Fig 1.
Survival curves of aphids after transfer from cotton to leaves of cotton and cucumber (A) and from cucumber to leaves of cucumber and cotton (B).
Table 1.
Life-table parameters of aphids transferred from cotton to cotton and cucumber and from cucumber to cucumber and cotton leaves.
Fig 2.
Survival curves of aphids after transfer from winter hosts to cotton and cucumber.
(A) From hibiscus to cotton and cucumber. (B) From pomegranate to cotton and cucumber. (C) From Chinese prickly ash to cotton and cucumber. (D) From hibiscus, pomegranate and Chinese prickly ash to cotton.
Table 2.
Survival of aphids after transfer from winter hosts to cotton.
Table 3.
Life-table parameters of aphids after transfer from winter hosts to cotton.
Fig 3.
Survival curves of aphids after transfer from cotton or cucumber to winter hosts.
(A) From cotton and cucumber to hibiscus. (B) From cotton and cucumber to pomegranate. (C) From cotton and cucumber to Chinese prickly ash. (D) From cotton to hibiscus, pomegranate and Chinese prickly ash.
Table 4.
Survival of aphids after transfer from cotton to winter hosts.
Table 5.
Life-table parameters of aphids after transfer from cotton to winter hosts.
Fig 4.
Sequence alignment of the mitochondrial DNA region used as a biotype-distinguishing molecular marker in different aphid species Arrows indicate the five single-nucleotide polymorphisms between the two host-specialized biotypes of Aphis gossypii.
Different colored backgrounds (yellow, blue, and white) are used to highlight DNA sequence differences at each nucleotide position. Related aphid species and their corresponding GenBank accession numbers are as follows: Aphis glycines (KC840675.1), Cervaphis quercus (KF254841.1), Melaphis rhois (AY601894.1), Pemphigus nortonii (GQ284569.1), Pemphigus populi-venae (AY182337.1), Pemphigus obesinymphae (AY182345.1), Thecabius populi-monilis (AY182348.1), Diuraphis noxia (HQ528296.1), Pterocomma pilosum (GU457827.1), Rhopalosiphum inserta (AJ315894.1), R. padi (AJ315886.1), and Schizaphis graminum (AJ315874.1).
Table 6.
Proportions of two cotton-melon aphid biotypes on winter hosts based on mitochondrial DNA sequences.
Table 7.
Proportions of two cotton-melon aphid biotypes on summer hosts based on mitochondrial DNA sequences.