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Chemical Identification
Common Name
Pymetrozine
中文通用名
吡蚜酮
IUPAC
(E)-4,5-dihydro-6-methyl-4-(3-pyridylmethyleneamino)-1,2,4-triazin-3(2H)-one
CAS
4,5-dihydro-6-methyl-4-[(E)-(3-pyridinylmethylene)amino]-1,2,4-triazin-3(2H)-one
CAS No.
123312-89-0
Molecular Formula
C10H11N5O
Molecular Structure
Category
Activity
Insecticide.Pymetrozine is a systemic insecticide active against motile forms of Hemiptera, including those with MACE and esterase resistance. It has no knockdown activity but crops are protected immediately because feeding ceases soon after ingestion; this is attributed to the product disabling the pests stylet. The insects die of starvation within a few days. The product is plant-systemic. It is readily taken up by leaves and roots and translocated around the plant; it exhibits excellent translaminar activity. Novartis (now Syngenta) has also demonstrated a reduction of TYLCV transmission by B tabacii (ie reduced vectoring capability) following foliar applications of pymetrozine to tomatoes. Further studies demonstrated that pymetrozine persists in crops for up to 14 days and should offer protection against the transmission of PLRV (potato leaf roll virus).

Use of a penetrative spray additive is recommended with all applications of Fulfill. The product is rainfast as soon as it has dried.

A minimum of 7 days is required between applications of pymetrozine with a period of 14 days before harvest. Use of the formulations Endeavor and Fulfill would be restricted to no more than two applications per crop at 20 g ai/hl and 96.5 g ai/ha, respectively. The use of the formulation Chess for use on protected pepper, tomato and aubergine is restricted to no more than three per crop and the latest time of application is three days before harvest.

Tests at Rothamsted Research found that aphids showing Modified AcetylCholinEsterase (MACE) resistance survived the winter weather. MACE- resistant aphids are immune to dimethyl carbamates primicarb and triazamate. Other organophosphates and carbamates are still effective. Plenum should be a major part of aphid control programmes if growers suspect MACE resistance. There is no known resistance to Plenum with this aphid. Early action will prevent resistant colonies taking hold in the crop and help ensure subsequent applications prove effective at controlling this and other aphids. Spray programmes should give good penetration of crop canopies and cover as much of the undersides of leaves as possible.
CropUse
CropUses:
alfalfa, asparagus, aubergines, beans, brassicas, chillies, citrus, cole crops, corm vegetables, cotton, cucurbit vegetables, fruits, fruiting vegetables, hops, leafy vegetables, lettuces, mangoes, ornamentals, peaches, pears, pecans, peppers, potatoes, rice, stonefruits, tobacco, tomatoes, tuberous vegetables

Rice

100-200 g ai/ha (foliar application); 1.5 g ai/seedling box

Fruit

10-20 g ai/hl

Vegetables

10-30 g ai/hl

Cotton

100-200 g ai/ha

Hops

5-10 g ai/hl

Ornamentals

10-30 g ai/hl

Pecans

140 g ai/ha (maximum rate)

Potatoes

96.5 g ai/ha

Premix
Pymetrozine+isoprocarb
Nitenpyram+Pymetrozine
Pymetrozine+Thiamethoxam
Pymetrozine+Chlorpyrifos
Spirotetramat+Pymetrozine
Pymetrozine+Dinotefuran
Pymetrozine+Lambda-cyhalothrin
Pymetrozine+Clothianidin
Oligosaccharins+Pymetrozine
Chlorantraniliprole+Pymetrozine
Flonicamid+Pymetrozine
Indoxacarb+Pymetrozine
Pymetrozine+Methoxyfenozide
Pymetrozine+Pyriproxyfen
Pymetrozine+Pyridaben
Pymetrozine+Paichongding
Physical Properties
Molecular weight:217.2; Physical form:Colourless crystals. Density:1.36 (20 °C); Melting point:217 °C; Vapour pressure:<4 ×10-3 mPa (25 °C) ( OECD 104); Henry constant:<3.0 ×10-6 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = -0.18 ( OECD 107); Solubility:In water 0.29 g/l (pH 6.5, 25 °C). In ethanol 2.25, hexane <0.001 (both in g/l, 20 °C).; Stability:Stable in air ( OECD 113/DTA). Hydrolysis DT50 4.3 h (pH 1), 25 d (pH 5).
Toxicology
(Rat): Oral LD50 >5000 mg/kg; Dermal >2000 mg/kg; Inhalation LC50 (4 h) >3.09 mg/l. Slightly irritating to skin, eyes.
Environmental Profile
Ecotoxicology: 
Algae: LC50 (72 h) for Scenedesmus subspicatus 47.1 mg/l; LC50 (5 d) for Selenastrum capricornutum 21.7 mg/l.Bees: LD50 (48 h) (oral) >117 µg/bee; (contact) >200 µg/bee.Birds:Acute oral LD50 for bobwhite quail, mallard ducks >2000 mg/kg. LC50 (8 d) for bobwhite quail >5200 ppm.Daphnia: LC50 (48 h) 87 mg/l.Fish: LC50 (96 h) for rainbow trout and common carp >100 mg/l.Worms: LC50 (14 d) for Eisenia foetida 1098 mg/ kg soil.Other beneficial spp.:Harmless to Aleochara bilineata, Poecilus cupreus, Typhlodromus pyri, Orius insidiosus, Aphidius colemani, Aphidius matricariae, Chrysoperla carnea

Environmental fate:
 Animals:Quickly and efficiently eliminated (mainly via excreta) and extensively metabolised in all species tested (rats, farm animals), without accumulation in most major animal food products. The metabolic pathways are similar for all species. Pymetrozine is theSoil:In soils, very rapidly and strongly adsorbed, with low mobility and low leaching potential. Soil 50 2-69 d, DT90 55-288 d. Rapidly degraded in slightly acidic or sunlight-exposed surface water; 50WATER SOLUBILITY: 270 mg/l at 20°C HAZARDS: Fish: LC50 (96 h) >100 mg/kg (rainbow trout, bluegill sunfish, carp). Bird: Oral LD50 >2000 mg/kg (bobwhite quail, mallard duck). Bee: (48 h) Oral LD50 >117 μg/bee
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

Porduct NewsMore

EU proposes not to renew approval of pymetrozine

Pymetrozine

EFSA evaluated the necessity of pymetrozine as an insecticide

Pymetrozine

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