Download - OAR@ICRISAT

P a t h o l o g y
d i d n o t r e t a r d growth o f s e e d l i n g s b u t
lower c o n c e n t r a t i o n s ( 2 . 5 µ g / m l to 0 . 1 µg/
ml) s t i m u l a t e d g r o w t h . Shoot was n o t i c e -
a b l y a f f e c t e d above 10 µ g / m l . There was
r o l l i n g and m o t t l i n g o f t h e l e a v e s a t
h i g h e r c o n c e n t r a t i o n s . I n t h e presence o f
t h e a n t i b i o t i c , r o o t s became e x c e s s i v e l y
b r a n c h e d , c u r l e d , and h a i r y ; r o o t s t u n t i n g
was observed from 5 µ g / m l and above.
CHAKRAVARTHI, B.P. 1952.
W i l t o f a r h a r (Cajanus c a j a n ) i n B i h a r .
Causal o r g a n i s m . Fusarium udum B u t l .
B i h a r A g r i c . C o l l . Mag. 3 ( 1 ) : 9 - 1 0 . 889
CHAUBE, H.S. 1968.
Combating diseases of arhar and gram.
I n d i a n Fmr D i g e s t 1 ( 7 ) : 2 6 - 2 7 . 890
A number of p u l s e crops are grown in I n d i a .
Most o f t h e diseases a t t a c k i n g these crops
can b e e f f e c t i v e l y c o n t r o l l e d b y s u i t a b l e
p r o t e c t i v e measures a t the r i g h t t i m e . The
pigeonpea diseases d i s c u s s e d are w i l t and
s t e r i l i t y mosaic. W i l t disease becomes
apparent when t h e p l a n t s a r e 5 to 6 week
o l d . Vascular t i s s u e s o f t h e lower stem
and r o o t s a r e blackened i n s t r e a k s o r
p a t c h e s . This d i s c o l o r a t i o n i s c l e a r l y
v i s i b l e when t h e b a r k o f t h e lower stem i s
peeled o f f . Losses from t h i s d i s e a s e can
b e m i n i m i z e d b y g r o w i n g w i l t - r e s i s t a n t
v a r i e t i e s such as NP(WR)-15, - 1 6 , and - 4 2 .
CHAUDHARY, S . K . , and M. PRASAD. 1974.
V a r i a t i o n s i n sugar c o n t e n t s o f h e a l t h y
and Fusarium oxysporum f. udum i n f e c t e d
p l a n t s of Cajanus c a j a n . P h y t o p a t h . Z.
8 0 ( 4 ) : 3 0 3 - 3 0 5 . 891
Glucose was p r e s e n t in h e a l t h y shoot and
r o o t e x t r a c t s o f a l l t e n v a r i e t i e s analyzed.
Sucrose was p r e s e n t in h e a l t h y shoots of
s i x v a r i e t i e s and h e a l t h y r o o t s o f t h r e e
v a r i e t i e s ; f r u c t o s e i n h e a l t h y shoots o f
seven v a r i e t i e s and h e a l t h y r o o t s of one
v a r i e t y . R a f f i n o s e and m a l t o s e were
d e t e c t e d i n t h e h e a l t h y r o o t s and shoots
o f v e r y few v a r i e t i e s . A f t e r i n f e c t i o n
by F. oxysporum, a r a p i d d e p l e t i o n of
sugars was d e t e c t e d i n a l l v a r i e t i e s . The
most s u s c e p t i b l e v a r i e t i e s , E a r l y 269 and
E a r l y 348, showed t h e h i g h e e t d e p l e t i o n .
CIFERR1, R., and FRAGOSO R. GONZALEZ. 1927.
P a r a s i t i c and s a p r o p h y t i c f u n g i o f the
Dominican R e p u b l i c ( 1 0 t h s e r i e s ) . B o t . R.
Soc. E s p i n o l a H i s t . N a t . 2 7 : 1 6 5 - 1 7 7 . 892
Cercospora cajani was found on l i v i n g
leaves of Cajanus indicus.
COSTA, A . S . , J. FRANCO DO AMARAL, A . P . VIEGAS,
D.M. SILVA, C.G. TEIXEIRA, and E.D. PINHEIRO.
1957.
B a c t e r i a l h a l o b l i g h t o f c o f f e e i n B r a z i l .
P h y t o p a t h . Z. 28(4) :427-444. 893
Pseudomonas s p p . , r e s p o n s i b l e f o r c a u s i n g
h a l o b l i g h t , a l s o gave p o s i t i v e r e a c t i o n
when i n o c u l a t e d i n t o pigeonpea.
DAKE, G.N. 1974.
S t u d i e s on Fusarium oxysporum f. udum
( B u t l . ) Snyder and Hansen causing w i l t of
t u r . Cajanus ( L . ) M i l l s p . M.Sc. (1974)
T h e s i s . Marathwada K r i s h i V i d y a p e e t h ,
P a r b h a n i , M a h a r a s h t r a , I n d i a . 894
DALE, W.T. 1943.
P r e l i m i n a r y s t u d i e s o f the p l a n t v i r u s e s
o f T r i n i d a d . T r o p . A g r i c . ( T r i n i d a d )
2 0 ( 1 2 ) : 2 2 8 - 2 3 5 . 895
Pigeonpea s e e d l i n g s were i n f e c t e d w i t h
cowpea mosaic in greenhouse.
DALE, W.T. 1949.
O b s e r v a t i o n s on a v i r u s d i s e a s e of cowpea
i n T r i n i d a d . Ann. A p p l . B i o l . 3 6 ( 3 ) :
327-333. 896
Symptoms of cowpea mosaic on pigeonpea.
Ceratoma ruficornis is an e f f i c i e n t v e c t o r .
DASTUR, J . F . 1946.
Report o f t h e I m p e r i a l M y c o l o g i s t . S c i e n t .
Rep. A g r i c . Res. I n s t . New D e l h i 1944-45:
6 6 - 7 2 . 897
O f 2 8 pigeonpea v a r i e t i e s t e s t e d f o r t h e i r
r e a c t i o n s to F. udum, IP-80 was immune,
I P - 4 1 and H y b r i d - 5 (D-419-2-4) showed up
to 5% i n f e c t i o n , and the r e s t were h i g h l y
s u s c e p t i b l e t o w i l t . I n a n i n f e s t e d f i e l d
p l o t I P - 8 0 developed 4% i n f e c t i o n , C-15,
A - 1 2 6 - 4 - 1 , and Thadgam 1-4-7 up to 7%,
I P - 4 1 12%, and t h r e e o t h e r s were h i g h l y
s u s c e p t i b l e .
DEIGHTON, F.C. 1929.
Report o f t h e m y c o l o g i c a l s e c t i o n . Ann.
Rep. Lands and F o r e s t s Dep. S i e r r e Leone
f o r the year 1928: 1 4 - 1 9 . 898
A r u s t (Uredo c a j a n i ) was found to be
common on t h e o l d e r leaves of p i g e o n p e a .
DEIGHTON, F.C. 1932.
M y c o l o g i c a l w o r k . Ann. Rep. A g r i c . Dep.
S i e r r e Leone f o r the year 1 9 3 1 : 2 0 - 2 5 . 899
Rhizoctonia w i t h l a r g e s c l e r o t i a was found
on maize and pigeonpea.
115