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ORGANIC POTATO PRODUCTION Table 15.10 Pesticides Labeled for Management of Spider Mites Class of Compounds Product Name (active ingredient) Product Rate PHI (days) REI (hours) Efficacy Comments M-‐Pede (potassium salts of fatty acids) SULFUR Kumulus DF (sulfur) Micro Sulf (sulfur) Microthiol Disperss (sulfur) OTHER Sil-‐Matrix (potassium silicate) 1-‐2% volume to volume 0 12 1 Soap based products effective in 2/3 trials. 3-‐10 lb/A 24 1 Elemental sulfur effective in 2/3 trials. Do not use within 2 weeks of oil applications. 5 lbs/A 24 1 Elemental sulfur effective in 2/3 trials. Does not provide immediate mortality. Foliage contact and coverage extremely important. 5-‐10 lbs/A -‐ 24 1 Elemental sulfur effective in 2/3 trials. 0.5-‐1% solution 0 4 ? Apply 20 gallons finished spray/A. SucraShield (sucrose octanoate esters) 0.8-‐1% vol to vol solution 0 48 ? Use between 25 and 400 gal of mix per acre. 59B PHI = pre-‐harvest interval, REI = restricted entry interval. -‐ = pre-‐harvest interval isn't specified on label. Efficacy: 1-‐ effective in half or more of recent university trials, 2-‐ effective in less than half of recent university trials, 3-‐not effective in any known trials, ?-‐ not reviewed or no research available . 15.11 Slugs and SnailsTime of concern: Early spring and fallKey characteristics: See Rothamsted HUslug controlUH publication.(Reference 121)Relative risk: Sporadic but wet weather and poorly composted organic matter favor population increase.Management Option Slug biology Molluscicide use Scouting Site selection Crop rotation Resistant varieties Sanitation Recommendation for Slugs and Snails Slugs and snails are similar in biology except slugs lack an external spiral shell. Pest species have up to 2 generations per year and eggs are laid in the spring and/or fall. Eggs deposited in the fall overwinter and hatch the following spring, usually in April and May. Slugs and snails thrive under the humid canopy of potato crops and can cause significant damage to tubers. Holes and cavities created by feeding of these mollusks are sometimes similar in appearance to (and confused with) that caused by soil arthropods such as millipedes, cutworms and white grubs. For best results, apply in the evening by broadcasting or by row banding to moist soil or after heavy rains. Avoid placing molluscide baits in piles. Low-‐lying areas and water-‐filled wheel tracks are excellent places to monitor for the presence of these pests during the period just preceding tuber sizing. Slugs and snails are general organic matter feeders; weedy potato fields and heavy moist soils may favor build-‐up of these pests. Potato crops following peas may be at greater risk of slug and snail attack in moist years compared to rotations following grains. Poorly drained soils, habitually wet areas of fields and weedy fields may be at greatest risk of infestation. No information on North American resistant varieties is available. Keeping land free of weeds may reduce the potential for infestation. 802012
ORGANIC POTATO PRODUCTION 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 15.11 Pesticides Labeled for Management of Slugs and Snails Class of Compounds Product Name (active ingredient) Botanicals BioLink (garlic juice) Garlic Barrier (garlic juice) Iron phosphate Bug-‐N-‐Sluggo® Insect, Slug and Snail Bait (iron phosphate and spinosad) Sluggo Slug & Snail Bait (iron phosphate) Sluggo-‐AG (iron phosphate) Product Rate PHI (days) REI (hours) Efficacy Comments 0.5-‐2 qts/A -‐ -‐ ? 25(b) pesticide 1gal/99 gal water mix, spray at 10 gal mix/A -‐ -‐ ? 25(b) pesticide 20-‐44 lbs/A 7 4 ? 20-‐44 lb/A 0 0 ? 20-‐44 lb/A 0 0 ? Apply by broadcast or by row band applicator in the evening to moist soil or after heavy rain. Do not place in piles. PHI = pre-‐harvest interval, REI = restricted entry interval -‐ = pre-‐harvest interval isn't specified on label. Efficacy: 1-‐ effective in half or more of recent university trials, 2-‐ effective in less than half of recent university trials, 3-‐not effective in any known trials, ?-‐ not reviewed or no research available 16. PESTICIDES AND ABBREVIATIONS MENTIONED IN THIS PUBLICATIONTable 16.2 Fungicides and Disinfectants Mentioned in this Publication. TRADE NAME ACTIVE INGREDIENT EPA REG. NO. ActinoGrow Streptomyces lydicus 73314-‐1 Actino-‐Iron Streptomyces lydicus 73314-‐2 Actinovate AG Streptomyces lydicus 73314-‐1 Agri-‐mycin 17 Streptomycin sulfate 55146-‐96 Badge X2 copper oxychloride, copper hydroxide 80289-‐12 Basic copper 53 copper sulfate 45002-‐8 Bio-‐Save 10 LP Pseudomonas syringae 81803-‐5 Camelot O copper octanoate 67702-‐2-‐67690 Champ WG copper hydroxide 55146-‐1 Clove oil clove oil Exempt-‐ 25(b) pesticide Contans WG coniothyrium minitans 72444-‐1 *Copper Sulfate Crystals copper sulfate pentahydrate 56576-‐1 CS 2005 copper sulfate pentahydrate 66675-‐3 Cueva Fungicide Concentrate copper octanoate 67702-‐2-‐70051 Milstop potassium bicarbonate 70870-‐1-‐68539 Mycostop Biofungicide Streptomyces griseoviridis K61 64137-‐5 Mycostop Mix Streptomyces griseoviridis 64137-‐9 Nordox 75 WG cuprous oxide 48142-‐4 NuCop 50DF copper hydroxide 45002-‐4 812012
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