Rutgers University | New Jersey Agricultural Experiment Station | Pesticide User Responsibility

September 2, 2020

Reflex 2SL received a 24(c) SLN label for transplanted peppers and tomatoes

A 24(c) Special Local Needs label has been recently approved for New Jersey for use of Reflex herbicide for Control of Weeds in Transplanted Tomatoes and Transplanted Peppers. The use of Reflex 2SL is legal ONLY if a waiver of liability has been completed on the Syngenta website (https://www.syngenta-us.com/labels/indemnified-label-login).

Reflex is a selective preemergence herbicide for broadleaf weed control with both soil and foliar activity, but it is only labeled for preemergence use in transplanted peppers and tomatoes. The active ingredient in Reflex is fomesafen, a PPO inhibitor and the only herbicide in this family labeled for peppers and tomatoes. Broadleaved weeds are the main targetted species of this herbicide, that also activity on nutsedge. Expect excellent control of pigweed, (including Palmer amaranth), common ragweed, nightshade, and  common purslane, acceptable control of common lambsquarters, morningglories and galinsoga, and suppression of field bindweed and nutsedge at the rate labeled for transplanted tomatoes and peppers. Use of a surfactant will improves postemergence control of susceptible annual broadleaf weeds. Note that annual grasses and some annual broadleaf weeds, including spurred anoda or horseweed, will NOT be controlled by Reflex 2SL.
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Filed Under: Vegetable Crops Tagged With: , ,
June 30, 2020

NJDEP Notice on Dicamba registrations (XtendiMax, Engenia, FeXapan)

 

 

The NJDEP Pesticide Program would like to share an important message from USEPA, included below, along with some key points about how the Ninth Circuit US Court of Appeals’ June 3, 2020, vacatur of three pesticide product registrations (containing dicamba as an active ingredient) impacts New Jersey’s regulated community.

  • As of June 3, 2020 sales, distribution and purchasing is prohibited for the 3 pesticide products: XtendiMax with vapor grip technology, Engenia, and FeXapan, based on the cancellation of the registrations by USEPA.
    • Distribution by the registrant, or anyone other than the registrant, is permitted only for the purposes of proper disposal (i.e. returning the product to the registrant or a registered establishment).
  • Use of existing stocks of any of the 3 products previously purchased by licensed growers and commercial applicators is permitted until July 31, 2020 and must be consistent with the previously-approved product label.
    •    USEPA includes an assessment of the risks from the use of existing stocks in the June 8th final cancellation order provided below.
    •    Nothing precludes users from stopping use prior to the July 31, 2020 deadline.
  • Distribution, sale, or use of the 3 products must be consistent with the USEPA Final cancellation order dated June 8, 2020.  Activities inconsistent with the order are considered a violation of FIFRA.
  • Where USEPA’s cancellation order allows for the continued use of existing stock until July 31, 2020, NJDEP will maintain the registrations for the 3 products until that time.  Notice will be provided to registrants for the termination of the product registrations, as applicable.

Final Cancellation Order for Three Dicamba Products (PDF) (12 pp, 10 MB)

Filed Under: Commercial Ag Updates Tagged With: ,
June 30, 2020

Command 3 ME Label Change for Lima Beans

FMC Corporation, Rutgers University and the New jersey Department of Environmental Protection collaborated on labeling Command 3ME for use on lima beans through the release of a 24(c) Special Local Need Label. The label is available online at https://www.cdms.net/ldat/ld324024.pdf.

In the past, the Command 3ME label allowed use in lima beans, but this use was removed a couple of years ago. This new labeling essentially restores the previous use pattern. This labeling only applies to FMC’s brand of Command.

Command 3ME can be applied at 4 to 6 fluid ounces immediately after seeding, with the lower rate recommended for coarse-textured soils. This low rate does not provide control of pigweed species or most broadleaf weeds (including Palmer amaranth), rather it provides early-season weed suppression that allows for improved control with cultivation. This label also allows for planting lima beans 60 days after application in a preceding crop. This allows use for Command use in peas and planting lima beans at least 60 days later.

Currently, Command 3ME received a 24(c) SLN label for use on lima beans only in New Jersey, Delaware, Maryland, and Virginia.

