1Hawassa University, College of Agriculture, Awassa, Ethiopia
Mekelle University, College of Dryland Agriculture and Natural Resource Management, Mekelle, Ethiopia
*Email: amlshamezgebe@yahoo.com (corresponding author)
Online published on 24 September, 2020.
Effect of nitrogen fertilizers on total glucosinolate concentration of Ethiopian mustard Brassica carinata plants and cabbage aphid Brevicoryne brassicae L. was studied under greenhouse condition. Nitrogenous fertilizers’ application was observed positively correlated with total nitrogen, protein and sugar content of B. carinata but negatively with leaf phosphorus and total glucosinolate contents. Aphids that fed on plants treated with highest nitrogen rate (150%) had shorter prereproduction, and longer reproduction periods with more longevity. Thus, increase in nitrogen led to intrinsic rate of increase, with a greater number of nymphs, apterous and alate adults.
Brassica carinata, Brevicoryne brassicae, Nitrogen fertilizers, Correlation, Glucosinolate, Leaf phosphorus, Protein, Sugar, Intrinsic rate of increase, Population size
