ワタアブラムシによるジャガイモYウイルスの伝播

Abstract

In his former report the author concluded that cucumber aphids, Aphis gossypii GLOVER migh be indifferent to the transmission of potato virus Y.The transmission experiment in this case was rather complicated and was tried to transfer the insects from mechanically infected Solanum nigrum to that of the healthy. And then, the latter was tested whether it was infected or not by the use of Nicotiana sylvesfris as an indicator plant. In the present study the transmission experiment of the virus was carried out using N. sylvestris both as the diseased and the test plants. Before rearing the insects on the diseased and on the test plants, the leaves were gently rubbed with heated spatula to wither the hairs of the leaves.The acquisition feeding of the insect on the diseased leaf was 1 to 10 minutes and the infection feeding on the test plant was 20 to 60 minutes. The results given in Table 1 showed that Aphis gossypii was capable to transmit potato virus Y from diseased N. sylvestris to the healthy especially in the warm season. The transmission experiment of potato virus Y from diseased N. sylvestris to potato that had affected only with potato virus X with the use of Aphis gossypii as the vector was also carried out with success as shown in Figure 1.