English

Noor Asma’A Awang,Dzolkhifli Omar,Mohd Razi Ismail,M Robiul Islam

doi:10.14393/bj-v31n3a2015-22754

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.

Highlights

The chilli (Capsicum annuum L.) belongs to the family Solanaceae is one of the most important vegeTable as well as spice crops around the world, valued for its aroma, taste, flavor and pungency
Chilli is infested by more than 21 insects and non-insect pests and leaf curl disease and chilli veinal mottle virus (CVMV) are most common in Malaysia (SHIH et al, 2006; AROGUNDADE et al, 2012), and some herbivores insect such as aphid, thrips and mites are considered as the most devastating pests are act as a vector for the transport of plant viruses (THALER et al, 1996)
Disease severity and disease incidence Virus infection severity (DS) indices were higher in jasmonic acid treated plants at early growth stages (Vegetative and flowering) compared to pesticide treatment and almost similar at fruiting stage. (Figure 1, A)

Summary

Introduction

The chilli (Capsicum annuum L.) belongs to the family Solanaceae is one of the most important vegeTable as well as spice crops around the world, valued for its aroma, taste, flavor and pungency. Besides traditional uses, it is being used in pharmaceuticals, cosmetics and beverages (TIWARY et al, 2005). In Malaysia, total chilli production reached about 32.8 thousand tons per year in 2010 with about 2.8 thousand hectares of areas under cultivation (DOA, 2011). The total consumption of the country reached up to 50 thousand tons per year. The average chilli productivity in Malaysia is very low compared to that in other neighboring countries. Chilli is infested by more than 21 insects and non-insect pests and leaf curl disease and chilli veinal mottle virus (CVMV) are most common in Malaysia (SHIH et al, 2006; AROGUNDADE et al, 2012), and some herbivores insect such as aphid, thrips and mites are considered as the most devastating pests are act as a vector for the transport of plant viruses (THALER et al, 1996)

Objectives

Methods

Results

Conclusion