Induced resistance to the common cutworm, Spodoptera litura (Lepidoptera: Noctuidae) in three soybean cultivars

Abstract

We investigated induced resistance to the common cutworm, Spodoptera litura, in three soybean cultivars, 'Bay', 'Fukuyutaka', and 'Himeshirazu'. Levels of induced resistance caused by S. litura herbivory varied among the cultivars. High induced resistance was found in 'Bay', with less food consumption by larvae (78.2%), less larval weight gain (67.3%), longer larval duration (114.2%), and lighter pupal weight (79.7%) than on uninjured plants (100%). The same trends were observed in larvae feeding on leaves of previously damaged plants of 'Fukuyutaka', which is susceptible to S. litura, but only larval duration was significantly prolonged (107.3%). No apparent effect of previous herbivory on plants was found in 'Himeshirazu', which is constitutively resistant to S. litura. Prior mechanical injury to leaves of 'Bay' also decreased subsequent food consumption by larvae (82.9%), but had little effect on larval growth.

Host Plant Resistance in Cultivated Jute and Its Wild Relatives Towards Jute Hairy CaterpillarSpilosoma obliqua(Lepidoptera: Arctiidae)

“…The growth rates of S. obliqua had a significantly positive correlation with protein content. Similar results were obtained with different insectplant systems by several researchers (Endo et al 2007;Constabel & Barbehenn 2008;Bosch et al 2014).…”

Applications of different silica's on the plant insect pests Epilachna vigintioctopunctata und Spodoptera litura F.

“…aber auch schon auf Pflanzen der Familie Cucurbitacea nachgewiesen (Schäfer 1983;Shirai und Morimoto 1997). Der Quarantäneschädling S. litura ist einer der bedeutendsten Schädlinge an der Sojabohne (Glycine max L.) (Endo et al 2007 (Mewis und Reichmuth 1999;Mewis und Ulrichs 1999;Fields 2000;Prasantha 2003;Mewis und Ulrichs 2001;Ulrichs und Mewis 2005), bieten sie eine echte Alternative zum Einsatz synthetischer Insektizide (Erb-Brinkmann 2000). DE liegen vorwiegend in amorpher Form vor und enthalten nur sehr geringe Anteile an kristallinem Siliziumoxid.…”

Integrasi Varietas Tahan dan Bioinsektisida untuk Pengendalian Ulat Perusak Daun Kedelai

“…Dilaporkan bahwa ulat grayak yang diberi pakan daun galur kedelai tahan ulat grayak PI 17144 dan PI 227687 meningkatkan kematian ulat, bobot ulat dan pupa rendah, dan perkembangan ulat lebih lama. Endo et al (2007) mengemukakan varietas tahan berpengaruh buruk terhadap biologi serangga, laju kematian tinggi pada sebagian atau seluruh stadia perkembangan serangga, seperti penurunan bobot ulat, bobot kepompong, dan perkembangan yang tidak sempurna.…”