PJB-2024-618
INDUCED RESISTANCE AND NUTRIENT DETERRENCE COULD REDUCE APHID REPRODUCTION AND IMPROVE CROP YIELD, PHENOLIC DEFENSE AND ECONOMIC BENEFITS OF CANOLA (BRASSICA NAPUS L.) IN THE FIELD
MUHAMMAD WAJID JAVED
Abstract
Brassica aphid, Brevicoryne brassicae L., is a key pest of canola (Brassica napus L.), all over the world. A few studies have focused on its field management using inducers or nutrients; however, none of them focused on aphid reproduction indices, phenolic defense, and economic returns. Two-years field studies on induced resistance (0, 0.5, and 1 mM concentrations of SA: Salicylic Acid and CA: Citric Acid) and nutrient deterrence (25 and 50 kg ha-1 doses of Si: Silicon and AS: Ammonium Sulphate) were conducted and compared to insecticide (Carbosulfan 20 EC) and untreated controls. Although, insecticide was an effective treatment but its impacts were not long-lived. During both years, 1 mM SA reduced aphid reproduction the most, followed by 0.5 mM SA, 1 mM CA, and 0.5 mM CA. Similarly, in nutrient deterrence, Si 50 kg reduced the reproduction indices of most of aphids followed by Si 25 kg, and AS 25 kg. Seed yield was improved by 37.8% in AS 50 kg, followed by Si 50 kg (29.8%), and 1 mM SA (25.4%), over the insecticide. The performance of other treatments was intermediate. Phenolic defense chemicals were highest in Si 50 kg, followed by Si 25, AS 25 kg, and 1 mM SA. Marginal analysis followed by residual analysis revealed AS 25 kg ha-1 to be the most economical treatment followed by 0.5 mM SA for recommending to the farming community. Conclusively, both approaches showed the potential to manage brassica aphids on canola and improved crop yield and phenolic defense; however, additional research is desired to explore their possible mechanism of resistance in plants to breed pest-resistant cultivars.
To Cite this article:
Not Recommended
We Welcome Latest Research Articles In Field Of Botany The Pakistan Journal of Botany is an international journal .... Read More
