Management of Cercospora Leaf Spot of Indian Spinach (Basella alba L.) with BAU Bio-fungicide and a Plant Growth Promoting Hormone

Md Mohidul Hasan,Shamima Naznin,Kishowar E-Mustarin,Md Mobinul Islam,Nazia Binta Islam

doi:10.13189/ujps.2016.040401

Abstract

Trichoderma based BAU-biofungicide, chemical Carbendazim and a synthetic plant growth promoting (PGP) hormone have been used to study their effect on Cercospora leaf spot of Indian spinach. Number of leaf, number of infected leaf, disease incidence, disease severity, area under disease progress curve (AUDPC), plant height and plant weight were measured and significant variations was found against different treatment combinations. Among the treatment combinations, seed treating with Carbendazim followed by foliar spray with Carbendazim, seed coating with BAU bio-fungicide followed by foliar spray with Carbendazim, only foliar spray with Carbendazim and only spray of PGP hormone significantly reduced disease incidence and severity with increasing of plant height and weight. Interestingly, foliar application of PGP hormone reduces disease incidence and severity by 58.38% and 63.8% in both the variety of Indian spinach, respectively over control, whereas; in both the variety disease incidence and severity is reduced by seed treatment with Carbendazim followed by foliar spray with Carbendazim 69.72% & 77.63%; seed treatment with BAU bio-fungicide followed by foliar spray with Carbendazim 63.73% & 69.49%; foliar spray with Carbendazim 55.68% & 58.19%, respectively. Foliar application of PGP hormone along with the reducing of disease incidence and severity, also increases the leaf number by 68.62%, plant height by 54.64% and plant weight by 65.69% over control. AUDPC showed that, local variety of Indian spinach is more susceptible to Cercospora leaf spot than BARI spinach 1.

Highlights

IntroductionBasellaceae is an indigenous, rapidly growing, tropical leafy vegetable [1,2] commonly grown as backyard plant in the home gardens
Indian spinach (Basella alba L.) belongs to the familyBasellaceae is an indigenous, rapidly growing, tropical leafy vegetable [1,2] commonly grown as backyard plant in the home gardens
Eight different treatment combination to manage the Cercospora leaf spot disease as following combinations: T0: control, T1: seed coating with BAU bio-fungicide followed by foliar spray with suspension, T2: seed treating with Carbendazim followed by foliar spray with Carbendazim, T3: seed coating with BAU bio-fungicide followed by foliar spray with Carbendazim, T4: seed treating with Carbendazim, T5: seed coating with BAU bio-fungicide, T6: foliar spray with Carbendazim and T7: foliar spray with plant growth promoting (PGP) hormone

Summary

Introduction

Basellaceae is an indigenous, rapidly growing, tropical leafy vegetable [1,2] commonly grown as backyard plant in the home gardens It is originated from India or Indonesia [3], ; it is popular in tropical and subtropical region including Asia, America, Africa, Madagascar etc. The vegetable has other interesting common names in different region like Ceylon spinach, Malabar spinach, saan choy (Chinese), mongtoi (Vietnamese), alugbati (Philippines), puisaag (Bengali), remayong (Malay) etc. It is low content of carbohydrate and fat but holds good amount of vitamins (Vitamin-A -3250IU/100g), minerals Iron 1.4%, Calcium 0.15%, and Antioxidants (ß-carotene, lutein, zea-xanthin) [1]. Due to Cercospora leaf spot disease, photosynthetic process is disturbed and leaves becomes deformed resulting weakens plant, premature defoliation which lowers the yield and market value

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