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Tomato/Potato Psyllid (TPP) monitoring report - 19 March 2010
2010-03-19
Two types of monitoring can be carried out. Placement of yellow sticky traps indicate when adults are prevalent in the area, but not enough is yet known to establish control thresholds. The other options is inspecting plants (particularly the lower 1/3 of stems and leaves) which gives valuable information on the numbers and life stages present in the crop, and can be used to direct to types of control products to be used.
It is also useful to monitor (or preferably remove) alternative hosts which include the common weeds dandelion, amaranth, convolulus, jimson weed, mallow, and black nightshade. Ornamental solanaceous plants are also potential hosts, and so is the native plant poroporo.
Psyllid monitoring is now being carried out at sites across New Zealand as part of the Sustainable Psyllid Management SFF project. This data, along with the latest information on psyllid monitoring, is presented below.