The Tobacco Pests and Disorders bulletins, published in the Plant Protection area of this website, have been recently updated. The updates incorporate new information on several pests and plant protection products that have been recently registered and are recommended for use on tobacco.
A bulletin on aphids is now available. Identified in this bulletin is a new threshold to trigger treatment for aphids. The new threshold states that treatment should be applied when at least 10% of the plants in an area have 50 or more aphids on the upper leaves. Immediate treatment, however, is recommended when aphids are detected in tobacco fields that are near potato, tomato and pepper fields, to help reduce the risk of Potato Virus Y (PVY) transmission by the aphids.
The harvester ant bulletin now specifically refers to pavement ants, which are the most common harvester ants found in muck soil greenhouses.
Included now in the bulletin on Tobacco Mosaic Virus, are specific recommendations on sanitization of greenhouse and field equipment.
Among the new registered products are Fulfill 50WG Insecticide, active ingredient (a.i.) pymetrozine, registered for aphid control in the field, which has been included in the aphid bulletin, and the fumigant Pic Plus, a.i. chloropicrin 85.1%, registered for nematode and Black Root Rot control, which has been included in the Brown Root Rot and Black Root Rot bulletins. Information on air and soil temperatures, and soil moisture requirements when the active ingredients metam sodium and chloropicrin are used, is now included in the bulletin on Brown Root Rot (caused by Root-Lesion nematode). The name for the insecticide Ripcord 400 EC, a.i. cypermethrin 407 g/L, has been changed to Mako Insecticide. Information about this is in the bulletin on cutworms, wireworms and seedcorn maggots.
Despite the fact that the product application rates are provided in these bulletins, always refer to the product label before use.
There were no changes to the recommendations for sterilization of dry and float trays. For Styrofoam trays, steam treatment of 80°C for a minimum of 1 hour needs to be applied to eliminate Black Root Rot from the trays. For muck soil seedbeds to be sterilized properly, a temperature of 82°C needs to be held for 30 minutes, at a 15 cm depth.
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Mailing Address: CTRF, P.O. Box 322, Tillsonburg, ON N4G 4H5
Telephone: 519-842-8997
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