t s , l o w e r s u s c e p t i b i l i t y was a s s o c i a t e d
w i t h a s m a l l e r r e d u c t i o n i n c o n t e n t s o f
c h l o r o p h y l l , a s c o r b i c a c i d , and t o t a l
c a r b o h y d r a t e s .
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