Loss Assessment of Stored Rice Infested by Sitotroga cerealella(OLIVIER)(Lepidoptera : Gelechiidae)

Access this Article

Search this Article

Author(s)

    • IMURA Osamu
    • Stored Product Entomology Laboratory, National Food Research Institute:(Present address)Division of Entomology, National Institute of Agro-Environmental Sciences

Abstract

Stored brown and rough rice of 2 high-yield cultivars, Shinpo-38 (Japonica type, S-38) and Nankin 11 (Indica type, N-11), were artificially infested with Sitotroga cerealella (OLIVIER). Losses were assessed for 13 weeks at 28°C and 70% R.H. by measuring 6 or 7 loss criteria.The criteria were adult insect number, moisture content of rice, germinability, % kernels stained by the TZ method, fat acidity value (FAV), weight of 1, 000 kernels (TGM) and weight of 200-ml volume of kernels (SVW). N-11 cultivar had a thicker and more intact husk than S-38 cultivar. The moth population grew most in the rough rice of S-38 and least in that of N-11. Moisture content and FAV were not sensitive indicators of deterioration losses in the infested rice. Germinability and the TZ test effectively indicated a decline in seed quality due to infestation treatment and aging. In comparison to non-infested controls, TGM decreased by 14.3, 12.4, 6.7 and 7.5% in S-38 rough and brown rice and N-11 rough and brown rice, respectively, over 13 weeks. SVW showed slightly lower loss estimates than TGM. The loss assessment by these criteria indicated resistance of N-11 rough rice to S.cerealella. The properties of the loss criteria are discussed.

Journal

  • Applied Entomology and Zoology

    Applied Entomology and Zoology 25(2), 239-249, 1990

    Japanese Society of Applied Entomology and Zoology

Codes

  • NII Article ID (NAID)
    110001104407
  • NII NACSIS-CAT ID (NCID)
    AA00543238
  • Text Lang
    ENG
  • ISSN
    0003-6862
  • Data Source
    NII-ELS  J-STAGE 
Page Top