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RISS 인기검색어
- 검색키워드
- 저자 : Kandaswamy Kalaivani (검색결과 2 건)
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Senthil-Nathan, Sengottayan,Kalaivani, Kandaswamy,Choi, Man-Young,Paik, Chae-Hoon Elsevier 2009 Pesticide biochemistry and physiology Vol.95 No.2
<P><B>Abstract</B></P><P>It has been established that jasmonate and its pure derivative, Jasmonic Acid can induce the emission of volatiles similar to those induced by herbivory which fed on the plant. Although the effects of induced resistance on chewing insects have been extensively studied, relatively little is known about their potential effects on phloem-feeding insects such as brown planthoppers. We studied the pattern of within-plant preference in the brown planthopper, <I>Nilaparvata lugens</I> (Stål) (BPH) (Homoptera: Delphacidae) and its consequences for offspring performance on the host-plant <I>Oryza sativa</I> L. (Taebaegbyeo variety) regarding the role of induced resistance of rice plants to hopper feeding. The present study examined the effects of induced resistance on the feeding (food assimilation and digestion), development, egg hatchability and survival. In this study, induced resistance was activated in rice using a foliar application of synthetic jasmonic acid (JA) (low 2.5mM and high 5mM). Induced resistance significantly reduced the longevity and egg hatchability of the adult <I>N. lugens</I>, as well as the percentage of nymphs surviving to maturity (only at high dose). This study also observed <I>N. lugens</I> food utilization, in order to evaluate the potential influence of induced resistance on <I>N. lugens</I> feeding behavior. The quantity of food ingested and assimilated by <I>N. lugens</I> on JA treated rice plants was significantly affected at the high dose of JA. These results indicate that JA application induces systemic defenses in rice that have a direct negative impact on <I>N. lugens</I> survivorship. At high concentration (5mM) several abnormalities possibly related to defective moulting, were observed along with malformed eggs. These findings expand our knowledge the effects of JA-dependent defenses on phloem-feeding insects.</P>
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Edward-Sam Edwin,Prabhakaran Vasantha-Srinivasan,Athirstam Ponsankar,Annamalai Thanigaivel,Selvaraj Selin-Rani,RichardW.Mankin,Sengottayan Senthil-Nathan,Kandaswamy Kalaivani,Ramasamy Kanagaraj Murali 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.4
Trichogramma species are used worldwide as biological control agents. A particularly important application is mass-rearing and release formanagement of field-crop and warehouse insect pests. Eggs of commonly available hosts, Spodoptera litura, Corcyra cephalonica, Plutella xylostella and Helicoverpa armigera, were exposed to different temperature and nonionizing ultraviolet (UV) radiation treatments to consider whether particular combinations of treatments positively affected T. chilonis development. The treatments had different effects on three measures of parasitoid production: the rate of parasitization, adult emergence, and adult viability. At constant temperature (24, 28, 32 °C), the mean percentage of egg parasitization was greatest on treatments of S. litura eggs. However, the mean percentage of adult emergence was significantly greater from C. cephalonica eggs at 28 °C than from eggs in other treatments. The mean percentage of adult viability was found to be 83.9% from C. cephalonica eggs at 28 °C. Ultraviolet radiation treatments (3, 6, or 9 min at 254 nm) significantly increased the mean percentage parasitization over that of the non-UV treatments. Also, the mean percentage of adult parasitoid emergence and viability were greater fromC. cephalonica eggs exposed to non-ionizing UV radiation than from eggs of other hosts in all other treatments. This information can be used bymanagers of mass-rearing programs to increase the effectiveness of T. chilonis production for biological control of pest insects.
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