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Management of Little Leaf Disease of Brinjal

M. R. Humauan
Scientific Officer
RARS, Ishurdi, Pabna

K. M. Khalequzzaman
Senior Scientific Officer
RARS, Ishurdi, Pabna

B. Akhter
Scientific Officer
RARS, Ishurdi, Pabna

Abstract/ Executive Summary:

An experiment was conducted at RARS, Ishurdi, Pabna during 2010-11 to find out the effective management practice against little leaf disease of brinjal. Variety BARI brinjal-6 was used in this experiment .The lowest incidence of little infected plant (15.00 % ) was recorded in Imitaf (0.025 %) sprayed plots and the highest (47.22%) was recorded in control plots. The yield ranged from 11.42 to 26.89 t/ha, the highest and lowest yields were recorded in Imitaf (0.025%) sprayed plots and untreated control, respectively.

Keywords: Little leaf, Brinjal, Neem oil

Location: RARS, Ishurdi, Pabna

Start Date:

End Date:

Program Area: Pest Management

Commodity: Brinjal

Objectives:

To find out the effective management practice against little leaf disease of brinjal

Methodology:

The experiment was conducted at the RARS, Ishurdi, Pabna during rabi season 2010-11. Brinjal variety BARI brinjal-6 was used in this experiment. The seeds were sown on November 8, 2010 and transplanted in the main field on December 6, 2010. The experimental design was RCBD with three replications. The unit plot size was 3mX2m and spacing was 60cmX50cm. Seven treatments comprising T₁ = diseased plant uprooting, T₂=Naphthelene (1 ball/hill), T₃= Spray of Imitaf (0.025%), T₄ = Neem oil (0.5%) + Trix (0.5%), T₅ = Sesame oil(0.5%)+ Trix (0.5%), T₆ = Mustard oil (0.5%),+ Trix (0.5%), T₇= Control. The treatments T₃, T₄, T₅ and T₆ applied 5 times at 10 days interval. Spraying was initiated at 50 days after transplanting when disease symptom was observed in the field. Fertilizers and manures were applied as per recommendation. Irrigation and other cultural practices were performed as and when necessary. Data were recorded on number of little leaf infected plant, number of fruits/plant, plant height (cm), branches/plant and yield (t/ha). Disease incidence was calculated by the standard formula. Disease incidence (%) = The recorded data were analyzed statistically to find out the level of significance and the variations among the respective data. Treatment means were compared following Duncan’s New Multiple Range Test (DMRT).

Source of Information: Annual Report , Plant Pathology Division, 2010-11

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All the treatments significantly reduced the disease as compared to control. The highest incidence of little leaf infected plant (47.22 %) was obtained from control plots while the lowest (15.00%) was recorded in Imitaf (0.025 %) sprayed plots. Disease reduction over untreated control ranged from 29.41 – 68.23%, where the highest reduction was recorded in Imitaf (0.025 %) sprayed plots and the lowest was in Sesame oil (0.5%). All the treatments showed significant effect on plant height, yield and yield attributes of brinjal plants except branches per plant. The highest plant height at harvest (102.9 cm) was recorded in Imitaf (0.025 %) sprayed plots and the lowest (89.93 cm) was recorded in control plots. The highest number of fruits per plant (6.89) was observed in Imitaf (0.025 %) sprayed plots and the lowest (2.44) was in control plots. The highest yield (26.89 t/ha) was recorded in Imitaf (0.025 %) sprayed and the lowest (11.42 t/ha) was recorded in control plots.

Knowledge Management: Report/Proceedings