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Effect of Fungicides for the Management of Leaf Blotch Disease of Turmeric Caused by Taphrina Maculansbutler

MA Wadud*
Scientific Officer, Spices Research Centre, Bangladesh Agricultural Research Institute, Shibganj, Bogra

MS Naher
Scientific Officer, Spices Research Centre, Bangladesh Agricultural Research Institute, Shibganj, Bogra

AHF Fahim
Scientific Officer, Spices Research Centre, Bangladesh Agricultural Research Institute, Shibganj, Bogra

MB Sarker
Bangladesh Sugarcrop Research Institute Ishurdi,Pabna, Bangladesh

MJ Uddin
Scientific Officer, Bangladesh Sugarcrop Research Institute Ishurdi,Pabna, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at Spices Research Centre (SRC), Bangladesh Agricultural Research Institute (BARI), Shibganj, Bogra during April 2013 to February 2015 to find out effect of various fungicides for the management of leaf blotch of turmeric caused by Taphrina maculans Butler. Eight fungicides namely Sunvit 50 WP (0.3%), Zineb (0.2%), Ridomil gold MZ 68 WP (0.2%), Bavistin DF (0.1%), Antracole 70 WP (0.2%), Bordeaux mixture (1%), Tilt 250 EC (0.05%) and Cabrio top (0.3%) along with control (no spraying) were included as treatment. The experiment was laid out in Randomized Complete Block (RCB) design with three replications. All the fungicides reduced the disease severity significantly over control. Among the fungicides, the lowest disease severity (13.57% PDI in 2013-14 and 13.15 % PDI in 2014-15) was recorded in Cabrio top sprayed plots and the highest (48.07% PDI in 2013-14 and 44.53 % PDI in 2014-15) was in control plots. Lowest leaf area diseased (12.55% in 2013-14 and 12.28% in 2014-15) was recorded in Cabrio top sprayed plots and the highest (50.18% in 2013-14 and 48.07% in 2014-15) was in control plots. Significantly, the highest (66.27% in 2013-14 and 69.50% in 2014-15) percent disease control (PDC) was found in Cabrio top sprayed plots and the lowest (29.53% in 2013-14 and 30.81% 2014-15) was in Bordeaux mixture sprayed plots. The highest yield (35.14 t/ha in 2013-14 and 36.13 t/ha in 2014-15) was recorded from Cabrio top sprayed plots which differed significantly from other treatments. The lowest yield (17.13 t/ha) was recorded in control plots.

Keywords: Turmeric, Leaf blotch, Fungicide, Disease severity, Disease control

Location: Spices Research Centre (SRC), Bangladesh Agricultural Research Institute (BARI), Shibganj, Bogra

Start Date: 00-00-2013

End Date: 00-00-2015

Program Area: Pest Management

Commodity: Fungicide, Turmeric

Objectives:

The present field trial was conducted for managing leaf blotch disease of turmeric by using new fungicides.

Methodology:

The experiment was conducted at Spices Research Centre (SRC), Bangladesh Agricultural Research Institute (BARI), Shibganj, Bogra during 2013-14 and 2014-15. The land was medium high and the soil was clay loam in texture. The experimental plots were prepared with five ploughing and cross ploughing followed by laddering to break down the clods as well as the soil was properly leveled. The weeds and stubbles of previous crops were collected and removed from the soil. The land was fertilized with cow dung@ 5 t/ha, N@ 100 kg/ha, P@ 36 kg/ha, K@ 85 kg/ha, S@ 20 kg/ha and Zn@ 2 kg/ha. The entire quantity of cow dung, P, K, S and Zn were applied as basal dose. 50% of N was applied at 50 days after planting. Remaining 50% N was applied as top dress in two equal splits at 80 and 120 days after planting followed by irrigation. The experiment was carried out following Randomized Complete Block (RCB) design with three replications. Size of the unit plots was 4 m × 2.4 m and plant spacing was 60 cm × 25 cm. Leaf blotch susceptible turmeric variety BARI Turmeric-1 was used in this trial. Rhizomes of BARI Turmeric-1were planted on 16 April, both in 2013-14 and 2014-15 cropping seasons. Eight fungicides with one control treatment were used. The treatments were T1= Sunvit 50 WP (Copper oxychloride)@0.3%, T2= Zineb (Indofil Z-78) @0.2%, T3= Ridomil gold MZ68 WG (Metalaxyl + Mancozeb) @0.2%, T4= Bavistin DF (Carbendazim50%) @0.1%, T5 = Antracole70 WP (Propineb) @0.2%, T6= Bordeaux mixture @0.2%, T7 = Tilt 250 EC (Propiconazole) @0.05%, T8=Cabrio top (Pyraclostrobin 5% + Metiram 55% WG) @0.3%, and T9=Control (no spraying). Insecticide (Darsban) @ 1 ml/L of water was applied in three times at an 10days interval to control thrips. Confidor @ 0.04% was sprayed to the plant for three times at an interval of 10 days to control aphids. All fungicides were used as foliar application. Four spraying were done at an interval of 15 days (110, 125, 140 and 155 days after planting of rhizomes) while the first one was applied at the first appearance of disease symptoms. Data were recorded at 15 days after application of different spray. Three times weeding were done at 15, 30 and 45 days after emergence of rhizome. Three times earthing up were done followed by weeding. Two times irrigation were given at 16 May and 16 October in every year. The plots were inspected regularly to take observations on leaf blotch disease from starting to maturity stage of the crop. Disease plant parts were collected from the field and brought to the laboratory for identifying the causal pathogens of the disease. Data on percent disease index (PDI), leaf area diseased, percent disease infection per plant, percent disease control and yield (t/ha) were recorded. Harvesting of the crop was done on 12 February in both the years. Disease data were recorded on 10 randomly selected plants from each plot just before each spraying and one month after last spraying and followed by 0-6 disease rating scale as suggested by Nambiar et al. (1977).Percent Disease Index (PDI) and Percent Disease Control (PDC) were worked out in each treatment by using the following formula as given by Raoetal. (2013).

Source of Information: Eco-friendly Agril. J. 10(03):24-29, 2017 (March)

Article Link (Online Journal): www.efaj-international.com

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the two years’ study, it is concluded that foliar spray of Cabrio top (Pyraclostrobin + Metiram) @ 0.3% at an interval of 15 days for 4 times being applied the first one at the time of appearance of disease symptoms were effective in managing leaf blotch and increasing yield in turmeric.

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