Plant health depends on the continual addition of new organic matter to the soil and on the formation and breakdown of humus. As soil microbes and earthworms convert fallen leaves and other residues into humus, they also release plant nutrients and secrete gums which bind soil into stable crumbs, giving it a porous structure.
Organic soil fertility is built up and maintained by the use of such practices as crop rotations, cover crops, and green manuring, composting, mulching and the application of manure, organic fertilizers and soil amendments. A healthy organic soil teems with microbial life and has a high organic matter content, good tilth and a balance of plant nutrients and minerals.
PLANT DISEASE MANAGEMENT
There are three basic principles to disease prevention:- Building a healthy soil, rich in organic matter, with balanced nutrients, elements and pH. This promotes strong, vigorous plant growth and assures the availability of trace elements such as boron, copper, iron, manganese, magnesium, molybdenum and zinc. Trace elements are vital to the growth of healthy plants. If trace elements are deficient or unbalance, cell structure breaks down, inviting disease.
- Using well adapted and resistant varieties. This includes the use of certified seed, and seed and stock from reliable, disease-free sources.
- Using disease-prevention cultural practices such as the elimination of host weeds, diseased plants or parts of plants; the removal, composting, or digging under of crop residues; insect control, crop rotations, hot water seed treatment, interplanting, companion planting and harvesting crops when dry; careful cultivation to minimize mechanical damage to plants; and good air circulation.
INSECT MANAGEMENT
The most important practice which organic growers can undertake to limit pest problems in their crops is to develop soil fertility. Healthy soil grows healthy plants. Some measures which encourage plant health and reduce pest problems: composting, crop rotations & green manures, polyculture (planting a number of crops within a limited area), timely plantings with an eye to pest life cycles, the use of species and varieties adapted to local soil and climatic conditions, the use of trap crops and resistant varieties and the protection or release of natural predators.APPROVED SOIL AMENDMENTS, FERTILIZERS, GROWTH PROMOTERS
Agricultural limestone, any brandAgricultural gypsum - any brand
Animal manures, composted - any brand
Blood products - any brand
Borax Ground basalt
Bone meal - any brand
Biodynamic preparations - any brand
Calcitic Limestone
Cellulotic bacteria or other compost inoculants (for composting resistant materials)
Colloidal phosphate - any brand
Compost (on-farm produced)
Dolomitic limestone
Feldspar - any brand
Fish emulsion, non-fortified - Menhadden Fish Solubles,Fertrell Fish Emulsion #1, Cor-J Seafood, FoliaFish
Fish meal, non-fortified - any brand
Free-living nitrogen fixing bacteria, bluegreen algae, mycorrhizae and other beneficial microbial cultures
Granite dust or other rock dust products - any brand
Gypsum (calcium sulfate, only if mined)
Greensand - any brand
Herbal preparations including the biodynamic preparations
Humates
Kelp Meal - Algit, Thorvin
Kelp Extracts non-fortified - Maxicrop, Sea Crop, Fertrell Foliar Feed #3, Foliagro, Sudbury, Agri-kelp
Manure teas
Natural potassium sulphate - any brand
Oyster shell - any brand
Rhizobium inoculants for legumes
Rock Phosphate - any brand
Rooting hormones -- naturally occurring only (including auzin -- IAA)
Seaweed extracts containing natural cytokinins
Seaweed meal or seaweed extract (foliar)
Solubar
Sulphate of potash magnesia (langbenite, sul-po-mag, k-mag) - any brand
Vegetable meal ex: alfalfa meal, soy meal - any brand US or Canadian grown (Cottonseed meal is regulated due to suspected residues)
Wetting agents, adjuvants and spreader stickers which are plant or fatty acid based.
Wood ashes in moderation - any brand (High rates may over lime the soil, increase salinity and damage soil life)
NOTE: Vermiculite and Perlite (volcanic rock) can be used to lighten the soil & help retain moisture as can peat moss. Be aware that peat moss is a limited resource and being used less and less. Other than lightening and maybe slightly acidifying the soil there is little benefit.
REGULATED SOIL AMENDMENTS, FERTILIZERS, GROWTH PROMOTERS
Chilean Nitrate or bat guano (Discouraged because of high sodium content)Epsom salts (If soil is high in both Ca and K while Mg is deficient)
Vegetable meal originating outside US or Canada (ie cocoa meal) (Must test for residues)
Potassium sulfate
APPROVED PEST/DISEASE CONTROL APPROVED PEST/DISEASE CONTROL
Mechanical Measures: nets, traps, hand picking, lights, noise, vacuuming, jets of water, physical barriers, trapping substances such as Tanglefoot or Stickum, and tree seals without fungicides or chemical pesticides added.Pheromones and attractants used either to monitor or control pest populations.
Biological controls:
- Bacterial and viral-specific insecticides such as Bacillus thuringiensis (BT), formulated
- with chemically inert ingredients and no petroleum based synergists.
