Journal of Applied and Natural Science 6 (2): 913-919 (2014)
Fungicidal effect of some non-conventional chemicals for management of alternaria blight disease of mustard.
Amarendra Kumar1*, Santosh Kumar1, Rakesh Kumar2,Gireesh Chand1 and S. J. Kolte3
1Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur-821310 (Bihar), INDIA
2Department of Soil Science and Agricultural Chemistry, Bihar Agricultural University, Sabour, Bhagalpur-821310 (Bihar), INDIA
3Department of Plant Pathology, Govind Ballabh Pant University of Agriculture & Technology, Pantnagar -263145, (Uttarakhand), INDIA
*Corresponding author. E-mail: email@example.com
Alternaria blight disease of mustard caused by a necrotrophic fungus
Alternaria brassicae (Berk.) Sacc. Is one of the most important limiting
factors, causing yield losses of up to 47% in mustard (Brassica juncea).
The aim of this present investigation was to evaluate the fungicidal effect of
non-conventional chemicals viz. calcium sulphate (CaSO4),
potassium chloride (KCl), potassium sulphate (K2SO4), zinc sulphate
(ZnSO4) and borax (Na2B4O7.10H2O)
against alternaria blight disease of mustard. The significantly minimum size of
spot was recorded in T1 CaS at 0.5% (1.73)
followed by T3 CaS at 1.5% (1.75) and T2 CaS at 1.0% (1.78) respectively in comparison to check. The minimum number of average leaf spots/25 mm2 leaf area was observed in
T3 CaS at 1.5% (1.78) followed by T1 CaS at 0.5% (2.26). T1 CaS @ at 0.5% showed significantly lowest disease index (13.00%) followed by T15 NaB at 0.75% (17.77%) and T8 KS
at 1.0% (18.00%) respectively over check. The average minimum apparent infection rate was recorded in T1 CaS at 0.5% ( 0.504) followed by T9 KS at 1.5% (0.553) and T3 CaS at
1.5% (0.573) respectively. The AUDPC was significantly minimum in all the treatments of CaSO4 i.e. in T1 CaS at 0.5% (32.25), T2 CaS at 1.0% (33.8) and T3 CaS at 1.5% (35.55)
in comparison to check (77.95). The foliar spray of CaSO4 at 0.5% concentration induced resistance significantly against alternaria blight and reduce pesticide residue in food
Keywords : Alternaria blight, Alternaria brassicae (Berk.) Sacc., Mustard, Non-conventional chemicals.