Pymetrozine 50%WDG

Common

name

Pymetrozine

Chemical name

4, 5 - dihydro - 6 - methyl - 4 - (3 - pyridine methylene amino) - 1,2,4-3 (2 h) - ketone

Molecular formula

C10H11N5O

Description

1.Melting Point:217C

2.Vapour Pressure: (20C):<9.7510-8pa(C)

3.Molecular weight:217.23

4.density(20C):1.36

5.Solubility (g/L) : in water0.29(25C), ethanol 2.25(20C);

6.Stability : decomposing DT50=4.3 days in water under pH=7

conditions,decomposing DT50=25 days in water under ph=5 conditions.

7.Appearance: colorless crystals.

Toxicity

1) Oral: acute oral LD50 for rats 5820mg/kg

2) Skin and eyes: acute percutaneous LD50 for rats >2000mg/kg.

Non-irritatingto the skin and eyes (rabbits). Not a skin

sensitiser to guinea pigs.

3) Inhalation: LC50 (4h) >1800mg/m3 air

4) NOEL: (2y) for rats 3.7mg/kg b.w. daily

5) ADI: 0.03mg/kg b.w.

6) Other: non-mutagenic in 5 assay tests, including the Ames test

7) Birds: acute oral LD50 for bobwhite quails, mallard ducks >2000mg/kg.

LC50 for bobwhite quails (8d) >5200ppm

8) Fish: LC50 (96h) for rainbow trout and common carp >100mg/L

9) Daphnia: LC50 (48h) 87mg/L

10) Algae: LC50 (72h) for Scenedesmus subspicatus 47.1; LC50(5d) for

Selenastrum capricornutum 21.7mg/L

11) Bees: oral LD50 (48h) >117 (Lig/bee; contact LD50 (48h)>200ig/bee

12) Worms: LC50 (14d) for Eisenia foetlda 1098mg/kg soil

Function

a) Control of aphids and whitefly in vegetables, potatoes, ornamentals, cotton,

deciduousand citrus fruit, tobacco, hops; both juvenile and adult stages are

susceptible.Also for control of plant hoppers in rice.

b) Application rates vary from 150g/ha on potatoes to 200 - 300g/ha on ornamentals,tobacco and cotton; 10 - 30g/hl on vegetables, fruit and hops.