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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 71, No. 3, 2011, pp. 390-394
Bioline Code: cj11047
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 71, No. 3, 2011, pp. 390-394

 en POPULATION GROWTH OF Rhopalosiphum padi check for this species in other resources L. (HOMOPTERA: APHIDIDAE) ON DIFFERENT CEREAL CROPS FROM THE SEMIARID PAMPAS OF ARGENTINA UNDER LABORATORY CONDITIONS
Descamps, Lilian R. & Chopa, Carolina Sánchez

Abstract

The bird cherry-oat aphid Rhopalosiphum padi check for this species in other resources L. (Homoptera: Aphididae) is one of the main pests in a number of crops in the semiarid Pampas of Argentina. In the present study, the effect of different host plants, including Triticum aestivum check for this species in other resources L., Χ Triticosecale Wittm., Hordeum vulgare check for this species in other resources L., Hordeum distichum check for this species in other resources L., Avena sativa check for this species in other resources L., and Secale cereale check for this species in other resources L. on biological parameters of R. padi L. was studied in the laboratory at 24 ± 1 °C, 65 ± 10% RH and a 14:10 photoperiod. Longevity, intrinsic rate of natural increase (rm), net reproductive rate (R0), mean generation time (T), doubling time (DT), and finite rate of increase (λ) of the bird cherry-oat aphid on the different cereal crops were estimated. Differences in fertility life table parameters of R. padi among host plants were analyzed using pseudo-values, which were produced by Jackknife re-sampling. Results indicated that beer barley might be the most suitable food for R. padi due to greater adult longevity (20.88 d), higher fecundity (41 nymphs female-1), higher intrinsic rate of natural increase (0.309 females female-1 d-1), lower doubling time (2.24), and lower nymphal mortality (22.2%). Therefore, it can be concluded from the present study that R. padi prefers beer barley for fast and healthy development over other cereal crops.

Keywords
Intrinsic rate, life span, bird cherry-oat aphid, winter crops

 
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