- The release of natural predators and parasites -- lady bugs, lacewings, Encarsia formosa, Trichogramma wasps, predatory nematodes, etc.
- Creation of favorable environments for wildlife and other natural predators such as birds, frogs, toads, snakes, etc.
- Domestic predators -- geese, chickens, etc.
- Sprays and Dusts: Plant derived sprays and dusts (unless listed elsewhere as regulated or prohibited) -- mild and non-poisonous sprays such as nettles (useful against whitefly and aphids) or garlic, also hot peppers.
- Insect derived sprays such as essence of Colorado potato beetle, etc.
- Dusting with lime and wood ash (If it rains, wood ash makes lye and can burn seedlings)
Biodynamic preparations - any brand
Boric Acid
Botanical repellents - garlic & cayenne
Herbal preparations - equisetum
Natural acids - vinegar - any brand
REGULATED PEST CONTROL
Insecticidal soaps - Safers, M-Pede (Can result in plant damage and reduced yields)Diatomaceous earth (Applicator should take care to protect lungs. Can damage many beneficial species, including earthworms.)
Rubbing alcohol for greenhouse use - any brand (Can be phytotoxic. Find lowest effective concentration by testing on a few plants first.)
Botanical Pesticides: Pyrethrum, Rotenone, Sabadilla, Ryania, Quassia (These products are extremely toxic and can be dangerous to humans, wildlife and soil organisms. They are also broad spectrum poisons which kill beneficials as well as pests. They should be used with discretion and not on a routine basis. Proper body protection should be used by the applicator.)
PROHIBITED
Pesticides found in either the allowed or regulated categories are prohibited if they contain xylene, toluene, benzene or other aromatic petroleum distillates. A more complete list of NOFA-prohibited substances can be found on the bulletin board of the Shed.NEW ISSUE
The use of genetically altered seeds is also prohibited.ACCEPTABLE/UNACCEPTABLE PRODUCTS
Per Howard Garrett and the TEXAS ORGANIC RESEARCH CENTER TORC 2007In general: Toxic synthetic pesticides are specifically prohibited, i.e., neurotoxins including all carbamates, organophosphates, pyrethroids, organochlorines and all products containing piperonyl butoxide (PBO). Certain toxic organic pesticides are also excluded.
Acceptable Organic Soil Amendment and Fertilizer Products
Bioform ProductsBradfield Products
Coffee grounds
Compost
Composted biosolids
Corn gluten meal (60% protein or 9-0-0 analysis)
Granite Native cedar products
Cornmeal products
Cottonseed meal
Diatomaceous earth (natural)
Dry molasses
Earthworm castings
Fish emulsion and fish meal
Garrett Juice
Garden-Ville Soil Conditioner
Garden-Ville Products (except those containing urea)
Greensand
GreenSense Products
Hu-More Products
Hou-Actinite
Humates
Humic acid products
Lava sand
Medina Products
Seaweed products
Texas greensand
Vinegar (apple cider and other fruit-based products)
Volcanite
Wheat bran products
Zeolite
Unacceptable Fertilizer Products
Ammonium nitrateAmmonium sulfate
Miracle-Gro Synthetic fertilizers
Osmocote
Peters 20-20-20
Synthetic growth regulators
Synthetic weed & feed fertilizers
Urea
Acceptable Organic/Natural Pest Control Products
Bactimos briquettesBaking soda
Beneficial insects
Beneficial nematodes
Bioblast
Biological products
Bora-Care
Borate products
Boric Acid
Cedar-Cide products
Cinnamon products
Citrex
Citric acid products
Citrus products
Clove oil
Cornmeal products
D-limonene
Diatomaceous earth (natural)
Eco PCO D
Eco PCO Exempt
Eugene oil
Garden-Ville Soil Conditioner
Garlic tea products
Garlic pepper tea
Glue traps
Horticultural oil
Hydrogen peroxide
Insecticidal soap
Live traps
Mosquito Dunks
Neem
Niban (without PBO)
Orange oil
Pepper products (red and black)
Plant Wash
Spinosad
Tim-Bor
Vinegar (from grain alcohol, not distilled from 99% glacial acetic acid)
Unacceptable Pest Control Products
2,4-DAcetic acid (petroleum based)
Amdro
Atrazine
Bayleton
BHA
BHT
BR-61
Broadleaf herbicides
Clopyralid
Copper products
Daconil
Diazinon
DSMA
Dursban
Enviro RainDrops
Ethoxyquin
Finale
Funginex
Glyphosate products
Grazon
Ironite
Manage
Merit
MSMA
Nature's Creation Organics
Orthene
Orthonex
PBO
Pendimethalin
Picloram
Piperonyl butoxide
Rotenone
RoundUP
Silica gel
SU herbicides
Synthetic fungicides
Tuffalo
Brand names are included by NOFA as a service to growers and do not imply endorsement. All possible brand names are not listed.
Excerpted from 1995 NOFA-NY and 1998 NOFA-MA
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