In-vitro Evaluation of Some Fungicides against Botrydiplodia theobromae: Causal Pathogen of Pineapple Dieback
Journal Title: Journal of Experimental Agriculture International - Year 2016, Vol 11, Issue 5
Abstract
Aims: Dieback is an economically important disease known to cause major losses in food and tree crops. The causal pathogen of pineapple dieback was investigated and the efficacies of some fungicides were evaluated in-vitro. Study Design: Pineapple suckers were planted with a spacing of 0.5 m x 0.5 m and separated by 1.0 m. Leaf and soil samples were randomly collected from diseased pineapple plants and the rhizosphere of the pineapple respectively. Place and Duration of Study: The experiment was conducted at the National Horticultural Research Institute field in 2014. Methodology: The samples were inoculated on potato dextrose agar and pure culture of fungal pathogen responsible for pineapple dieback obtained. The efficacies of three fungicides namely: Z- force (a. i 80% Mancozeb), Forcelet (a.i 50% carbendazim), and Funguforce (63% mancozeb + 12.5% carbendazim) were tested in-vitro on mycelial growth inhibition of the causal agent. Results: Pathogens isolated from diseased leaves were Botrydiplodia theobromae and Aspergillus niger while Aspergillus niger, Aspergillus tamari, Botrydiplodia theobromae and Fusarium verticilliodes were isolated from the rhizosphere. On the infected leaf samples, B. theobromae had the highest occurrence (93.3%) while Aspergillus niger had the least occurrence (6.7%). Similar trend was observed in the soil samples where B. theobromae had the highest occurrence of 80% while A. tamari and F. verticilliodes had the least frequency of occurrence of 4%. Pathogenicity test revealed that B. theobromae was the causal pathogen of pineapple dieback. The three fungicides evaluated were able to inhibition the mycelial growth of B. theobromae. Conclusion: The study revealed that B. theobromae was responsible for pineapple dieback and the three fungicides were able to control it in-vitro.
Authors and Affiliations
Eniola Omotola Oyedeji, Kehinde Titilope Kareem
Keywords
Related Articles
- EP ID EP351378
- DOI 10.9734/AJEA/2016/23238
- Views 62
- Downloads 0
Effects of Foliar Application of Boron (B) on the Grain Set and Yield of Wheat (Triticum aestivum L.)
Aims: The objective of this study was to evaluate the effect of foliar application of boron (B) on the grain set and yield of wheat (cv. Shatabdi). Study Design: The experiment was designed with six boron treatments, arr...
Study of Cultural and Morphometric Characters of Fusarium xylarioides Strains Isolated from Coffee Trees Infected with Coffee Wilt Disease Collected from Eastern, North Kivu and Equateur Provinces, Democratic Republic of Congo
Aim: To determine cultural and morphometric characters of different strains of Fusarium xylarioides isolated from coffee trees collected from Eastern, North Kivu and Equateur provinces of Democratic Republic of Congo (DR...
Nutrient Digestibility and Growth Performance of Finisher Broilers Given Dried Xylopia aethiopica Fruits (Grains of Selim) as Additive
The nutrient digestibility and growth performance of finisher broilers given dried Xylopia aethiopica fruits (grains of selim) as additive was investigated. One hundred and ninety five finisher broilers (Arbor acres stra...
Garlic (Allium sativum) Powder as an Additive in Broilers (Finisher Phase) Part 2: Growth Performance, Hypocholesterolemic Effect and Economic Implications
This study was designed to investigate the effects of garlic powder as a phyto-additive in broiler diets as a growth promoter with cholesterolemic properties and to also determine the economic implications when garlic po...
Hybrid Vigor Expression for Some Important Agronomic Traits in Rice Using Diallel Method
Hybrid vigor expression in rice was studied for some agronomic traits in 15 hybrids involving six parents using half diallel mating design. Analysis of variance showed significant differences in parent's vs crosses for a...