The ecological fitness of the tomato potato psyllid after transferring from non-crop host plants to tomato and potato.

An insect's fitness varies on different host plant species, and can be affected by previous host feeding experience. In New Zealand, Bactericera cockerelli (the tomato potato psyllid (TPP)) overwinter on various host species, and later migrate to annually grown crop host plants. How changing host plant species affects the insect's fitness is unknown.

The ability of the green peach aphid () to penetrate mesh crop covers used to protect potato crops against tomato potato psyllid ().

In Central and North America, Australia and New Zealand, potato () crops are attacked by , the tomato potato psyllid (TPP). 'Mesh crop covers' which are used in Europe and Israel to protect crops from insect pests, have been used experimentally in New Zealand for TPP control. While the covers have been effective for TPP management, the green peach aphid (GPA, ) has been found in large numbers under the mesh crop covers.