Name

pymetrozine

Synonym

More Synonyms

Description

Pymetrozine is a feeding inhibitor of Homoptera, in preventing transmission of cauliflower mosaic caulimovirus by the aphid species Myzus persicae (Sulzer).

Related Catalog

Target

Homoptera[1]

In Vivo

Pymetrozine, a fast-acting and selective inhibitor of aphid feeding. In-situ studies with electronic monitoring of feeding behaviour. Pymetrozine, a pyridine azomethine compound, represents a novel insecticide with a selective activity against homopteran insects. It acts in a unique way: aphids are not knocked down on contact but seem to die of starvation. This implies an effect of Pymetrozine on feeding behaviour. The aim of the present work is to elucidate how and at which step Pymetrozine interferes with the complex mechanisms underlying phloem feeding. The effect of Pymetrozine, applied in various ways, on different phases of stylet penetration and feeding activity of individual aphids is studied using the Electrical Penetration Graph technique (EPG). Initial choice experiments indicated that Pymetrozine does not have a deterrent or antifeedant action. Topical application (150 ng/mg fresh weight) inhibits stylet insertion into the plant. When injected, less than 30 ng/mg is sufficient to produce the same effect. When Pymetrozine is systemically applied via plant spraying or root uptake, aphids started feeding normally. After some time, however, they withdrew their stylets from the phloem and walked around with unaffected locomotion. At low doses aphids eventually recovered and resumed feeding. High doses, however, irreversibly disrupted feeding and prevented stylet reinsertion. Aphid motility is not affected up to an estimated haemolymph concentration of 1 mM Pymetrozine. Aphids which eventually stopped feeding on Pymetrozine-treated plants showed EPGs with distorted salivation/ingestion patterns[2].

References

[1]. I D BEDFORD, et al. The effect of Pymetrozine, a feeding inhibitor of Homoptera, in preventing transmission of cauliflower mosaic caulimovirus by the aphid species Myzus persicae (Sulzer). Annals of Applied Biology. 1998 Jun; 132(3): 453-462

[2]. Paul Harrewijn, et al. Pymetrozine, a Fast-Acting and Selective Inhibitor of Aphid Feeding. In-situ Studies with Electronic Monitoring of Feeding Behaviour. Pest Management Science. 1997 Feb;49(2):130-140.

Density

1.3±0.1 g/cm3

Boiling Point

401.1±37.0 °C at 760 mmHg

Melting Point

217ºC

Molecular Formula

C10H11N5O

Molecular Weight

217.227

Flash Point

196.4±26.5 °C

Exact Mass

217.096359

PSA

69.95000

LogP

-0.50

Vapour Pressure

0.0±1.0 mmHg at 25°C

Index of Refraction

1.665

Storage condition

0-6°C

Symbol

  
GHS07, GHS08

Signal Word

Warning

Hazard Statements

H332-H351-H412

Precautionary Statements

P273-P281

Personal Protective Equipment

Eyeshields;Faceshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges

Hazard Codes

Xn:Harmful;

Risk Phrases

R40;R52/53

Safety Phrases

S36/37-S61

RIDADR

NONH for all modes of transport

RTECS

XZ3018620

HS Code

2933699015