Experiment code 21.3.3.28
Experiment Title Evaluation of fungicides against leaf blight (Alternaria sp.) of tuberose
Research Type Departmental Research
Experiment Background  Tuberose (Polianthes tuberosa L.) is under the family of Amaryllidaceae, is a bulbous ornamental flowering plant of tropical and subtropical areas. In India the flower is known by the local name, Rajanigandha.  Tuberose is used to decorate in the table because it has long spike length, long post-harvest life and extremely good fragrance due to the presence of geraniol, nerol, benzyl alcohol, eugenol, and methyl anthranilate. It is commercially cultivated mainly as cut and loose flower trade and also for the extraction of highly valued natural flower oil.  The cultivation of tuberose seems to be promising in respect of its commercial value but the most important factor that affects its cultivation drastically is the disease problem.  Tuberose flower crops are affected by fungal diseases along with bacteria, nematodes and viruses such as bulb rot (Sclerotium rolfsii), Botrytis blight (Botritis cinerea), Alternaria leaf spot (Alternaria polyanthi), blossom blight (Fusarium equiseti), leaf tip blight (Phoma sp.), peduncle blight (Lasidiplodia theobromae), flower rot (Erwinia sp.), greasy leaf streak (Aphelenchoides besseyi) and Tuberose mild mosaic disease (Tuberose mild mosaic virus).  Among all the diseases of tuberose, leaf blight caused by Alternaria sp. is the most devastating.  Leaf blight disease is characterized by the appearance of circular to irregular shaped lesions on the leaves, which can range in colour from brown to black. Alternaria pathogen, leading to the rapid spread of the disease across tuberose fields (Timmer et al. 2003). The lesions can rapidly coalesce, leading to the blighting and drying of the leaves, which can significantly impact the overall growth and yield of the tuberose plants. In severe cases can result in the premature dropping of the flowers and buds . (Sadhukhan et al. 2022).  During recent years the incidence of this disease in South Gujarat region is on increase.  Hence, the present investigation will be carried out for the management of disease.
Experiment Group Plant Protection
Unit Type (02)EDUCATION UNIT
Unit (13)ASPEE COLLEGE OF HORTICULTURE (NAVSARI)
Department (220)Plant Protection, ACHF, Navsari
BudgetHead (329/12237/00)329/03/REG/01815
Objective

To evaluate the effective fungicides for the management of leaf blight of tuberose

Season Kharif
Location Unit Type (02)EDUCATION UNIT
Location Unit (13)ASPEE COLLEGE OF HORTICULTURE (NAVSARI)
Location Department (220)Plant Protection, ACHF, Navsari
Plot No Flowriculture farm
PI Name (NAU-EMP-2013-000972)VIRAL PRAHLADBHAI PRAJAPATI
PI Email virpathologist@nau.in
PI Mobile 9601278020
Year of Approval 2025
Commencement Year 2026
Completion Year 2029
Design of Experiment

RBD

Crop Spacing (cm x cm)

30x30cm

Gross Plot (m x m) 1.20m +0.40m path x 2.10m
Net Plot (m x m) 1.20m +0.4m path x 1.50m
Total Experiment Area (m2) NA
Plot History Last Three Year

Tuberose

Initial Soil Sample Analysis Report

NA

Initial Soil Sample Analysis Report Attachment Attachment Not Available!
Layout Plan

NA

Layout Plan Attachment Attachment Not Available!
Treatment

Tr. No.

Treatment

Conc.(%)

Quantity required per1litreofwater

T1

 Tebuconazole 50% + Trifloxystrobin 25% WG 

0.075

1g/lit

T2

Tebuconazole 50% + Trifloxystrobin 25% WG 

0.094

1.25g/lit

T3

Tebuconazole 50% + Trifloxystrobin 25% WG  

0.15

2g/lit

T4

 Fluxapyroxad 250 g/l + pyraclostrobin 250 g/l SC

0.5

1g/lit

T5

Fluxapyroxad 250 g/l + pyraclostrobin 250 g/l SC

0.625

1.25g/lit

T6

Fluxapyroxad 250 g/l + pyraclostrobin 250 g/l S

1.0

2g/lit

T7

Chlorothalonil 40% + Difenoconazole 4%SC

0.044

1g/lit

T8

Chlorothalonil 40% + Difenoconazole 4%SC

0.055

1.25g/lit

T9

Chlorothalonil 40% + Difenoconazole 4%SC

0.088

2g/lit

T10

Control

-

-

 

Treatment Attachment Attachment Not Available!
(NAU-EMP-2013-000972) VIRAL PRAHLADBHAI PRAJAPATI virpathologist@nau.in 9601278020 10-03-2026
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