Amblyseius barkeri



Production
Bark-mite (Amblyseius barkeri =Neoseiulus barkeri
Packaging type
25000 predatory mites (all stages) in 250 ml bottle mixed with bran and prey mites
Crops
Amblyseius barkeri can be used in cut flowers, ornamental pot plants and strawberry
Targets
Board mites, cyclamen Mite and bulb mites, (Polyphagotarsonemus latus and Phytonemus pallidus), all stages. Also for biocontrol of thrips, preferring younger stages. Predatory mites also survive on other mites and pollen and can survive for a number of weeks without food.
                            The method of releasing Amblyseius barkeri

Amblyseius barkeri Rate
(individuals/ m²)
Acreage
(m²/bottle)
interval (days) Remarks
Preventive 50/m² 500 14 when broad mites is absent
curative light 100/m² 250 14 start when s broad mites is present (only 1-2 female per leaf)
curative heavy 125/m² 200 7 infested areas only
It is very hard to detect the first thrips in the field. So, fast releasing Amblyseius barkeri is recommended to keep the thrips densities as low as possible, even if no thrips have been found yet.

   
        Female Amblyseius barkeri
                      Releasing Amblyseius barkeri
Releasing
Before releasing, turn and shake gently the bottle
Open the cap, or press on centre of cap to open dosage hole
Pour-out the material inside bottle on leaves
1 releasing points per square meter is necessary, or evenly distributed over the total surface
 
Storage and handling
If you have received the packaging of this predatory mite, please release them as soon as possible, because you know biological beneficials have a short life expectancy. Storing them for a long time has a negative influence of their quality. Low temperatures also have a negative influence on Amblyseius barkeri. BESTmites co. ltd. is not liable for any loss of quality if the product is stored for longer than recommended and/or under incorrect conditions. If necessary, please store them under the conditions described below.
·         Storage after receipt: 5days
·         Ideal storage temperature: 10°C
·         In the dark with enough ventilation to avoid CO2 accumulation
Remarks
Apply preventive introduction on pollen only from the moment when crop flowers continuously. Above 75% relative humidity and 20 ℃ is necessary when you are going to introduce this predatory mites. In any case, please careful reading the side effects of different pesticide to this predatory mite in our website. But, if you had introduced Amblyseius swirskii into your corps, Amblyseius barkeri can not be used, because Amblyseius swirskii is an obviously winner in their competition. And Amblyseius swirskii can perform more than Amblyseius barkeri .
 
Advantages
Amblyseius barkeri is more important predator for broad mite control, as it offers the following advantages:
·          Amblyseius barkeri can be used as preventative measure, also without pollen in crops
·            Amblyseius barkeri can be stored briefly at 10°C.
·            Amblyseius barkeri is not sensitive to day length (no diapause).
·            Amblyseius barkeri can survive on pollen.
 
Biology
The predatoty mite Amblyseius barkeri (= Neoseiulus barkeri) is not quite conspicuous on the leaves because its body is less than 1 mm. Only when it is moving on the surface of leaf, you can easily find it.
     This predatory mite has five different developmental stages: egg, larva, protonymph, deutonymph and adult (female or male). The female mite mates several times. She deposits 1-2 eggs daily on leaf hairs close to the veins on the underside of the leaf. The larvae can develop into protonymph without food, but the food is necessary for development of protonymph. If there is not enough prey in the field, it can develop into adult with pollen as food. The development from egg to adult takes 8-11 days (at 20-25°C). A female Amblyseius barkeri can lives for about 3 weeks.
      Amblyseius barkeri can pierce their prey and suck them empty. Besides young larva of thrips, they prey on board mites, cyclamen Mite, bulb mites, spider mites, or eggs and larvae of other predatory mites, for example Phytoseiulus persimilisAmblyseius barkeri prefers first instar thrips.
 


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