Evaluation of Taro Germplasm for Resistance to Taro Leaf Blight disease caused by Phytophthora colocasiae and Corm Rot Disease caused by Sclerotium rolfsii in Ghana | Chapter 01 | Agricultural Sciences: Techniques and Innovations Vol. 6

 

Studies to identify resistant varieties to the taro leaf blight disease caused by Phytophthora colocasiae and the corm rot disease caused by Sclerotium rofsii were conducted in the Eastern Region of Ghana in 2015. The studies comprised a laboratory leaf-disc bioassay and a field screening experiment. A total of 539 local accessions were collected from five regions in Ghana and established at Asuansi in the central region. Four local taro accessions (AS0060, CSRI0004, WR0005, and ER0063) that showed some level of tolerance to the taro leaf blight disease were selected after screening with the leaf disc assay and added to 17 other exotic varieties obtained from the Plant Genetics Resources Institute and screened in the field at Bososo in the Eastern Region of Ghana to confirm their resistance. A laboratory leaf disc bioassay was used to confirm the reactions of these accessions in the laboratory. Data was also collected on the reaction of these accessions to the corm rot disease. The data were subjected to analysis of variance using GenStat Discovery version 12. Amongst the 21 taro accessions evaluated, 4 exotic ones were identified to be Resistant (GA/TLBD/0003, GA/TLBD/0010, GA/TLBD/0007 and GA/TLBD/0002) to the TLBD and only one local accession (WR0005) was identified to be Tolerant (R). Most of the Resistant exotic accessions were also identified to be Susceptible to Sclerotium rot, whilst the local accessions were Resistant.

 

Author(s)details:-

 

Frank Kwekucher Ackah
Department of Crop Science, School of Agriculture, College of Agriculture and Natural Science, University of Cape Coast, Ghana.

 

Grace Caselina van der Puije
Department of Crop Science, School of Agriculture, College of Agriculture and Natural Science, University of Cape Coast, Ghana.

 

Elvis Asare-Bediako
Department of Crop Science, School of Agriculture, College of Agriculture and Natural Science, University of Cape Coast, Ghana.

 

KingsleyTaah
Department of Crop Science, School of Agriculture, College of Agriculture and Natural Science, University of Cape Coast, Ghana.

 

Please see the book here:- https://doi.org/10.9734/bpi/asti/v6/6558

A Comprehensive Study on Field Management of Phytophthora Leaf Blight Disease of Cocoyam Taro (Colocasia esculenta L.) with Spray Regimes of Selected Fungicides in Nsukka, Southeastern Nigeria | Chapter 9 | Cutting-edge Research in Agricultural Sciences Vol. 3

 

The purpose of the resent study is to evaluate the effectiveness of fungicides and the spray regimes on the Cocoyam taro leaf blight control in Nsukka, Southeastern Nigeria. Cocoyam taro (Colocasia esculenta L) is a large crop of edible aroid tuber, but blight of cocoyam leaf  The greatest constraints to the development of cocoyam in Phytophthora colocasiae have been caused by  Since 2009, Nigeria. In order to assess the effect of fungicides and spray, field trials were carried out.  Leaf growth regimens, occurrence of disease; severity of disease; and cocoyam tuber yield. The lawsuits  They were carried out at the Crop Science Research Farm Department , University of Nigeria, Nsukka for  Two seasons for planting. Two-fungicide treatments (Ridomil Gold Plus, Ridomil+Champ Dp50 percent:  Mixture and monitor of 50 percent) and five spray regimes (No spray, weekly spray, 2nd weekly spray, 3rd weekly spray)  Weekly spray and 4th weekly spray regimes) were set out in a randomised full 3 x 5 factorial regimen With three replications, block architecture (RCBD). Results showed that there were substantial fungicide therapies (P < 0.05) variance in leaf / stand number, occurrence of disease, severity of disease and tuber Yields / hectare in both seasons of cultivation. There were no substantial differences (P < 0.05) On all calculated parameters in both, between Ridomil and Ridomil+Champ (50 percent:50 percent) mixture) Seasons for crops. ANOVA showed substantial variation in disease occurrence (P < 0.05) among the Ridomil treated plots had the highest fungicides at all trial times in early season planting at 90 DAP, Incidence of disease compared to other choices for fungicides, with the lowest incidence of disease rated By the parcels handled by the power. Taro leaf was substantially reduced by the fungicides and spray regimes Enhanced growth and yields, blight. In weekly spray regimens conducted, Ridomil treated cocoyam plots Best compared to other fungicides and the treatment choices for the spray regime. Besides the adoption of Via integrated disease management (IDM) in Nsukka, Southeastern Nigeria, high yielding resistant cultivar(s), weekly foliar spraying of Ridomil or Ridomil+Champ should be incorporated into taro leaf blight control.


Author (s) Details
 
T. E. Omeje
Department of Agricultural Technology, Enugu State Polytechnic, Iwollo, Enugu State, Nigeria.

Professor K. I. Ugwuoke
Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria.

Professor S. C. Eze
Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria.

Dr. R. A. Ezema
Department of Agricultural Technology, Enugu State Polytechnic, Iwollo, Enugu State, Nigeria.

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