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An experiment was conducted in the field laboratory, Department of Plant pathology, Bangladesh Ag... more An experiment was conducted in the field laboratory, Department of Plant pathology, Bangladesh Agricultural University, Mymensingh to evaluate the efficacy of compost tea and poultry litter extract in controlling late blight of potato and tomato under natural infection condition. Significant effects of different organic amendments were observed on the incidence and severity of late blight in potato and tomato as compared to control. The results showed that the minimum late blight incidence, per cent late blight infected leaves per plant and per cent leaf area diseased per plant were recorded in T 3 (compost tea applied as foliar spray) followed by T 2 (foliar spray of Ridomil) while these parameters of late blight assessment were recorded maximum in control treatment (T 1). Application of IPM lab Biopesticide and BAU-Biofungicide performed better as compared to remaining treatments used in the study. All other components such as soil application of poultry litter, mustard oil cake, soil drenching of compost tea and poultry litter extract resulted significantly lower late blight incidence and severities as compared to untreated control (T 1). Foliar application of compost tea showed best performance in increasing the plant height and yield as compared to all other treatments although soil application of mustard oil cake and compost produced tallest plant and highest number of plants, respectively in potato while the maximum plant height, number branches per plant, and fruit yield in tomato were recorded in case of compost tea applied as soil drench as compared to control. The other treatments showed significant effect in increasing all the growth and yield parameters of both potato and tomato as compared to control. Benefit cost analyses revealed that foliar spray of compost tea showed highest BCR (65.20) followed by T8 (Soil application of IPM Lab Biopesticide) with BCR 54.38 in case of potato while the highest BCR (28.32) was calculated in plots received compost tea as soil drenching followed by T 9 (BAU-Biofungicide as foliar spray) in case of tomato. The other treatments showed comparatively higher BCR as compared to untreated control in both vegetables. The results indicated that an investment of Tk. 1.00 may lead to a profit up to Tk. 65.20 by foliar application of compost tea in potato and may lead to a profit of Tk. 28.32 with soil drenching of compost tea in tomato which are maximum profit in the present study.
An experiment was conducted in the field laboratory, Department of Plant pathology, Bangladesh Ag... more An experiment was conducted in the field laboratory, Department of Plant pathology, Bangladesh Agricultural University, Mymensingh to evaluate the efficacy of compost tea and poultry litter extract in controlling late blight of potato and tomato under natural infection condition. Significant effects of different organic amendments were observed on the incidence and severity of late blight in potato and tomato as compared to control. The results showed that the minimum late blight incidence, per cent late blight infected leaves per plant and per cent leaf area diseased per plant were recorded in T 3 (compost tea applied as foliar spray) followed by T 2 (foliar spray of Ridomil) while these parameters of late blight assessment were recorded maximum in control treatment (T 1). Application of IPM lab Biopesticide and BAU-Biofungicide performed better as compared to remaining treatments used in the study. All other components such as soil application of poultry litter, mustard oil cake, soil drenching of compost tea and poultry litter extract resulted significantly lower late blight incidence and severities as compared to untreated control (T 1). Foliar application of compost tea showed best performance in increasing the plant height and yield as compared to all other treatments although soil application of mustard oil cake and compost produced tallest plant and highest number of plants, respectively in potato while the maximum plant height, number branches per plant, and fruit yield in tomato were recorded in case of compost tea applied as soil drench as compared to control. The other treatments showed significant effect in increasing all the growth and yield parameters of both potato and tomato as compared to control. Benefit cost analyses revealed that foliar spray of compost tea showed highest BCR (65.20) followed by T8 (Soil application of IPM Lab Biopesticide) with BCR 54.38 in case of potato while the highest BCR (28.32) was calculated in plots received compost tea as soil drenching followed by T 9 (BAU-Biofungicide as foliar spray) in case of tomato. The other treatments showed comparatively higher BCR as compared to untreated control in both vegetables. The results indicated that an investment of Tk. 1.00 may lead to a profit up to Tk. 65.20 by foliar application of compost tea in potato and may lead to a profit of Tk. 28.32 with soil drenching of compost tea in tomato which are maximum profit in the present study.