Dimilin 2L is now approved for the control of infestations of grasshoppers and Mormon crickets on pastures, improved pastures, grasslands and non-crop areas used for production of native, domesticated forage plants used for grazing or feeding livestock. Dimilin 2L should be applied on pasture grass at a rate of 2 fluid ounces per acre.
Previously registered for control of grasshoppers and Mormon crickets on rangeland, and soybean and cotton fields, Dimilin 2L insect growth regulator disrupts the formation of chitin in the grasshopper’s exoskeleton. Applied by ground or air when juvenile grasshoppers are at the second and third instar stage, Dimilin effectively interrupts the nymph’s ability to molt and affects its coordination and feeding habits.
Pear, tree nut and stone fruit producers (excluding cherries) may now use Dimilin 2L to control a host of lepidopterous and other insect pests, including peach twig borer.
Pear growers can treat their orchards with Dimilin 2L for control of pear psylla, pear rust mite, codling moth and leafminers. A pre-bloom application of 40 to 48 fluid ounces per acre of Dimilin 2L may be made during the delayed dormant to the popcorn stage period for control of pear psylla and pear rust mite. A post-bloom application of Dimilin 2L at normal codling moth rates and timings will also provide suppression of pear psylla. Dimilin 2L may be used at a rate of 12 to 16 fluid ounces per acre for control of codling moth, and at a rate of 8 to 16 fluid ounces per acre just prior to or during egg laying to control eggs and larvae of leafminers.
Dimilin 2L is now registered for use on almond, beech nut, brazil nut, butternut, cashew, chestnut, chinquapin, filbert (hazelnut), macadamia nut, pecan, walnut (black and English) and pistachios for control of peach twig borer, pecan nut casebearer, hickory shuckworm, pecan weevil, filbert worm and codling moth. Dimilin 2L is also labeled for control of fall webworm, walnut caterpillar, red-humped caterpillar, oblique banded leafroller, omnivorous leaftier, omnivorous leafroller, variegated leafroller, winter moth and oriental fruit moth.
Dimilin 2L should be applied at a rate of 12 to 16 fluid ounces per acre during the dormant/delayed dormant or early bloom stages for control of peach twig borer, and at a rate of 16 fluid ounces per acre prior to egg laying for control of codling moth. Consult the label for recommended rates for control of other insect pests.
Producers of stonefruit (excluding cherries) may also use Dimilin 2L for control of peach twig borer, fall webworm, walnut caterpillar, red-humped caterpillar, oblique banded leafroller, filbert leafroller, winter moth, omnivorous leaftier, omnivorous leafroller, varigated leafroller and oriental fruit moth.
Dimilin 2L may be applied during the dormant/delayed dormant or bloom stage at a rate of 12 to 16 fluid ounces per acre for control of peach twig borer. An application of Dimilin 2L at the rate of 8 to 16 fluid ounces per acre at the first sign of larval infestation will provide control of fall webworm, walnut caterpillar, red-humped caterpillar, oblique banded leafroller, filbert leafroller, winter moth, omnivorous leaftier, omnivorous leafroller, varigated leafroller and oriental fruit moth.
Tim Weiland, technical product manager at Crompton Corp./Uniroyal Chemical, reports that Dimilin 25W has also been approved for control of pepper weevil on bell and other pepper crops.
Applied at low rates of use, Dimilin exhibits low toxicity to both mammals and honey bees, and rapidly degrades in the soil. However, it is a restricted-use pesticide because of toxicity to aquatic invertebrates such as Daphnia. It should not be applied by ground, within 25 feet or by air within 150 feet, of bodies of water, including lakes, reservoirs, rivers, permanent streams, natural ponds, marshes or estuaries. Dimilin should only be applied when the potential for drift to adjacent sensitive areas is minimal, and care should be taken to avoid drift and runoff, which may reach aquatic organisms.
For more information about Dimilin 2L, consult your area Crompton Corp./Uniroyal technical representative, Extension specialist or county Extension agent. Read the label for Dimilin 2L carefully and always follow label directions.