Michigan State University Extensionhas updated their louse and disease management passport for the 2020 glasshouse season . There have been some changes from the premature 2019 recommendations . These recommendations are updated every year to reflect efficacy of pesticide as MSU reference specialist and their countrywide colleagues do inquiry trials evaluating the products against common glasshouse insect , mites or diseases . The pesticide are valuate by a net of researchers involved in theIR-4 Project , a research group that facilitates the labeling of pesticides on specialization crops , including nursery crop .
Photo by Heidi Lindberg , MSU telephone extension
worm managementMSU Extension entomology specialist for ornamentals , David Smitleyhas free his “ 2020 Greenhouse Pest Management with Insecticides ” recommendations . These are the urge product to control thrip , aphids , whitefly , spider mites , broad and Cyclamen purpurascens mites , fungus gnats , mealybugs and Florida fern caterpillar .
grower of greenhouse vegetables and commons can employ the guide , “ Recommended Insecticides for Common Greenhouse Pests on Vegetables , Herbs and Leafy Greens , ” when conceive an insecticide app program . The guide bring home the bacon the names of the mathematical product , fighting ingredients , vegetable crop on the label and recommended pests they control . For more information on the templet , see the MSU Extension article , " insecticide for common pests on glasshouse vegetables and transplants . "
change from 2019There are two elementary changes that differ from the 2019 recommendations . First , there are now management recommendations on leafminers , which include Arena , Mainspring , Conserve and Azaguard . secondly , there are three new or re - unblock insecticide : Altus , Arena and Xxpire . Altus ( flupyradifurone ) is label for use against aphid , leafminers , mealybug and whitefly as a foliar spray or systemic soil drench . Arena ( clothianidin ) is a neonicotinoid with good natural process as a systemic grunge drench or as a foliar spray against aphids , whitefly , leafminers and mealybugs . Xxpire should be used as a foliar spray against thrips , whiteflies and aphids .
Xxpire was first release in 2014 , however , the registration was voluntarily commit until it was just recently re - registered in Michigan in 2020 . Altus and Xxpire are new or relatively newfangled types of insecticides . They may be helpful in make out insects that have become resistant to to a great extent - used products that have been on the grocery for recollective period of time .
Disease managementMSUExtension plant pathologistMary Hausbeckhas release her young " 2020 Greenhouse Disease Management " recommendations . The products are sort on a range from “ A+ ” or “ B / B- ” squad products . The “ A ” team ware provide the ripe control for the disease , and “ B ” squad products are those that provide special control and are good to include in a spray rotation .
Hausbeck has also provided an update “ 2020 Greenhouse Impatiens Downy Mildew Program ” for both susceptible and impatiens downy mildew - resistant cultivar .
Hausbeck and her colleague have also developed aguide for disease management specifically for veggie and herbaceous plant crops . The scout provides the following information about each registered merchandise for veggie transplants and herbs : 1 ) active ingredient , 2 ) trade name of the product , 3 ) FRAC code ( a guide for take turns products to hold up / reduce pathogen impedance ) and 4 ) re - launching interval . The disease recommendations are grouped by crop groups : 1 ) brassica , 2 ) cucurbit , 3 ) leafy , 4 ) fruiting and 5 ) herbs . Within each harvest aggroup , the table includes the butt pathogen including : bacterial blight , downy mould , folio spot , powdery mould , Phytophthora , Rhizoctonia and Sclerotinia .
Changes from 2019The self-aggrandising changes to the " 2020 Greenhouse Disease Management " recommendation are those to the impatiens downy mildew prevention program . The newly - release impatiens cultivars , Imara XDR and Beacon , are not susceptible to impatiens downy mold . These cultivar were include in many nationwide test during 2019 and ply an splendid pick peculiarly for use in landscape sites that may be infest with the impatiens downy mildew .
As an " insurance policy , " Hausbeck suggests a single drench program of Subdue MAXX ( 1 fluid ounce per 100 congius ) plus Segovis ( 3.2 fluid troy ounce per 100 gal ) prior to shipping impatiens downy mildew - resistant cultivar . The fungicide programme for the impatiens downy mildew - susceptible impatiens cultivars include three separate applications of Subdue MAXX and Segovis during output . For more information , see the MSU Extension clause , “ receive impatiens back into your landscape . ”
For Botrytis , there are a few addition to the “ A ” squad , including :
For powdery mold management , MSU inquiry studies have shown remainder in control among “ A+ Team , ” “ A / A- Team , ” and “ B Team ” products . The Banol ( propamocarb ) fungicide is a new addition ( FRAC code : 28 ) to the “ A ” squad for Pythium control .
If you have questions about these worm and disease direction recommendations , liaison the generator or your localMSU Extension nursery educator . you’re able to also find more information on harvest rubber and efficaciousness of product on theEnvironmental Horticulture Research Summariespage of the IR-4 Project website .
Source : Michigan State University ( Heidi Lindberg , Mary Hausbeck and David Smitley )
