Saturday, January 15, 2011
Masterbation With A Dolly
details that make a healthy crop
15/01/1911 - Clarin Rural
Monitoring water quality is vital to maintaining effectiveness in the application of pesticides.
For ClarÃn Rural Clarinrural@clarin.com
is a time of full emergence of pests, and taking into account that in many areas crops are stressed by lack of rainfall, they become more susceptible to adversity.
Daniel Leiva, INTA Pergamino specialist, prepared a report with considerations for preserving the integrity of plant protection products and prevent loss of effectiveness in applications.
By a quick count, the report notes that an average of 3 sprays per lot and 30 million hectares of arable land, the number of hectares treated per year is 90 million. Both
pesticides, herbicides and fungicides are applied water transport vehicle, and therefore this medium should be mainly stable. In this way, it avoids the structural disintegration of the active ingredients or products that certain chemical reactions, inactivation.
report says, water, by itself, is an aggressive medium for the product in its original container can be stored for 36 months, however, when it comes into contact with water, its effectiveness is committed only for a few hours or days. Leiva said that
is water quality which compromises the effectiveness of the product and thus is essential request a complete physical and chemical analysis of water in a specialized laboratory.
are five parameters to see once we have the results of the study: The pH, which represents a measure of acidity or alkalinity of organic matter in suspension, causing phenomena of adsorption of clay particles also produce adsorption, the presence of ions, cations (calcium, magnesium, iron and aluminum) and anions (sulphates, carbonates, etc..) and hydrolysis, the molecules break caused by the kinetic effect of water.
To prevent water pollution and application to amend the results of the analysis, specialist emphasized the sampling . In this sense "precautions are taken the tap water supply to the tank and not the tank, flushing and washing bottle several times," he said.
also recommended using plastic containers that have contained pollutant some water and added, finally, the most favorable time and place of sampling.
"The most appropriate time of year is summer without previous rains, and consequently there will be greater saline concentration and higher pH values," he said.
"The water quality varies significantly over short distances, therefore it is recommended to analyze all available sources of a field and, moreover, the value of this analysis is inexpensive compared to the costs of pesticides, added.
Each pesticide has a pH optimum to maintain its active ingredient, however, on average, can be considered a pH value equal to 5, concluded the article by Lewis.
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