Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Systemicity of topical afidopyropen application against cotton aphids on cucumber.
| Systemicity | Leaf observed | Numbers of aphids | % Control | |
|---|---|---|---|---|
| Treated pot | Untreated pot | |||
| Upward | 2nd true leaf | 1 | 162 | 99.4 |
| 1st true leaf* | 7 | 225 | 96.9 | |
| Downward | 2nd true leaf* | 20 | 369 | 94.6 |
| 1st true leaf | 136 | 343 | 60.3 | |
*Treated leaves.
At 4 days after treatment of only the 1st or 2nd true leaf with 1,000 ppm afidopyropen, adult cotton aphids were placed on cucumber plants. After 8 d, the numbers of aphids were counted.
