FUNGICIDAL CONTROL OF FOLIAR DISEASES OF GROUNDNUT IN SAMARU, NORTHERN NIGERIA
FUNGICIDAL CONTROL OF FOLIAR DISEASES OF GROUNDNUT IN SAMARU, NORTHERN NIGERIA
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Date
1986-02
Authors
Ndedu, Sylvia
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Abstract
Two experiments were c a r r i e d out for the c o n t r ol
of l e a f s p o t s and r u s t of groundnut. The t r i a l s were
conducted in 1982 and 1983 at Samaru which r e p r e s e n ts
t h e Northern Guinea Savanna zone.
In one experiment, two f o r m u l a t i o n s of mancozeb
(ULV and w e t t a b l e power) were a p p l i e d to groundnut as
u l t r a - l o w volume and medium volume sprays u s i n g the
s p i n n i n g d i s c and the CP3 knapsack s p r a y e r . Different
r a t e s of the f u n g i c i d e s were used. The a p p l i c a t i o n of
2 , 0 0 kg/ha of the w e t t a b l e powder f o r m u l a t i o n and 4L/ha
of the ULV f o r m u l a t i o n were found to be most s u i t a b l e.
The u l t r a - l o w volume sprays r e s u l t e d in good c o n t r ol
of l e a f s p o t s and r u s t as did the medium volume s p r a y s.
The higher r a t e s of f u n g i c i d e f o r m u l a t i o n s r e s u l t e d in
lower d i s e a s e s e v e r i t y . The use of w e t t a b l e powder
f o r m u l a t i o n was however found to be cheaper except in
c a s e s of extreme water s h o r t a g e.
I n the second experiment, Calixin-M was a p p l i e d to
groundnut at d i f f e r e n t times of commencement and d i f f e r e nt
i n t e r v a l s of s p r a y i n g . There was no s i g n i f i c a n t d i f f e r e n ce
i n the times of commencement in the d i s e a s e c o n t r o l.
Spraying at 7- and 14-day i n t e r v a l s r e s u l t e d in more
e f f e c t i v e and s i g n i f i c a n t l y higher pod and haulm y i e l ds
of groundnut than 21-day i n t e r v a l s . Spraying regime
commencing at f i r s t appearance of d i s e a s e symptoms and
a p p l i e d at 14-day i n t e r v a l s was found to be the b e s t.
Description
A thesis submitted to the Postgraduate School of Ahmadu
Bello University, Zaria, in partial fulfillment of the
requirements for the award of the Degree of Master of
Science (Crop Protection).
Department of Crop Protection
Faculty of Agriculture
Ahmadu Bello University, Zaria
Nigeria
FEBRUARY 1986
Keywords
FUNGICIDAL,, CONTROL,, FOLIAR,, DISEASES,, GROUNDNUT,, SAMARU,, NORTHERN,, NIGERIA.