Reference Report for GUA85008281
| Title: | Reductions in consumption, utilization, and growth rate of soybean looper (Lepidoptera: Noctuidae) larvae fed foliage of soybean genotype PI 227687. |
| Authors: | Reynolds, G.W., Smith, C.M., Kester, K.M. |
| Source: | J. Econ. Entomol. 1984, 77(6):1371-1375 |
| Abstract: | Larvae of Pseudoplusia includens reared on the resistant soyabean plant introduction PI 227687 in laboratory studies in the USA exhibited reduced growth and high mortality when compared to those reared on the susceptible cultivar Davis. These effects were most pronounced in the last instar and resulted from an acute action in this instar. The plant genotype consumed during instars 1-4 had no effect on the maximum larval weight attained, pupal weight or total mortality during larval development but did affect the duration of larval development. Measurement of food consumption and utilization by larvae fed on the foliage of PI 227687 or Davis indicated that reduced growth on PI 227687 was primarily due to feeding deterrence or the lack of feeding stimulation. A lower efficiency of conversion of digested food to body tissue, not attributable to reduced consumption, also contributed to the reduced growth rate on PI 227687. |
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