Advantages and Disadvantages Of Well-known Agrochemicals
by Wgq Dark 057186626465When a farmer is faced with a problem affecting his crop, he must first identify the source. Manual or machine-assisted weeding can solve some problems. Other problems may require the use of agrochemicals. Many global farmers rely on the different types of agrochemicals on the market.
Insecticides
Insecticides are common type of agrochemical
used which are applied in a variety of ways, from sprays to slow-release
diffusion. Their purpose is to target destructive insects and either kill them
or otherwise force them away from crops. Organophosphates are one type of
insecticide that interferes with the transmission of nerve impulses in insects.
These cause insects to convulse or even become paralyzed. Pyrethroids are
another type that has similar results. These include some of the most toxic
insecticides, however. Insect growth regulators are a safer type of
insecticide.
Herbicides
An herbicide is popularly used agrochemical
that is meant to kill weeds that pose a danger to farming crops. There are three
types of herbicides: pre-plant, pre-emergence and post-emergence. These are all
terms related to when the herbicide should be applied, either before a crop is
planted, before it sprouts or after it has grown. Variables that affect what
type to use include the type of crop it is applied to, the species of weed that
is targeted, soil type, climate conditions and the chemical nature of the
particular herbicide. Glyphosate, a type of pre-plant herbicide, is good for
killing weeds in bare fields. These herbicides typically kill all plants,
though, not just weeds. Butachlor is a type of pre-emergence herbicide. These
should be chosen so that they don't affect the crop in question and are
typically applied to the soil surface. Post-emergence herbicide, like 2,4-D,
should be applied directly to weeds.
Advantages
The primary reason that farmers and gardeners
use chemicals is to grow bigger fruits, bigger vegetables or brighter flower
blooms. Fertilizing agrochemicals such as diallylamine(C6H11N,
also called as Di-2-propenylamine) inject much needed nutrient chemicals, such
as nitrogren or potassium, directly into the soil to help plants grow. Different
types of herbicides kill unnecessary weeds, allowing only the plant of choice to
grow without competition for food.
Disadvantages
Nitrogen is often regarded as a highly
effective and cheap fertilizer. However, repeated use of the chemical can cause
an imbalance in the pH of the soil, eventually rendering it useless for growth
of any kind. Many agrochemicals are highly dangerous to humans and animals in
their concentrated forms. For example, ammonia in low concentrations is
generally harmless to humans, but high concentrations of the gaseous fertilizer
anhydrous ammonia can drift over long distances and prove fatal to human.
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Created on Dec 31st 1969 18:00. Viewed 0 times.