The life cycle of Lymantria mathura subpallida Okano and it’s susceptibility to LyxyNPV
Date Issued
2004
Date
2004
Author(s)
Chen, Ying-Yu
DOI
zh-TW
Abstract
Lymantria mathura subpallida Okano (Lymantriidae) is a native species in Taiwan. It is not only a pest for plants and forests, but also an important quarantine pest in the world. In this study, the larvae were reared on fresh leaves of Liquidambar formosana (Hamamelidaceae) at constant temperatures under 70 ± 5 % RH, and at a photoperiod of 14:10 (L:D) rough out the experiment. The developmental periods of this moth reared at 15, 20, 25 and 30℃ were 179.32 ± 0.22, 82.88 ± 1.65, 74.22 ± 1.40 and 66.52 ± 0.12 days, respectively. At 25℃, the female moth mated 1.5-days after emergence. The life span of unmated female moth was 6.5 ± 1.2 days, the mated was 4.5 ± 0.5 days. Each female lay one egg mass containing 200-300 eggs. The female larvae consisted of eight instars while the male was only seven instars at 25℃. At 25℃, 14:10 (L:D), the L. mathura subpallida Okano had 5 ~ 6 generations per year, but no diapause was found. In preliminary test, the larvae were susceptible to LyxyNPV (Lymantria xylina nucleopolyhedrovirus, LyxyNPV), but it is needed to evaluate the potential of this moth to be a substitute host for LyxyNPV mass production. The artificial diet for gypsy moth diet and that modified by adding with the homogenized leave of Li. formosana or other additives, were used to rear newly hatched larvae. The results showed that these media were not adequate for the growth of the larvae, due to the delayed development and unhealthy problem of larvae were found. Therefore, the artificial medium for L. mathura subpallida Okano is needed to be developed in further work.
Subjects
黑角舞蛾核多角體病毒
生活史
Lymantria mathura subpallida Okano
Lymantria xyli
Type
thesis