Updated July 14, 2009 by Robert Wright
| Economic Thresholds (Purdue University) |
|||
| Number of Days Before Tasseling |
Crop Condition | Number of Aphids Per Plant |
|
|---|---|---|---|
| 21 | Normal | 15 | |
| 21 | Stressed | 10 | |
| 14 | Normal | 30 | |
| 14 | Stressed | 15 | |
| During pollen-shed, aphids may interfere with pollen-shed if they are abundant on the tassels due to their secretions of sticky honeydew. If greater than 50% of the tassels are covered with aphids and their honeydew prior to 50% completion of pollination, control may be needed. | |||
This list is not inclusive. See http://www.greenbook.net
or other resources for additional registrations.
This information is presented in abbreviated form. Be sure to consult the
label for additional information and restrictions.
R =Restricted-Use Product
Product Name |
Common Name |
Rate (Formulation/Acre) |
Restrictions/Comments | |
|---|---|---|---|---|
| Dimethoate 4EC | dimethoate | 2/3 - 1 pint | Do not apply during pollen-shed if bees are present. | |
| R | Lorsban 4E | chlorpyrifos | 1 - 2 pints | |
| Malathion 57EC | malathion | 1½ pints | ||
| R | Penncap-M | methyl parathion | 2 - 3 pints | Do not apply during pollen-shed if bees are present. |
