2005-11-25 11:16:46
Classmates had raised silkworm, everybody always should pluck Sang Xie will to it eat, why does silkworm love to eat Sang Xie most?
This wants the account from the history for, be apart from about today １ . 80 thousand years before, the earth the plant that gets on a kind to had had mulberry. Mulberry is the earliest it is growth semi-tropical area, it is evergreen, reach temperate zone area later, just turn deciduous leaf into floral slowly. Mulberry is lofty tall big, leaf grows big flourish, a lot of insect parasitism live in the look unfamiliar on it, silkworm eats a kind of insect of mulberry leaf namely.
Silkworm must not eat Sang Xie certainly natively, so far, the leave that silkworm can take does not issue 20 kinds, if Xun Xie of leaf of dandelion, elm, lettuce leaf, Wo is waited a moment, but what silkworm loves to eat most still is Sang Xie, because silkworm is foliaceous time with Sang Xie,this is the longest, breed of generation generation ground is on mulberry, formed gradually most the character that is used to eating Sang Xie, also became transmissibility.
Eat Sang Xie to study why silkworm loves most, the scientist ever had done a test, do Sang Xie through high temperature after heat up in a steamer, get one kind has volatile, send out piece very the oily material that resembles pennyroyal odour, drip it on paper, in 30 centimeters the silkworm beyond smells after this kind of odour, climb over immediately. Seeing this kind of odour is day of the most familiar information.
Silkworm is to rely on its smell and gustatory organ to discern of mulberry leaf odour, if destroyed these smell and gustatory apparatus, it cannot identify Sang Xie's odour, take some of other floral leave casually so it also can live.
