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ORGANIC POTATO PRODUCTION Management Option Recommendation for Colorado Potato Beetle to keep the trap crop attractive. A flamer or vacuum can be used to remove the adults on the trap crop. Late season: Plant strips of late emerging, late maturing cultivar such as Elba or Allegany. Foliage of these varieties will remain green and attractive to dispersing adults much longer than those of shorter season cultivars. A flamer or vacuum can be used to remove adults on the trap crop. Cut tubers placed along the perimeter of a potato field prior to sprout emergence can also be effective in arresting and congregating adult potato beetles for control by flaming. Trench trap Trench traps effectively control adult beetles when hibernation areas are known. Install plastic-‐lined trench traps next to hibernation sites or between adjacent fields at least one week before adults emerge. Adults dispersing by walking (50-‐75% of the overwintered population) are trapped in the trench and die of dehydration. Trenches should be one to two feet deep and six to 24 inches wide at the top. They can be U or V shaped with sidewalls sloping at angles between 65 and 90 degrees. Level the crown at the top of the trench and line the trench with mulching plastic. For a more detailed description, see video (Reference 99). Summer adults may likewise be trapped as they disperse from the potato fields to their overwintering sites. Harvest Postharvest Scheduling vine killing/harvest as soon as the crop is mature eliminates the food source for the Colorado potato beetle and reduces the number and health of overwintering adults. Flooding (which occurs naturally on many muck fields) can reduce overwintering populations. At the time this guide was produced, the following materials were labeled in New York State for managing this pest and were allowable for organic production. Listing a pest on a pesticide label does not assure the pesticide’s effectiveness. The registration status of pesticides can and does change. Pesticides must be currently registered with the New York State Department of Environmental Conservation (DEC) to be used legally in NY. Those pesticides meeting requirements in EPA Ruling 40 CFR Part 152.25(b) (also known as 25(b) pesticides) do not require registration. Current NY pesticide registrations can be checked on the Pesticide Product, Ingredient, and Manufacturer System (PIMS website) http://pims.psur.cornell.edu/ (Reference 3). ALWAYS CHECK WITH YOUR CERTIFIER before using a new product. Table 15.1 Pesticides Labeled for Management of Colorado Potato Beetle Class of Compounds Product Name (active ingredient) Product Rate FOLIAR AND SOIL APPLIED TREATMENTS BIOLOGICALS PHI (days) REI (hours) Efficacy Comments Entrust Naturalyte Insect 1-‐2 oz/A 7 4 1 Spinosad based products effective in 14/14 trials. Very good 622012
ORGANIC POTATO PRODUCTION Table 15.1 Pesticides Labeled for Management of Colorado Potato Beetle Class of Compounds Product Name (active ingredient) Product Rate PHI (days) REI (hours) Efficacy Comments Control 80W (spinosad) control of all larval stages but no control of adults or eggs. Mycotrol O (Beauveria bassiana) BOTANICALS Azadirachtin 1/2 – 1 qt/A Up to day of harvest Aza-‐Direct 1-‐2 pints/A 0 4 1 AzaGuard 8-‐16 fl oz/A 0 4 1 4 2 Beauveria based products effective in 2/7 trials. For use against 1st and 2nd instar larvae. Ineffective against large larvae and adults. Nontoxic to predators and parasites. Does not provide immediate mortality. Foliage contact and coverage extremely important. UV sensitive. Most effective in moist environments. Azadirachtin based products effective in 3/3 trials. Consult label for application timing. Best control is achieved at the upper end of the use range. Does not provide immediate mortality. Intoxicated nymphs and larvae die at their next molt. Foliage contact and coverage extremely important. AzaMax 1.33 fl 0 4 1 oz/1000 ft 2Azatrol 0.11-‐0.22 fl oz/1000 ft2 0 4 1 Ecozin PLUS 1.2% ME 15-‐30 oz/A 0 4 1 Molt-‐X 8 oz/A 0 4 1 For Molt-‐X, use in combination with an organic 0.25-‐1% nonphytotoxic crop oil in sufficient water to cover undersides of leaves. Neemix 4.5 7-‐16 oz/A -‐ 12 1 Neemazad 1% EC 18 -‐72 fl oz/A -‐ 4 1 Target nymphs and larvae. Garlic BioLink (garlic juice) Garlic Barrier (garlic juice) Pyrethrin Pyganic Crop Protection EC 1.4 II (pyrethrins) 0.5-‐2 qts/A -‐ -‐ ? 25(b) pesticide 1gal/99 gal water mix, spray at 10 gal mix/A -‐ -‐ ? 25(b) pesticide 16 – 64 fl oz 0 12 1 Pyrethrum based products effective in 3/3 trials. Pyganic Crop Protection EC 5.0 II (pyrethrins) Soap Safer Brand #567 Pyrethrin & Insecticidal Soap Concentration II (pyrethrin & potassium salts of fatty acids) 4.5-‐18 fl oz/A 0 12 1 Pyrethrum based products effective in 3/3 trials. Target first instars. Foliage contact and coverage extremely important; UV sensitive. 1:20 dilution using 1 gal mixed spray/700 ft 2of plant Until spray has dried 12 ? 632012
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