The probing behavior and feeding activity of green peach aphid, Myzus persicae
Sulzer, on Bacillus thuringiensis ssp. tenebrionis- transgenic potatoes, insecticide
treated potatoes, and host plants with different preference were electronically
monitored. I found that first, transgenic potatoes had no effect on green peach aphid
probing suggesting that transmission of green peach aphid-borne viruses would not be
affected. Second, the probing behavior of green peach aphid was not modified by the
insecticides, aldicarb, Admire, and Di-syston. However, the postfeeding behavior of
aphids was different over time and with insecticides, which might have an influence on
virus transmission in the field. Third, the probing behavior of green peach aphid on
host plants with different preference varied. Aphids probed more when they moved
from a higher-preference host plant (radish) to a lower preference host plant (potato).
In addition, the settling rate was low when aphids were moved from higher to lower
preference host plants. This difference might affect virus transmission in the field.
Vector efficiency, relationship of virus transmission between vector and host plants,
and vector control strategies are discussed.
In addition, the probing behavior of two mosquito species, Aedes aegypti and
Anopheles stephensi, on mice was recorded electronically to examine waveform
patterns and to quantify sporozoite output. My studies indicated that sporozoite output
of malaria-infected mosquitoes was not detected by using the electronic monitoring
system. The relationship between waveform patterns and penetration activities of
mosquitoes needs clarification before further studies can be conducted. / Graduation date: 1994
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/35672 |
| Date | 08 April 1994 |
| Creators | Shieh, Jong-neng |
| Contributors | Rossignol, Philippe A. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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