Filed Under: Commercial Ag Updates, Vegetable Crops Tagged With: , ,
June 12, 2020

Carolina redroot control in cranberry with Callisto® herbicide

Figure 1. Carolina redroot infestation in cranberry bog

Carolina redroot (Lachnanthes caroliniana), a native plant of New Jersey Pine Barrens, has becoming an increasingly troublesome weed for cranberry production across the state (Figure 1). Carolina redroot is a perennial herbaceous weed species belonging to the Haemodoraceae family. It competes for nutritional resources during the cranberry growing season, and its rhizome serve as a feeding resource for wintering waterfowl that can cause severe uprooting damages of cranberry vines when bogs are flooded. Carolina redroot blooms after cranberry and its flower is very attractive to pollinators (Figure 2) at a time when insecticides may be applied to cranberry bogs. Additionally, the desiccated seed head of Carolina redroot can be picked up by harvesting equipment and broken in small pieces that will be difficult to eliminate during fruit processing.

Figure 2. Carolina redroot is very attractive for pollinators… at a time when insecticides may be applied!

 

Studies have been conducted at Rutgers since 2017 to screen various herbicides that can properly control or suppress Carolina redroot without injuring cranberry. In greenhouse screenings, Callisto® 4SC (mesotrione) has provided good control of Carolina redroot while maintaining excellent crop safety. Callisto is a systemic herbicide that will cause bleaching of weed leaves by indirectly inhibiting the biosynthesis of carotenoid that protect chlorophyll from photodegradation. Cranberry is highly tolerant because it is capable of rapidly metabolizing the mesotrione. Callisto will not kill Carolina redroot outright, but will weaken it and stunt it, preventing the formation of the floral stem (Figure 3). We are still evaluating if continued annual use of Callisto for two or three years will completely eliminate Carolina redroot.

Figure 3. Bleaching and stunting of Carolina redroot floral stem following Callisto applied at 4 fl oz/A

Spot application: ideally, Carolina redroot should be controlled before it starts colonizing large areas of a cranberry bogs. Therefore, scouting and mapping is a crucial and necessary step to detect early infestation that be treated with spot application of Callisto. We obtained in 2019 a 24(c) Special Local Need label for spot application of Callisto at rates that will help controlling perennial weeds such as Carolina redroot. We recommend mixing 3.2 teaspoons of Callisto per gallon of water and add crop oil concentrate (COC) at 1% v:v or 2.5 tablespoon per gallon of water. This rate will allow to spray up to 15 gallons of solution per acre while not exceeding the maximum labeled rate of 8 fl oz per acre and per application.

Figure 4. Reduction of Carolina redroot biomass with spot application of Callisto at three different rates and two different timings of application

At this rate and if Callisto is applied when Carolina redroot emerge above cranberry canopy in early to mid-June, we observed a reduction of Carolina redroot biomass by 70% at the end of the season. Higher rate will not significantly increase Carolina redroot suppression and later application in mid-July will not be effective (Figure 4). Spot applications will be sprayed with a backpack or hand-held sprayer that needs to be properly calibrated. Calibration of hand sprayers is determined by the walking speed of the applicator and the discharge rate from the nozzle along with the concentration of the material in the tank. Use great care in spot-treating. The difference between an 8-oz application and an 80-oz application is only seconds on the trigger. Spot treatments made to runoff will exceed the maximum application rate.

Figure 5. Annual sedge control with Callisto applied at 4 fl oz/A

Broadcast application: in bogs where Carolina redroot has colonized large areas, chemigation using irrigation sprinklers or boom application should be considered for broadcasting Callisto.  Callisto can be applied at up to 8 fl oz per acre per application, but we observed bleaching and stunting of Carolina redroot floral stem with Callisto at a 4 fl oz/A rate applied with a regular boom. If chemigating, we recommend Callisto to be applied at 8 fl oz/A. Always use a COC adjuvant at 1% v:v. All application should be made when Carolina redoot leaves emerge from cranberry canopy but before the on-start of bloom because COC adjuvant may injure cranberry flowers and reduce pollination. A second application at 8 fl oz/A can eventually be applied after cranberry bloom to help suppressing Carolina redroot. Callisto will also help controlling sedges or rushes (Figure 5). Callisto applications cannot exceed 2 per acre per year and a maximum of 16 fl oz per acre per year.

