Bringing Innovative Agricultural Chemicals to a Growing Global Market


has primary responsibility for development, registration and logistics for Ishihara Sangyo Kaisha, Ltd.’s products in the Americas. ISK Biosciences brings several new agricultural products to serve a growing, global market.



  • Summit Agro USA launches Verdepryn 100SL

    The Sumitomo Corporation/Ishihara Sangyo Kaisha (ISK) joint venture, Summit Agro USA (Durham, North Carolina), has introduced Verdepryn™ insecticide, with the active ingredient Cyclapryn, offers growers exceptional broad-spectrum insect control in pome fruit, stone fruit, grapes, berries, tree nuts and citrus. It has been launched by Summit Agro USA.  Verdepryn is powered by the same active ingredient as Harvanta®, used in vegetable crops.  This insecticide offers competitive control to other diamides while using much less active ingredient.

  • Summit Agro USA debuts tolpyralate herbicide

    Summit Agro USA has introduced the post-emergence maize herbicide, Shieldex®400 SC (ISK’s tolpyralate 400 g/litre), in the US. The hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor controls a range of broadleaf weeds and grasses including “troublesome” weeds such as Palmer amaranth/ tall water hemp (Amaranthus spp), giant ragweed (Ambrosia trifida) and giant foxtail (Setaria faberi), the company points out. Shieldex 400 SC will be distributed exclusively by Summit Agro USA’s partners, Helena Chemical (Collierville, Tennessee) and Tenkoz (Alpharetta, Georgia). The EPA proposed the approval of tolpyralate in May. ISK Biosciences submitted applications for joint review by the EPA and the Canadian Pest Management Regulatory Agency. The latter proposed to register the herbicide in September.

  • Canada approves ISK’s cyclaniliprole

    The Canadian Pest Management Regulatory Agency (PMRA) has approved Ishihara Sango Kaisha’s insecticide, Cyclaniliprole 50SL (cyclaniliprole 50 g/litre). It is for the control or suppression of various insect pests on a range of fruit, vegetable and tree nut crops. The PMRA proposed the approval in late July. The review was conducted jointly with thr US EPA, which proposed registration in May and granted it in August. ISK began selling cyclaniliprole in South Korea this year and expects introductions in the US, Canada, Australia and Japan.

  • OHP appointed to distribute Astun Fungicide

    ISK has announced the appointment of OHP to distribute its new Group 7 fungicide isofetamid in the US ornamental markets.  Astun fungicide was registered by USEPA 71512-23, 2017 and will be launched this fall following completion of necessary state registrations.

    Further details on OHP can be found at

  • Kenja® 400SC Label Expansion approved by USEPA

    The Kenja® 400SC Fungicide label has now been expanded to include Pome fruit, Stone fruit, Cane and bush berries and beans and peas.

    Kenja now offers lettuce (Sclerotinia) drop control.  This unique SDHI fungicide offers in-season disease control and helps minimize SDHI resistance potential.

    Kenja is also registered in almond for brown rot blossom blight, anthracnose, green fruit  or jacket rot, , and shot hole.

    In legume vegetables, Kenja controls White and Gray molds.

    Kenja disease management is also offered in grapes for Botrytis bunch rot, powdery mildew,  and anthracnose; berries for gray mold; pome fruit for scab and suppression of powdery mildew; stone fruit for blossom blight and brown rot; and rapeseed for Sclerotinia stem rot.

    Kenja is distributed in the USA by Summit Agro  US.

  • US EPA to OK ISK’s Cyclaniliprole

    The US EPA has proposed the approval of Ishihara Sangyo Kaisha US subsidiary ISK Biosciences’ insecticide, Cyclaniliprole 50 SL (cyclaniliprole 50 g/litre), for use on a range of fruit and vegetable crops. The soluble liquid formulation is for use on pome and stone fruit, nut trees and grapevines at 16.4-22 fl oz/acre (1.2-1.6 litres/ha) and on brassica and non-brassica leafy vegetables, fruiting vegetables and cucurbit vegetables at 10.9-16.4 fl oz/acre. Among the pests controlled are codling moths (Cydia pomonella), oriental fruit moths (Grapholita molesta), beet armyworms (Spodoptera exigua) and diamondback moths (Plutella xylostella). Cyclaniliprole is an anthranilic diamide insecticide that targets ryanodine receptors of calcium channels in insect cells. The EPA notified receipt of ISK’s registration application in 2015. The review was conducted jointly with the Canadian Pest Management Regulatory Agency, with the participation of the Australian Pesticides and Veterinary Medicines Authority.

  • Prolivo™ Fungicide Registered by USEPA

    Prolivo™ 300SC (active ingredient: Pyriofenone) fungicide has been registered for use in grapes, cucurbits and berries.  Used preventatively, it stops powdery mildew at the onset of the disease.

    Prolivo 300SC is being distributed in the USA by Summit Agro US.

  • Beleaf® insecticide label expanded to include Citrus use

    The Beleaf insecticide (active ingredient Flonicamid) label has been expanded to include citrus.  Beleaf offers excellent control of Asian Citrus Psyllid and Citrus Leafminer and is soft on beneficial insects.

    Beleaf is distributed by FMC Corporation.

  • Property® Fungicide Registered for use in Canada

    Property 300SC (active ingredient: Pyriofenone) fungicide has been registered for use in grapes, cucurbits and berries.  Used preventatively, it stops powdery mildew at the onset of the disease.

    Property 300SC is distributed in Canada by Engage Agro

  • US EPA approves Kenja® for Gray Mold on Berries in WA

    A specific exemption has been granted by the US EPA for growers in the State of Washington to use Kenja® 400SC (Isofetamid 400SC) to control Gray Mold (Botrytis Cinerea) on Blackberries, Blueberries and Raspberries.  Kenja 400SC is distributed by Summit Agro USA.

  • Segway® Label Update

    EPA approves the addition of Phythium root rot control in turf to the Cyazofamid 400SC Turf and Ornamental Label.  Cyazofamid is distributed as Segway® Fungicide SC by PBI/Gordon Corporation for the turf market.

  • KENJA® (Isofetamid) Registration

    Summit Agro receives registration from the state of California for ISK Biosciences’ KENJA® 400SC (Isofetamid) for Botrytis gray mold control in strawberries.  Kenja can be applied to strawberries through day of harvest. 

    KENJA fungicide fends off botrytis from the field to the packing house, ultimately extending the shelf life of freshly harvested strawberries.  Kenja is marketed by Summit Agro US.  Learn more about Kenja® at

  • Beleaf® New Approval

    Beleaf® has received Canadian approval for aphid and lygus control for Greenhouse Strawberries in British Colombia.

  • Kabuto® (Isofetamid) Fungicide SC for Turf

    PBI Gordon announces Kabuto® (Isofetamid) Fungicide SC as a proprietary liquid formulation to control dollar spot diseases in turf grass.

  • Ranman® Label Update

    Bulb Vegetable Crops have been approved by the EPA to be added to the Ranman® Label for control of Downy Mildew.