神澤氏葉蟎各齡期對溫氏捕植蟎的食物價值

"Food value of various stages of Tetranychus kanzawai to Amblyseius womersleyi (Acari: Phytoseiidae, Tetranychidae)"

供應神澤氏葉蟎的不同齡期為食物，溫氏捕植蟎雌成蟎對葉蟎的卵及幼蟎期取食數量多於其他齡期，取食相似數量的前若蟎、後若蟎及雄成蟎，而對雌成蟎取食數最少。取食偏好選擇試驗顯示溫氏捕植蟎雌成蟎喜好取食葉蟎的卵及幼蟎，對若蟎及雄成蟎無選擇偏好；當其他齡期存在時，傾向於捕食其他齡期而不捕食雌成蟎。前若蟎、後若蟎及雄成蟎的重量相近。取食若蟎時溫氏捕植蟎的產卵量顯著低於取食葉蟎的其他齡期時。比較溫氏捕植蟎每產一粒卵所需捕食的葉蟎各齡期的重量，葉蟎卵及雌成蟎的食物價值最高，幼蟎及雄成蟎居次，若蟎期最低。在管理葉蟎族群評估捕植蟎的抑制力時，可以葉蟎的各齡期換算為以卵為基準的數值，而獲得對葉蟎：捕植蟎比率較精確的計算。根據溫氏捕植蟎每產一粒卵所需捕食的葉蟎各齡期的量，神澤氏葉蟎的幼蟎、前若蟎、後若蟎、雄成蟎、雌成蟎各相當於1.05、1.37、1.38、1.87、10.99粒卵。

"Solely offered various stages of the spider mite, Tetranychus kanzawai Kishida, adult female phytoseiid mites, Amblyseius womersleyi Schicha, consumed more spider mite eggs and larvae, similar numbers of protonymphs, deutonymphs, and adult males, and fewer adult females. Feeding choices revealed that A. womersleyi favored eggs and larvae of T. kanzawai, had no predilection among T. kanzawai nymphal stages and adult males, and tended not to feed on adult females of T. kanzawai when there were other prey stages available. Weights of protonymphs, deutonymphs, and adult males of T. kanzawai were similar to each other. While feeding on spider mite nymphs, A. womersleyi laid significantly fewer eggs than while feeding on other stages of the spider mite. The quantity, in micrograms（μg）, of spider mites consumed for each phytoseiid egg laid showed that spider mite eggs and adult females had the highest food value, followed by larvae and adult males, while the 2 nymphal stages had the lowest food value. In order to better estimate the spider mite: phytoseiid ratio for managing spider mite populations, numbers of larvae, protonymphs, deutonymphs, adult males, and adult females of the spider mite were suggested to be unified using spider mite eggs as the standard. As determined by the amount consumed to produce 1 A. womersleyi egg, each T. kanzawai larva was equivalent to 1.05 eggs, each protonymph to 1.37 eggs, each deutonymph to 1.38 eggs, each adult male to 1.87 eggs, and each adult female to 10.99 eggs."