 

Filed Under: Cranberry Tagged With: , , ,
June 10, 2020

Important Update on Registration of Low-Volatility Dicamba Herbicides

On June 3, 2020, the U.S. Court of Appeals for the Ninth Circuit issued a ruling that vacates current U.S. registrations of of three dicamba herbicides, XtendiMax (Bayer), Engenia (BASF) and FeXapan (Corteva). The Court ruled in favor of a petition challenging the EPA’s 2018 registration decision. The ruling comes after a group of environmental organizations filed a petition with the Court challenging the U.S. Environmental Protection Agency’s . Other dicamba-containing products are not concerned by this ruling.

The subsequent action by the EPA provides, among other things, that “growers and commercial applicators may use existing stocks that were in their possession on June 3, 2020, the effective date of the Court decision. Such use must be consistent with the product’s previously-approved label, and may not continue after July 31, 2020.”

Click here for the EPA’s full order – see page 11 for key details.

The EPA’s order addresses the use, sale, and distribution of existing stocks of  low-volatility dicamba products impacted by the Court’s ruling.

 

 

Filed Under: Commercial Ag Updates, Field, Forage & Livestock, Fruit, Strawberry, Tree Fruit, Vegetable Crops, Wine Grape Tagged With: , , ,
June 1, 2020

Residual Weed Control in Cabbage and Other Cole Crops

Good weed control in transplanted and seeded cole crops requires planning and the use of pretransplant or preemergence herbicide applications.

Cabbage treated pretransplant with Goal and never cultivated.

Cabbage treated pretransplant with Goal.  The crop was never cultivated.

Preplant incorporate Treflan HFP at 1 to 1.5 pt/A for seeded and up to 2 pt/A for transplanted, or apply Dacthal 6F at 6 to 14 pt/A or Prefar 4E at 4 to 9 qt/A preemergence or post-transplant to control annual grasses and certain broadleaf weeds. Choose Dacthal or Prefar in early spring when soils are cold and wet when Treflan may cause temporary stunting. Please make sure to check the label before mixing as these herbicides are registered for use only on certain cole crops.

Goal 2XL and GoalTender 4F are labeled for transplanting ONLY!.  Goal 2XL can ONLY be used pretransplant whereas GoalTender 4F can be used pre-transplant or post-emergence with a 24(c) Special Local Needs label on broccoli, cabbage and cauliflower in New Jersey (NJ 24(c) SLN GoalTender 4F). Build beds, spray, and transplant through the herbicide barrier. Use Prefar or Dacthal post-transplant for grass control. Treflan or Dual Magnum applied preplant incorporated may increase the risk Goal injury. Do NOT cultivate unless weeds appear. Incorporation of Goal reduces or eliminates the effectiveness of the product for weed control. Goal and GoalTender are registered for use only on certain transplanted cole crops.

Dual Magnum 7.62E has a 24 (c) Special Local Needs label for use on cabbage in New Jersey. Use Dual Magnum at the rate of 0.5 to 1.33 pt/A  depending on soil type. Use the lower rate on soils that are relatively coarse-textured or low in organic matter; use the higher rate on soils that are relatively fine-textured or high in organic matter. Apply to weed free soil in transplanted cabbage after transplanting, or to direct seeded cabbage when the seedlings have developed 3 to 4 true leaves. The delayed use in directed seeded cabbage reduces the risk of slight temporary stunting of the crop. Dual Magnum controls annual grasses, nightshade species, and galinsoga. Yellow nutsedge will be suppressed or controlled at the rates and use patterns on the Dual Magnum label for cabbage. To obtain a label, an indemnification agreement must be filled out on line agreeing not to hold the manufacturer responsible for crop damage. Obtain a copy of the label and complete the indemnification agreement on the Syngenta website. Register or sign in, select state and product, and submit. You will then be asked to select your crop before accepting or not the waiver of liability and indemnification agreement. You must have a copy of this 24(c) label if you want to use Dual Magnum on cabbage!

Consult the 2020/2001 Mid-Atlantic Commercial Vegetable Production Recommendations for rates and additional information.

 

Filed Under: Vegetable Crops Tagged With: , , , ,