Runner 240SC

Runner 240 SC

RUNNER 240 SC is a molting acceleration product and is most effective after being ingested by young larvae, it also has good ovicidal effect, but minimal contact effect on older larvae. The active ingredient Methoxyfenozide, mimics the action of the natural molting hormone of lepidopterous larvae (L1 – L2 stages), and differs from other insect growth regulators like chitin-biosynthesis-inhibitors or juvenile-hormone mimic products.

Mode of action.

  • Methoxyfenozide is an Insect Growth Regulator (IGR)It interferes in the development process of immature lepidopterous insect pest(caterpillars)
  • It mimics and competes with the natural hormone, ecdysone, for its receptor and initiates a pre-mature and lethal molt to caterpillars
  • It’s not metabolized as easily as ecdysone, so it causes unnaturally high levels of the ecdysone mimic. As a result the ecdysone hormone, required for completing a molt, is not released and the intoxicated insect is caught in the middle of a molt.
  • Effects are different from chitin biosynthesis inhibitors and juvenile hormone mimics and take place over a much shorter time period.
  • Highly selective for Lepidoptera ecdysone receptors, albeit it will bind to other taxa EcR receptors with a much lower affinity

Uptake path and other attributes

  • Acts almost exclusively by ingestion: stomach poison
  • Very limited contact activity
  • Excellent residual activity due to
    • Very good rain fastness
    • Minimal degradation via photolysis and chemical hydrolysis
    • No volatility
    • Primary route of degradation is through microbial action which needs considerable time
  • Primarily affects young larvae; ovicidal effect in some species.  Adult fertility and fecundity effects also observed in some species
  • It is very important to have exceptionally good coverage and to apply it early. Don’t consider and use it as a curative treatment but as a “preventive” one.

Symptomology of Intoxicated Larvae

  • Larvae feeds on treated foliage and stop feeding in 2-14 hrs.
  • Molt starts but larvae are unable to complete cycle
  • Still able to move, but unable to feed
  • Head capsule slips, abnormal new cuticle formed
  • Discoloration/darkening of cuticle
  • Inactive or uncoordinated larvae
  • Extrusion of hind gut
  • Larvae trapped within old cuticle, cannot shed it
  • Inability to complete a molt causes dehydration and loss of hemolymph leading to desiccation
  • Insect unable to feed and starves
  • Death occurs in several days

The larvae die on account of their inability to feed and complete the molting process.

Optimal application timing………

The best positioning of RUNNER 240 SC applications are at the beginning of peak moth flight or before egg hatch of peak moth flights. This will ensure that the majority of eggs are laid on treated surfaces and emerging larvae are exposed to RUNNER 240 SC before any damage is caused.

What does this practically mean

  • 1st generation (discrete stages)

      At the start of oviposition.

  • 2nd and 3rd generations (overlapping stages)

      1st application at the start of oviposition

      2nd application about 2 weeks later.

RUNNER 240 SC has a perfect fit in IPM programs. Why??

  • Safe on beneficials
  • Non-toxic on bees
  • Not acutely toxic to humans
  • Can be used during flowering
  • Does not cause flaring of other pests: aphids, mites, whiteflies, scales, mealybugs

REGISTERED CROPS AND RATE OF USE

CROPPESTAPPLICATION RATE Lts/HaPRODUCT RATE 20 Litres KnapsackSPRAY VOLUME Lts/Ha
CabbageDiamond Black Moth
Cabbage sawfly
Spodoptera spp  
0.5 Litres10ml1000litres
RosesSpodoptera spp  0.5 Litres10ml1000litres
     

PHI – 7 Days in cabbages

Re-entry interval – 6 hours

WHO Class: III

Insecticide Resistance Management (IRM)

The classification scheme of insecticides is based on “mode of action”. RUNNER 240 SC is classified as a diacylhydrazine (group 18) insecticide.

Any insect population may contain individuals naturally resistant to RUNNER 240 SC. The resistant individuals will eventually dominate the insect population if these insecticides are used repeatedly over long periods or to consecutive generations. RUNNER 240 SC or other related insecticides may not control these resistant insects. Local experts should be consulted for resistance strategies and specific recommendations. It is recognized that resistance of insects and mites to insecticides and acaricides can also result from enhanced metabolism, reduced penetration or behavioral changes that are not linked to any site of action classification but are specific for individual chemicals or chemical groupings. Despite this, alteration of compounds from different chemical classes remains a viable anti-resistance management technique.

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RUNNER 240 SC is a molting acceleration product and is most effective after being ingested by young larvae, it also has good ovicidal effect.

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