Garuda - Garba Rujukan Digital

Determination of optimum rate and spray frequency of Indoxacarb insecticide for the management of Chickpea bollworm (Helicoverpa armigera) in Eastern Amhara, Ethiopia Kassaw, Admasie; Mihretie, Aderajew; Tiruneh, Abiye; Mohamed, Awol
International Journal on Food, Agriculture and Natural Resources Vol 6, No 3 (2025): Ij-FANRes
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i3.546

Bollworm is the major insect pest of Chickpea in Ethiopia. Field experiment was conducted at Sirinka and Cheffa research sites during 2022 main growing season to determine the appropriate rate and spraying frequency of Indoxacarb insecticide and select cost-effective management options of bollworm. A randomized complete block design was implemented with three replications. The combination of three rates and three spraying frequencies of indoxacarb insecticide and unsprayed treatments was evaluated. The lowest (0.27 and 0.03) mean larva number were scored from plots treated 0.75 L with three times spraying frequency at Sirinka and Cheffa respectively. The lowest (1606 and 1269 kg ha-1) chickpea seed yield was found from untreated control plots. Similarly, the highest (2956 and 2835 kg ha-1) seed yield was obtained from plots treated with 0.75 L rates with two and three times spraying frequencies at Sirinka and Cheffa respectively. However the highest (804.4%) marginal rate of return was obtained from plots treated 0.5 L with two times spraying. Generally, 0.5 liter with two times spraying of indoxacarb was effective in controlling bollworm and got the highest cost-benefit advantage as compared with other treatments. Therefore, it could be recommended for the management of chickpea bollworm in the study areas and similar agro-ecologies of chickpea growing areas in Ethiopia.

Assessing Inorganic Salts for Effective Management of Late Blight Disease in Potatoes Kassaw, Admasie; Desale, Tesfaye; Mihretie, Aderajew; Ayalew, Abebe
International Journal on Food, Agriculture and Natural Resources Vol 6, No 3 (2025): IJ-FANRES
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i3.564

Potato in Ethiopia is the primary tuber crop, and late blight poses a significant challenge to its production. Field experiments were carried out in Meket and Wadla during the 2018 and 2019 growing seasons to assess the use of salts in controlling late blight and its cost-effectiveness management strategies. The study included seven treatments: sodium bicarbonate, sodium benzoate, sodium carbonate, potassium chloride, calcium chloride, a systemic fungicide containing Mefenoxam and Mancozeb, and a control treatment. The treatments were settled in a randomized complete block design with three replications. The study found that there were significant variations in disease levels, potato tuber yield, and yield components among different treatments. Application of salts were found to be effective in reducing late blight disease, leading to higher yields. Among salts, the highest total tuber yield (23.59 and 22.02 t ha-1) was recorded from sodium bicarbonate at Meket and Wadla in 2019, respectively. The highest marginal rate of return (2,852%) was obtained from synthetic fungicide followed by 2,634% by sodium bicarbonate. Therefore, besides synthetic fungicide, foliar application of sodium bicarbonate can decrease potato late blight disease pressure and is advised to be considered as an alternative control measure.

Assessing Inorganic Salts for Effective Management of Late Blight Disease in Potatoes Kassaw, Admasie; Desale, Tesfaye; Mihretie, Aderajew; Ayalew, Abebe
International Journal on Food, Agriculture and Natural Resources Vol 6, No 3 (2025): Ij-FANRes
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i3.561

Potato in Ethiopia is the primary tuber crop, and late blight poses a significant challenge to its production. Field experiments were carried out in Meket and Wadla during the 2018 and 2019 growing seasons to assess the use of salts in controlling late blight and its cost-effectiveness management strategies. The study included seven treatments: sodium bicarbonate, sodium benzoate, sodium carbonate, potassium chloride, calcium chloride, a systemic fungicide containing Mefenoxam and Mancozeb, and a control treatment. The treatments were settled in a randomized complete block design with three replications. The study found that there were significant variations in disease levels, potato tuber yield, and yield components among different treatments. Application of salts were found to be effective in reducing late blight disease, leading to higher yields. Among salts, the highest total tuber yield (23.59 and 22.02 t ha-1) was recorded from sodium bicarbonate at Meket and Wadla in 2019, respectively. The highest marginal rate of return (2,852%) was obtained from synthetic fungicide followed by 2,634% by sodium bicarbonate. Therefore, besides synthetic fungicide, foliar application of sodium bicarbonate can decrease potato late blight disease pressure and is advised to be considered as an alternative control measure.

Assessment of Major Diseases and Insect Pests of Horticultural Crops in Eastern Amhara, Ethiopia Mihretie, Aderajew; Kassaw, Admasie; Gashaw, Berhan; Yimer, Desalegn; Ayalew, Abebe; Mihretie, Akalu
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.1-19

Diseases and insect pests are serious problems affecting horticultural crops grown in mid and lowland areas. A systematic survey was conducted to assess the distribution, incidence, and severity/damage levels of diseases and insect pests of horticultural crops in the mid- and lowland areas of the North and South Wollo zones (Kalu, Tehuledere, Habru, and Kobo districts) during the 2017/2018 main and irrigation seasons. During the survey, a total of 279 fields on 14 different horticultural crop types were addressed. As revealed by the assessment, horticultural crops are subjected to numerous pests. Citrus woolly whitefly (Aleurothrixus floccosus) and leaf miner (Phyllocnistis citrella) on citrus; fruit flies (Thepritidea species) on coffee; diamondback moth (Plutella xylostella) on cabbage; and thrips on onion were the most destructive insect pests in the area. Especially, woolly whitefly in Kobo and leaf miner in Kalu districts were the major pests of citrus, with severities of 38.97% and 31.84%, respectively. Regardless of location, leaf miner was the most severe pest (42.31%) at the seedling stage of citrus. whereas, anthracnose (Colletotrichum species) and powdery mildew (Oidium caricae) on mango, anthracnose on avocado, purple blotch (Alternaria porri) on onion, and black sigatoka (Pseudocercospora fijiensis) on banana were found to be the major diseases in their order of damage level and occurrence. This clearly indicates the need for regular and targeted pest monitoring on the one hand and the development of management options for the most important horticultural crop pests of the area on the other.

Title

Found 4 Documents
Search

Abstract

Abstract

Abstract

Abstract

Title Search

Found 4 Documents Search

Abstract

Abstract

Abstract

Abstract

Title

Found 4 Documents
Search