OAR@ICRISATTechnique to Screen Peanuts for Resistance to the Tobacco Armyworm, Spodoptera litura (Lepidoptera: Noctuidae) Under No-Choice Cage ConditionsH CSharmaauthorGPampapathyauthorRKumarauthorPeanut is an important oilseed crop in the semi-arid tropics. It is damaged by several insect species, of which tobacco armyworm, Spodoptera litura F., is one of the most damaging pests in South and Southeast Asia. Because of uncertainty of S. litura infestations under field conditions, we standardized a no-choice cage technique to screen germplasm and breeding material for resistance to this insect. The test plants were infested with different densities of first- and third-instar larvae at 15 d after seedling emergence. Maximum differences in leaf damage rating and percentage loss in plant biomass at 7 d after infestation between JL 24 and ICGV 86031 were observed when the plants were infested with 10 first-instar larvae per plant. When the plants were infested with third-instar larvae, damage evaluation at 48 hr after infestation showed the maximum differences between JL 24 and ICGV 86031. Larval weight was significantly lower on ICGV 86031 as compared to JL 24 at 10,15, and 20 larvae per plant. At 10 larvae per plant, ICGV 86031, GP-NC 343, and TMV 2 suffered less damage than JL 24. Larval weights in general were lower on FDRS 10 (except at 20 larvae per plant) and ICGV 86031 than on JL 24. Leaf damage rating was significantly and positively correlated with larval weight and loss in plant biomass. Fifteen-d-old peanut seedlings infested with 10 first- or third-instar larvae can be used to evaluate peanut germplasm and segregating breeding material for resistance to leaf defoliators such as S. litura.GroundnutAgriculture-Farming, Production, Technology, Economics2002American Peanut Research and Education SocietyArticle

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant OAR@ICRISAT the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that OAR@ICRISAT does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at OAR@ICRISAT) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.