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Abstract Detail



Physiological Section

Mukhtar, Fatimah Batul [1], Audi, Auwalu H. [2].

Utilization of Salicylic Acid for the Control of Pod Sucking Bug, Clavigralla tomentosicollis Stal. (Hemiptera: Coreidae) in Four Pre-hardened Cowpea cultivars.

The experiment was conducted at the Faculty of Agriculture Research farm, Bayero University Kano (11°58‘N, 8°25’E and 457m above sea level) from September-November, 2014 to evaluate the potential of SA-treatment in the control of Pod sucking bug. Four different cowpea varieties (IT97K-1069-6, IT98K-205-8, IT89KD-288 and Dan’ila) pre-hardened with Salicylic acid were established in various replicated field cages in completely randomized design. Five-pairs each of fresh pre-mated bugs were introduced into the various cages. These were allowed for 2-weeks to mate and oviposit after which all adult insects are removed. The different cowpea varieties screened showed variable response to the bug attack. Cowpea varieties IT97K-1069-6 and IT89KD-288 recorded low indices of susceptibility and damage to pod bug attack, delayed development time with few progeny emergence. Pre-treatment effects also varied significantly among the hormone concentrations (P<0.001) with 10ppm Salicylic acid (SA) being more effective in reducing bug population than the lower (5ppm) concentrations and the controls. The interaction of treatments and varieties was also found significant (P<0.001). Of the four Cowpea varieties screened, IT97K-1069-6 and IT89KD-288 pre-hardened with high (10ppm) concentration of salicylic acid were found tolerant having low percentage pod damages (23.56% and 12.05%) respectively while Dan’ila and IT89KD-288 treated from same concentration were susceptible having higher percentage damage levels (78.90% and 67.22%) respectively. Mechanisms of resistance utilized by these crop plants were mainly antibiosis and tolerance. Phytochemical screening of the treatments using gas chromatography mass spectroscopy (GC-MS) analysis revealed variable concentrations of cumene, eugenol, sesquiterpenes and palmitic acid. These relations should be explored extensively toward sustainable crop protection.


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1 - Bayero University, Department Of Biological Sciences, P.M.B. 3011, Kano, N/A, Nigeria
2 - Bayero University, Kano, Biological Sciences, Kano, Kano, P.M.B.3011, Nigeria

Keywords:
cowpea varieties
salicylic acid
pod sucking bug
phytochemicals.

Presentation Type: Oral Paper:Papers for Sections
Session: 53
Location: Salon 16/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 4:15 PM
Number: 53009
Abstract ID:329
Candidate for Awards:None

Canceled

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