EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
Effects of pH on Pesticides
Sometimes we have a trouble controlling a pest with a pesticides.What is problem, maybe your pest resistance or maybe chemical itself.In our city most of people work with agriculture who have that problem.We investigated this problem and found that pH of water directly effect our pesticides efficiency. Some pesticides can decompose quite rapidly in water with a high pH (greater than 7). Much of the active ingredients may be neutralized by a reaction called Alkaline Hydrolysis, in which the pesticide molecule is split by the water and converted to an inactive form. Decomposition rates are determined by the individual chemical; each compound's rate is different. Usually the more alkaline the solution, the faster the rate of decomposition is.
We took some water sample from our irrigation water sources and rivers then measured the pH.Then we found and used some methods to adjust our irrigation water for effective uses of pesticides on our farm areas.
Purpose of project:
Increase the effect pesticides by adjusting water pH. Decrease the cost of disinfestations and prevent negative effects of pesticides on our food and drinking water. As a result we want to get back money, time, fresh food and our environment.
USED INTRUMENTS
Samples of river waters and irrigation sources.
PH meter and litmus papers
Titration tools
HNO
3
HCl
Citric acid
H
2
SO
4
CO
2 tank

Furadan
Guthion
Imidan
Lorsban
Malathion
Monitor
Pounce
Admire
Ambush
Cygon
Cymbush
Diazinon
Dibrom
Dimethoate
Di-syston
EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
Insecticide Optimum pH
5.0
5.5
4.0
5.0
5.5
5.0
5.0
7.0
5.0
5.0
5.0 not determined
4.0
4.0
4.0
3 weeks
48 hours
1 hour
7 hours
3 days
12 hours
4 hours
1.5 days
Alkaline
(pH 8-9)
Half-life of Insecticides at varying pH's
Neutral
(pH 7)
Acidic
(pH 4-6)
Stable
Unstable
48 min
35 hours
Stable
Stable
12 hours
Stable
Stable
Stable
21 hours
Stable
5 hours
Unstable
42 days
10 weeks
Stable
12 hours
32 hours
Stable
10 days
12 hours
Stable
3 days
Stable
Stable
8 days
Stable
Stable
2 weeks
Stable
20 hours
60 hours
Stable
17 days
13 days
Stable

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
Introduction:
There are many investigations about affect of water pH on pesticides. Main problem how water effect pesticides. Water which we are using with pesticides is generally hard water mean containing Mg and Ca carbonates salt has high pH. Water pH is a critical factor in the effectiveness of many pesticides and growth regulators. Many materials work best when mixed in water that is acidic while a few perform best in a neutral or higher pH. Pesticides such as organophosphates, synthetic pyrethroids, carbamates, chlorinated hydrocarbons, undergo a chemical reaction, called hydrolysis that causes them to break down in water with a pH greater than 7.0. The more alkaline the water, the more rapidly the pesticide breaks down. The hydrolysis can be very fast when the pH of the water is greater than 8 and 9. For every unit increase in pH, the rate of hydrolysis increases 10 times. Some pesticides begin to break down as soon as they are combined with water with high pH. In our city Tursunzade that is not investigated. In this project we want to increase the affect of pesticides in our farm areas. We hear many complaints about ineffectiveness of pesticides from farmers. In our city agriculture is main pipe line and as you know without winning war against to pesticides, taking a good yield is impossible. Our aim is this.

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
METHOD
In our project, we took many samples from rivers and irrigation water sources. Than these samples’ pH were determined to find suitable pH scale. But observed that many sources have more pH than needed optimum pH range. We tried to make our samples’ pH in suitable range by using titration method. Generally we use harmless reagents which are citric acid (known as lemon acid), HCl (commercially sold as muriatic acid), H2SO4 (accumulator acid) and HNO
3.
We made experiment for each acid and measured pH of samples. The use of carbon dioxide
(CO2) as an alternative to liquid and dry acids has recently become a popular method for lowering pH of pool water. When CO2 is dissolved in water it forms a mild acid compound and reduces pH.

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
CONCLUSIONS AND EXCHANGE OF OPINIONS :
In our experiments we observed the changing of pH with addition of acids. As a result decreasing of pH increased the effectiveness of pesticides which help to keeping time, money and Environmental pollution. If we can explain this investigation to our farmers we can achieve a big environmental problem by using very simple method. Because the cost of acids and pH meter (approximately 20 $) are very cheap. Anybody can adjust pH of water of pesticides easily. In the following part we show some simple devices which can be used as pH adjuster and also pH meter cheaply.

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
Commercial Ph Adjuster Cheap and Useful

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER
Sources:
Bailey, D. and T. Bilderback. Alkalinity Control for Irrigation Water Used in Nurseries and
Greenhouses. North Carolina State University . Cyberconference: Water quality. http://www.greenbeam.com/cyberconference/irr-alkalinity.html
Insect Control Guide. 2002. Cooperative Extension Service, LSU Agricultural Center , Louisiana
.http://www.lsuagcenter.com/Subjects/guides/pests/01pest.htm#intro
Lamboy, J. S. 2000. Alkaline Degradation of Pesticides. New York State Integrated Pest
Management Program, Cornell University , NY . Online publications http://www.nysipm.cornell.edu/publications/alk.deg.html
Murphy, G. 2004. Water pH and its Effect on Pesticides. Ministry of Agriculture and Food
Ontario , Canada . http://www.gov.on.ca/OMAFRA/english/crops/hort/news/grower/2004/08gn04a1.htm
Pasian, C. 2004. Spray Solution pH. The Ohio Sate University Extension, Ohio Floriculture
Online 11(3). http://floriculture.osu.edu/archive/apr04/SpraySolutionPH.html
Yates, R. 2003. Water Quality Effects Pesticide Effectiveness. The Griffin Gazette spring issue. http://www.griffins.com/gazette/2003_spring/spring_2003_tech_tips.html
1998 Ohio Vegetable Production Guide, Bulletin 672.
Michigan State University Extension, Fruit CAT Alerts - 05079602.
PEI Dept of Environment.
Wilbur-Ellis - Ideas to grow with; Factsheet.

EFFECTIVE USES OF PESTICIDES BY ADJUSTING Ph of WATER