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The Pros & Cons of Pesticides & Fertilizers

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The Pros & Cons of Pesticides & Fertilizers

Pesticides and fertilizers, both natural and synthetic, have pluses and minuses; They kill harmful pests and help plants grow but can be toxic and hard to use.

Whether you use organic or inorganic fertilizers and pesticides, your plants will reap numerous benefits if you use the products properly.
Your decisions about whether or not to use plant food or pesticides, and what types of products to use, have as much to do with rewards for plants as they do with environmental sustainability, cost and ease of use.
Fertilizers
Fertilizers come in a number of combinations, each with its own set of advantages and disadvantages. Choose from:
Simple, or incomplete, fertilizers with only one or two nutrients, such as nitrogen or potassium
Complete fertilizers that typically include nitrogen, phosphorus and potassium in various percentages
Special blends for specific types of plants, such as acid-loving or fruiting plants
Inorganic fertilizers made from synthetic substances
Organic, also called natural, fertilizers made from manure, fish emulsion or kelp, among other living or dead materials
Pros
No soil is perfect for every plant. So fertilizers of all types provide additional food in the soil, keeping plants healthy, vigorous and fruitful.
With either a special blend or simple fertilizer, you can target the needs of a specific plant by giving it just the nutrients it requires.
Synthetic fertilizers allow plants to absorb nutrients more quickly than they would from unfertilized soil or from natural fertilizers.
The dry forms of synthetic fertilizers typically cost less than organic fertilizers.
Some synthetic fertilizers have timed-release features.
New growth and stronger stems sometimes occur within days when you spray seaweed fertilizers.
Cons
Warning
The chemicals in synthetic fertilizers can wash into waterways if you apply too much or overwater. Be meticulous in following directions so you do not pollute your the environment.
Too much fertilizer can kill plants -- a problem more common with synthetic fertilizers than organic types.
Fresh, non-composted manure can kill plants because it contains salts.
Non-composted manure frequently contains weed seeds.
It's oftentimes difficult to calculate how much fertilizer to add to plants or lawn because you need to determine square footage and match that to the number of gallons recommended by the fertilizer manufacturer.
All fertilizers cost money, with organic ones sometimes costing more than synthetic varieties.
Synthetic fertilizers sometime cause crusting on the soil surface.
Tip
Follow the integrated pest management protection system before using pesticides. Use the least hazardous practices and products to see if they work:
Buy disease-resistant plants.
Try physical barriers, handpicking snails and trapping aphids.
Use biological controls, such as releasing lady beetles, commonly called
ladybugs, to eat aphids.
Pesticides
Although some garden plants are resistant to harmful insects and diseases, many are not and need protection. When barriers and biological controls don't work, try these pesticides:
Synthetic fungicide to combat plant diseases such as powdery mildew, rust and molds
Insecticide to kill insects and other small pests
Herbicide to kill weeds
Natural products such as baking soda, copper soaps, bacteria that target insects, sulfur dust or neem oil, which is a pesticide made from a tree.
Pros
Synthetic pesticides and natural products effectively kill bugs and diseases most of the time.
Natural products are less toxic overall than synthetic ones but still can be toxic to a degree.
Some natural oils kill disease spores in addition to insect eggs or larvae.
Cons
Some pesticides are toxic to humans, pets, beneficial insects or other plants in greater and lesser degrees. Reading a product's warning label will let you know how safe the product is.
Toxic pesticides have specific storage and disposal regulations you must follow.
Determining the amounts of pesticides to use is tricky; they can be ineffective if you use too little or can kill plants if you use too much.
Most pesticides need to be applied more than just one time.
For more information on using pesticides and fertilizers, see "Excessive Use of Fertilizers & Pesticides."

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