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Pathology
SHUKLA, D.S. 1975.
I n c i d e n c e o f Fuearium w i l t o f pigeonpea i n
r e l a t i o n t o s o i l c o m p o s i t i o n . I n d i a n
P h y t o p a t h . 2 8 ( 3 ) : 3 9 5 - 3 9 6 . 1077
Fuearium udum c a u s i n g w i l t of pigeonpea
p l a n t s i n I n d i a i s i n f l u e n c e d b y s o i l comp
o s i t i o n : t h e h i g h e r t h e p r o p o r t i o n o f
sand i n t h e s o i l , t h e more the percentage
o f w i l t .
SIDERIS, C.P. 1929.
P y t h i a c e o u s r o o t p a r a s i t e s o f v a r i o u s a g r i ­
c u l t u r a l p l a n t s . P h y t o p a t h . 1 9 ( 1 2 ) :
1140 ( A b s t r a c t ) . 1078
Pigeonpea was found s u s c e p t i b l e to most of
Pythium s p p . i s o l a t e d from v a r i o u s c r o p s .
SIDERIS, C.P. 1932.
Taxonomic s t u d i e s i n t h e f a m i l y P y t h i a c e a e .
2. Pythium. M y c o l o g i a 2 4 ( 1 ) : 1 4 - 6 1 . 1079
Pythium splendens v a r . hawaiianum n. v a r . ,
a very a g g r e s s i v e p a r a s i t e of p i n e a p p l e
r o o t s , i s m o d e r a t e l y p a r a s i t i c o n those o f
t h e pigeonpea and s e v e r a l o t h e r p l a n t
species i n H a w a i i .
SINGH, D . V . , and A . N . MISHRA. 1976.
Search f o r w i l t - r e s i s t a n t v a r i e t i e s o f r e d
gram i n U t t a r Pradesh. I n d i a n J . M y c o l .
P I . P a t h o l . 6(1) : 8 9 . 1080
Some o f t h e v a r i e t i e s o f r e d gram, v i z . ,
C-11, C-28, C-36, F-18, NP(WR)-15, N P - 4 1 ,
and T-17 w h i c h were e a r l i e r r e p o r t e d to be
r e s i s t a n t o r t o l e r a n t t o w i l t have proved
s u s c e p t i b l e . Some l i n e s , Bori 1 9 2 - 1 2 - 5 - 1 - 2
and B o r l 1 9 2 - 1 5 - 2 - 2 - 1 1 - 4 2 were m o d e r a t e l y
r e s i s t a n t .
SINGH, G.P. 1965.
S t u d i e s o n w i l t o f a r h a r . Ph.D. (1965)
T h e s i s . Agra U n i v e r s i t y , A g r a , U t t a r
P r a d e s h , I n d i a . 1081
SINGH, G . P . , and A. HUSAIN. 1962.
P r o d u c t i o n o f p e c t i c and c e l l u l o l y t i c
enzymes b y a r h a r w i l t f u n g u s . C u r r . S c i .
3 1 : 1 1 0 - 1 1 2 . 1082
S t u d i e s o n t h e r o l e o f enzymes i n t h e
pathogenesis of Fuearium lateritium f. s p .
c a j a n i , t h e agent o f pea w i l t , r e v e a l e d
t h a t the fungus produces c e l l u l o s e a s w e l l
a s p o l y g a l a c t u r o n a s e i n c u l t u r e , and these
may p l a y a r o l e in t h e disease syndrome.
SINGH, G . P . , and A. HUSAIN. 1964.
Presence o f f u s a r i c a c i d i n w i l t - a f f e c t e d
pigeonpea p l a n t s . C u r r . S c i . 33(9) : 2 8 7 . 1083
Chromatographic d e m o n s t r a t i o n showed t h e
presence o f f u s a r i c a c i d i n a l l a f f e c t e d
p a r t s ( r o o t s , s t e m , and l e a f ) a f t e r i n o c u ­
l a t i o n o f s u s c e p t i b l e v a r i e t y T-105 w i t h
mycelium and spores o f v i r u l e n t i s o l a t e s
of Fuearium lateritium f. s p . eajani.
SINGH, G . P . , and A. HUSAIN. 1968.
Role of enzymes in pathogenesis by Fuearium
lateritium f . c a j a n i . I n d i a n P h y t o p a t h .
2 1 ( 4 ) : 3 6 1 - 3 7 3 . 1084
D e g r a d a t i o n o f c e l l w a l l s and d i s o r g a n i z a ­
t i o n o f v e s s e l s were e v i d e n t i n s e c t i o n s o f
r o o t s and stems of i n f e s t e d a r h a r p r e s e n t
i n these s e c t i o n s . The main f u n c t i o n o f
these enzymes in pathogenesis by F. l a t e r i -
tium f. c a j a n i is to cause t h e breakdown
o f t h e host t i s s u e .
SINGH, G . P . , and A. HUSAIN. 1970.
Role of t o x i c m e t a b o l i t e s of Fuearium lateritium
f. eajani (Padw.) Gord. in t h e development
o f pigeonpea w i l t . P r o c . N a t .
Acad. S c i . I n d i a . ( S e c t . B) 4 0 : 9 - 1 5 . 1085
SINGH, N.D. 1975.
E f f e c t o f oxamyl a p p l i c a t i o n s o n eelworm
p e n e t r a t i o n i n t o r o o t s o f t o m a t o , l e t t u c e
and pigeonpea. T r o p . A g r i c . ( T r i n i d a d )
5 2 : 3 6 9 - 3 7 3 . 1086
I n glasshouse t e s t s a s i n g l e f o l i a r a p p l i ­
c a t i o n of oxamyl of 2,500 ppm i n h i b i t e d
s i g n i f i c a n t l y t h e p e n e t r a t i o n o f pigeonpea
s e e d l i n g s by Rotylenehulue reniformis.
SINGH, N.D. 1975.
S t u d i e s on t h e s e l e c t e d h o s t s of Rotylenehulu8
reniformis and i t s p a t h o g e n i c i t y to
soybean (Glycine max). Nematropica
5 ( 2 ) : 4 6 - 5 1 . 1087
S i x p l a n t species were t e s t e d f o r h o s t
s u i t a b i l i t y to if. reniformis. Tomato,
pigeonpea, and w a t e r g r a s s s u p p o r t e d l a r g e
p o p u l a t i o n i n c r e a s e s b u t t h e nematode
p o p u l a t i o n d e c l i n e d under Bermudagrass
(Cyanodon dactylon) a f t e r 10 weeks. S i g n i ­
f i c a n t r e d u c t i o n s o c c u r r e d i n d r y w e i g h t s
o f tops and r o o t s and l i n e a r growth o f
i n f e c t e d soybean p l a n t s 8 weeks a f t e r
t r a n s p l a n t i n g i n t o n a t u r a l l y i n f e s t e d s o i l .
I n i t i a l l a r v a e p o p u l a t i o n s o f 500 and 1,000
R. r e n i f o r m i s reduced t h e mean w e i g h t s of
r o o t s by 14.7 and 53.7%, t h e tops by 37.0
and 54.7%, and l i n e a r top growth of soybean
by 2 3 . 1 and 27.5% r e s p e c t i v e l y , when compared
w i t h n o n i n o c u l a t e d c o n t r o l s .
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