Comparative study of the application of jasmonic acid and pesticide in chilli: effects on physiological activities, yield and viruses control

Abstract

ABSTRACT:The excessive application of pesticides for agricultural production has raised quite some concern about environmental safety and sustainability. To reduce environmental impact of pesticide overuse, there is an increasing interest in using different elicitors including Jasmonic acid (JA) to induce resistance against pathogen and insect in crop. Chilli (Capsicum annuum L.), which is an important vegeTable cum spice crop around the world. The aims of this study were to compare the effectiveness of Jasmonic acid on growth, Phyto-physiological responses, yield and viruses control in chilli plant. It was evaluated the effectiveness of single spray of JA (JA1), double spray of JA (JA2), conventional pesticide (Malathion 50%) and without any of those or control. The experimental results showed that pesticide-treated plants perform much better at early growth stages and become less competitive to JA2 treatment at maturity. Double spray of jasmonic acid showed less stress symptoms in different antioxidant enzymes activities (GPX, APX and CAT), reduce percentage of disease incidence and severity as well as improve growth and yielding characters of chilli plant. Therefore application of Jasmonic acid in chilli could be a possible alternative of pesticide application and its two times exogenous spray (0.5mM) is most effective.

Potential of kaffir lime (<em>Citrus hystrix</em>) leaf extract as biopesticide in improving pre and post-harvest quality of chili (<em>Capsicum annuum</em>)

“…Results from this study is aligned with Awang et al (2015) showing that treated chilli plants with pesticides had a better growth performance and yield if compared to untreated plants.…”

Silicon and methyl jasmonate in the vegetative development and genetic stability of rice

“…Several studies have been conducted on the contribution of exogenously applied methyl jasmonate to the morphological/physiological characteristics of crops, including pepper Capsicum annuum L. (Awang et al, 2015), rice (Hsu, Chao, & Kao, 2013), and wheat (Anjum et al, 2016). However, in the present study, behavioral discrepancies were found since methyl jasmonate did not provide an increase in these characteristics when observed alone.…”

“…Jasmonates are also involved in several vegetative growth and development processes, such as the increase of fruit size and mass (Martínez-Esplá et al, 2014), chlorophyll pigment concentration, and the development of the root system (Awang, Ismail, Omar, & Islam, 2015). A recent study has shown the interaction between methyl jasmonate and silicon in rice but only concerning the effects of plant defense against insects.…”

Genetic diversity analysis of selected Capsicum annuum genotypes based on morphophysiological, yield characteristics and their biochemical properties

“…In previous research, capsaicinoid content in chili pepper was identified using organoleptic methods and spectrophotometry . A substantial improvement was introduced by using thin‐layer chromatography (TLC), gas–liquid chromatography (GC) and HPLC . In contrast to GC and TLC, HPLC enables the separation of non‐volatile compounds, that does not involve exposure to air or heat and has good sample recovery.…”