榆全爪螨分布广泛。为落叶果树,尤以属于蔷薇科的重要害虫(van de vrie等,1972;Ehara,1973)。它的亲缘种柑桔全爪螨(Ehara,1984)同样广泛分布并为害多种植物。这两个种都有一些共同的宿主植物如日本梨树和桃树(Shinkaji,1961a)。而不属...榆全爪螨分布广泛。为落叶果树,尤以属于蔷薇科的重要害虫(van de vrie等,1972;Ehara,1973)。它的亲缘种柑桔全爪螨(Ehara,1984)同样广泛分布并为害多种植物。这两个种都有一些共同的宿主植物如日本梨树和桃树(Shinkaji,1961a)。而不属蔷薇科的桑树、三叶柑桔、萨摩柑桔和菜豆都是柑桔全爪螨的宿主植物(Ehara,1956 3 Shinkaji,展开更多
Because the male silkworm is economically superior to the female in sericulture,male-silkworm rearing through sex control is an interesting question. In order to rearmale silkworms only, a balanced lethal system was e...Because the male silkworm is economically superior to the female in sericulture,male-silkworm rearing through sex control is an interesting question. In order to rearmale silkworms only, a balanced lethal system was established in Japan and former U.S.S.R.by utilizing the recessive female sex-linked gene. Tajima et al. eliminated femaleindividuals by means of mechanical or manual methods according to the sex-limitedegg color or sex-limited larva marking. In addition, Xu An-ying et al. tried to ob-tain only male individuals by inducing androgenesis. However, the above methodscannot yet be utilized in sericulture production because of their harmful influenceson the vitality of silkworm larvas or the hatching rate.展开更多
文摘榆全爪螨分布广泛。为落叶果树,尤以属于蔷薇科的重要害虫(van de vrie等,1972;Ehara,1973)。它的亲缘种柑桔全爪螨(Ehara,1984)同样广泛分布并为害多种植物。这两个种都有一些共同的宿主植物如日本梨树和桃树(Shinkaji,1961a)。而不属蔷薇科的桑树、三叶柑桔、萨摩柑桔和菜豆都是柑桔全爪螨的宿主植物(Ehara,1956 3 Shinkaji,
基金Natural Science Foundation of Guangdong Province, China.
文摘Because the male silkworm is economically superior to the female in sericulture,male-silkworm rearing through sex control is an interesting question. In order to rearmale silkworms only, a balanced lethal system was established in Japan and former U.S.S.R.by utilizing the recessive female sex-linked gene. Tajima et al. eliminated femaleindividuals by means of mechanical or manual methods according to the sex-limitedegg color or sex-limited larva marking. In addition, Xu An-ying et al. tried to ob-tain only male individuals by inducing androgenesis. However, the above methodscannot yet be utilized in sericulture production because of their harmful influenceson the vitality of silkworm larvas or the hatching rate.
