| Autor: |
Degenhardt, David C., Greene, Jeremy K., Khalilian, Ahmad, Reeves, Richard B. |
| Zdroj: |
Proceedings of the Beltwide Cotton Conferences: Cotton Insect Research & Control Conference; Jan2009, p1111-1116, 6p |
| Abstrakt: |
Phytophagous stink bugs are a major pest in B.t. cotton varieties. These bugs feed directly on cotton bolls and cause damage to the fiber resulting in millions of dollars in crop losses annually. Current assessment practices are problematic and there is a need for a more efficient and cost effective method of detection and control of these pests. It is well known plants produce odorous volatile chemicals in response to pest damage. There is potential for a rapid in-field assessment of pest damage using electronic nose technology to detect stink bug induced volatile emissions from cotton bolls. Volatile emissions from stink bug damaged and undamaged bolls were collected and analyzed by gas chromatography, as well as a novel method using a portable electronic nose. Damage by stink bugs induced significantly greater emission of terpenes compared to undamaged controls. Patterns in terpene emissions in response to damage were similar among cotton varieties, and herbivores observed. An Electronic nose was able to discriminate between damaged and undamaged cotton bolls, but not between herbivore species. This technology shows promise for developing a rapid in-field detection system based on odorous chemicals released from damaged bolls. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
