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MOSTYN DUO CS 

MOSTYN DUO CS 

BROAD-SPECTRUM WATER-BASED CONCENTRATE INSECTICIDE WITH REMARKABLE KILLING POWER, EXCELLENT FLUSHING 
OUT AND KNOCK DOWN ACTION, WITH RESIDUAL ACTIVITY FOR UP TO 90 DAYS. CONTROLS FLYING AND CRAWLING INSECTS.

ACTIVE INGREDIENT: 

100 g/L (10.7 % w/w) Cyphenothrin; 10 g/L (1.1 % w/w) Prallethrin       

 

FORMULATION: 

Mixed formulation of CS (capsule suspension) and EW (emulsion, oil in water)        

MOSTYN DUO CS

 is very effective against

 ants

 (

Lasius niger)

 (adults and nymphs), 

bed bugs

 (

Cimex lectularius

) (adults and nymphs), 

flies

 (

Musca domestica, Chrysomya megacephala

Haematobia irritans

 and 

Stomoxys calcitrans

), 

litter beetles

 (

Alphitobius diaperinus

(adults and nymphs), 

mosquitoes

 (

Aedes aegypti, Aedes albopictus, Culex pipiens, Anopheles gambiae

), 

poultry red mites 

(

Dermanyssus 

gallinae

) (adults and nymphs), 

cockroaches 

(

Blatta orientalis

 and 

Blattella germanica

) (adults and nymphs), 

wasps

 and 

hornets

 

(

Vespula vulgaris

 and 

Vespa velutina

).

MOSTYN DUO CS 

is designed for use in domestic and industrial premises, in public and office buildings, in and around domestic 

areas (including kitchens), hotels, shops, hospitals (excluding occupied wards), municipal buildings, food handling areas (restaurants 

and retailers), slaughter houses, refuse tips, refuse storage areas, and in and around barracks (military use). 

MOSTYN DUO CS

 can be used in agricultural areas, stables (including chickens, pigs, cattle and horses), sheds, poultry farms, farm 

buildings and animal husbandry areas like dairies, animal and avian housing and also in food-storage and retail, meat packing plants, 

supermarkets, raw material stores (excluding grain stores), grain mills, empty granaries and utility stores. 

USES AND APPLICATIONS  

MOSTYN DUO CS 

provides rapid knockdown, kills within a few 

hours, and can be used for crawling and flying insect control 

with an extended residual activity up to 90 days. The residual 

activity depends upon the surface being applied to and the 

environmental conditions. Repeat application if necessary.

MIXING INSTRUCTIONS:

Shake the product container well before use. Fill the clean tank 

of the spray equipment with half of the required water content. 

Add the correct volume of 

MOSTYN DUO CS

. Wash the empty 

container of 

MOSTYN DUO CS

 three times with clean water and 

empty into the tank of the spray equipment. Fill up the spray 

tank with the missing volume of clean water. Close the spray 

tank and agitate. If a delay occurs between treatments, 

re-agitate before use. Do not store prepared spray solution and 

use the ready-mixed spray solution as soon as possible. Clean the 

spray equipment with clean water after treatment. 

Do not mix 

MOSTYN DUO CS

 with other products (biocides 

or disinfectants). 

APPLICATION CONCENTRATION / APPLICATION RATE:

Surface, Spot, Barrier, Perimeter, Crack and Crevice 

application:

Applications

Mostyn 

Duo CS

 

Water* 

Surface

Low infestation
or application on clean 
surfaces

75 mL

5 L 

100 m² 

(50ml/m²)

High infestation or
application on dirty and/
or highly absorbent 
surfaces and on floors

100 mL

5 L 

100 m² 

(50ml/m²)

Targeted ant, wasp and 
hornet nest applications

1ml

50ml

1 m²

* The required water content may vary depending on surface 

condition and application equipment.

Apply through a suitable hand mechanical or electric sprayer 

producing a coarse spray. Spray evenly to all surfaces paying 

special attention to cracks, crevices, dead spaces and places where 

insects harbour. The product can be applied to porous and 

non-porous surfaces. The product is not for use on clothing or 

bedding or in cots where infants sleep.  

Ant nests:

Treat an area of 1 m² around the nest entrance and a band of 10 

cm on the foraging paths of the ants to the nest. Ants will carry 

microcapsules into nest.

Wasp and hornet nests:

Apply liberally and directly to the nest or to entrance holes of 

concealed nests until the nest is saturated. Treatments should 

only be carried out at dusk or other times when wasp and 

hornet activity around the nest is minimal. Apply the product 

with suitable spray equipment using a long lance. Wear suitable 

protective clothing to prevent injury. Remove the nest after 

treatment. 

Domestic areas (flying and crawling insects):

In domestic premises as well as in continuously occupied areas, 

where humans and pets can come into contact with the spray. 

Apply the product as band/spot or crack and crevice treatment 

only. Close all doors and windows prior to use. Do not enter the 

treated area for at least 30 minutes after treatment and until the 

spray mist has dried. Ventilate the treated area well.

Agricultural premises: 

Do not apply directly to animals. Clean surfaces prior to 

application. The surfaces should be dry before applying the 

product. Apply the product as a fine mist with low pressure; treat 

surfaces thoroughly but not until runoff, pay particular attention 

to cracks, crevices and places where insects harbour.

DIRECTIONS FOR USE  

500 ml 

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