Whitefly Control: |
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Important pest of protected crops. Adults usually found laying eggs on underside
of the youngest leaves. Newly hatched larvae are mobile for a few hours before
settling as immobile 'scales' where they suck plant sap. High numbers of
whitefly produce large quantities of honeydew encouraging black sooty mould.
SB Plant Invigorator may be used as a contact insecticide to control adults and larvae. Mycotal may be used to control adults and larval scales if high humidity can be maintained for a period after application. This treatment is ideal to integrate with biological control agents for 'hot spots'.
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Encarline f (Encarsia formosa) |
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HOW IT WORKS: Adult wasp lays 60-100 eggs singly into whitefly scales, which turn black as the parasite develops. SPECIES CONTROLLED: Glasshouse whitefly (Trialeurodes vaporariorum) and cotton whitefly (Bemisia tabaci). WHEN TO USE: Encarsia are introduced as pupae either on cards, which are hung within the crop or as loose black scales. RATE OF USE: Cool Grown Crops: 3 wasps per 1 m2 until week 12 and then 1 wasp per 1 m2 per week. Heated Crops: 0.5 to 1 wasp per 1 m2. If whitefly are present increase rate to 5 wasps per 1 m2 for 6 weeks. Poinsettia: preventative is 1 wasp per 3 plants per week; curative or where Bemisia tabaci (cotton whitefly) is suspected then 1 wasp per plant per week. Also available as a 50:50 mix with Eretmocerus to provide improved control of whitefly on many crops.
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Eretline (Eretmocerus eremicus) |
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HOW IT WORKS: The orange/yellow coloured adult wasp lays an egg next to and slightly below a developing whitefly larva (scale). This hatches and feeds on the whitefly larva finally pupating within the empty host skin as a light yellow 'mummy'. A small hole maybe found after the adult wasp has emerged from the whitefly pupa. SPECIES CONTROLLED: This very useful parasitoid can attack, kill and develop in several whitefly species, including Bemisia tabaci (cotton whitefly) and Trialeurodes vaporariorum (glasshouse whitefly). WHEN TO USE: On heated, edible and ornamental crops (+16oC) this wasp can be used throughout the year. On other crops use late spring to late autumn; ideal for Poinsettia crops. RATE OF USE: 2 to 8 wasps per m2 of crop area, introduce low rate weekly or high, curative rate for a minimum of 5 to 6 weeks. Also available as a 50:50 mix with Encarsia to provide improved control of whitefly on many crops. This parasite is released under licence for use on glasshouse grown crops, please contact Fargro for further details.
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Macroline c (Macrolophus caliginosus) |
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HOW IT WORKS: Adults and nymphs attack all stages of pest. SPECIES CONTROLLED: Whitefly, but will also feed on leafhopper, caterpillar, leaf miner, spider mite and most soft bodied prey. WHEN TO USE: Early season. Used mainly on tomatoes (not cherry tomatoes) and aubergines. Consult Fargro for advice. RATE OF USE: 0.5 to 1 per m2, usually as a single introduction in early season. Long generation time of six weeks means that it takes time before it exerts a significant effect on the pest populations and other controls will be necessary before it is fully established. This predator is released under licence for use on a limited range of glasshouse grown crops, please contact Fargro for further details.
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Mycotal (Verticillium lecanii) |
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TYPE: An microbial insecticide containing fungal spores of a specific strain of Verticillium lecanii. Mycotal is registered as a professional pesticide under MAFF 04782 and contains 16.1%w/w Verticillium lecanii. HOW IT WORKS: Mycotal is applied as a spray. Under the correct environmental conditions the spores germinate and grow producing hyphae that penetrate into the body cavity of the insect where they proliferate and kill it. A new generation of spores may be produced. SPECIES CONTROLLED: Whitefly. However it also infects mealybug, scale insects and thrips. WHEN TO USE: Requires a minimum teperature of 18oC and relative humidity of at least 80% (95% at the leaf surface). WHERE TO USE: Approved crops are protected aubergines, runner beans, broad beans, french bean, cucumbers, lettuce, ornamental plant production, peppers, and tomatoes. RATE OF USE: 1 g/l or 3 kg/ha. Users of Mycotal require training in pesticide use. ALWAYS READ THE LABEL. USE PESTICIDES SAFELY.
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Swirskiline as (Amblyseius swirskii) |
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TYPE: Predatory mite. HOW IT WORKS: Predates Can survive in the absence of prey feeding on pollen and mould. SPECIES CONTROLLED: Predates on whitefly (Trialeurodes vaporariorum and Bemisia tabaci) eggs and larvae, as well as to a lesser extent spider mite and thrips. It will not control established populations or where large numbers of adults are moving into the crop. WHEN TO USE: Introduce early into the crop cycle. To protect. Requires a minimum temperature of over 18oC. Unsuitable for some crops. This predator is released under licence for use on glasshouse grown crops, please contact Fargro for further details.
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Specifications may differ from those listed here and change without notice. © 2007 Copyright of Fargro Ltd and its suppliers. www.fargro.co.uk |
