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.
Key Laboratory of Pesticide Chemistry and Application Technology, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Li
L
Cui
Lina
L
Sun
Xusheng
X
Shao
Yazhong
Y
Cao
Daibin
D
Yang
Zhong
Z
Li
Huizhu
H
Yuan
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