Systemic action of novel neonicotinoid insecticide IPP-10 and its effect on the feeding behaviour of Rhopalosiphum padi on wheat.
BACKGROUND
IPP-10 is a novel neonicotinoid insecticide recently developed in China and has good activity against sucking insects. Studies were carried out to investigate the activity of IPP-10 against Rhopalosiphum padi L.


RESULTS
The results demonstrated that IPP-10 had both contact and systemic activity, including acropetal and basipetal translocation in wheat vascular bundles. Starved R. padi were allowed to stay on wheat treated with a sublethal dose of IPP-10. The results of studying their feeding behaviour from an electrical penetration graph (EPG) revealed a decrease in total time and bout duration of xylem and phloem ingestion, but the total time and bout duration of phloem salivation were significantly prolonged. The frequency (7.03 +/- 0.49 Hz) of the xylem ingestion waveform produced by aphids on wheat treated with IPP-10 was significantly lower than that of blank control aphids (8.20 +/- 0.30 Hz). Consequently, aphids born on wheat treated with IPP-10 were obviously lighter and less fecund than the control aphids.


CONCLUSIONS
These tests indicated that IPP-10 had both contact and systemic activity, with sublethal effects resulting in reduction in R. padi feeding behaviour, growth rate and fecundity.
Cui
Li
L
Key Laboratory of Pesticide Chemistry and Application Technology, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Sun
Lina
L
Shao
Xusheng
X
Cao
Yazhong
Y
Yang
Daibin
D
Li
Zhong
Z
Yuan
Huizhu
H
D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D053961:Azabicyclo Compounds / Q000378:metabolism / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D005247:Feeding Behavior / Q000187:drug effects*; D005298:Fertility / Q000187:drug effects; D007306:Insecticides / Q000378:metabolism / Q000633:toxicity*; D011725:Pyridines / Q000378:metabolism / Q000633:toxicity*; D014908:Triticum
C555339:1-(6-chloro-3-pyridylmethyl)-7-methyl-8-nitro-1,2,3,5,6,7-hexahydroimidazo(1,2-a)pyridin-5-ol; D053961:Azabicyclo Compounds; D007306:Insecticides; D011725:Pyridines