- Author: Cheryl Reynolds
UC Statewide IPM Program
November has arrived, and before you know it we'll be ringing in 2018! For those who hold a license or certificate from the Department of Pesticide Regulation (DPR), and have a last name starting with the letter M through Z, this is your year to renew.
DPR is urging license and certificate holders to mail in applications now to avoid late fees and to allow enough time for processing so that you can receive your new license or certificate by the beginning of the new year. Renewing early gives DPR time to notify you if you are short any continuing education (CE) hours and allows you time to complete any additional CE courses without having to retest.
If you need more hours to complete your renewal application and don't have time to attend an in-person meeting, then check out the online courses available from the UC Statewide IPM Program (UC IPM).
The following UC IPM and UC Agriculture and Natural Resources online courses have been approved by DPR and are available whenever and wherever you want to take them.
Laws and Regulations
- Proper Pesticide Use to Avoid Illegal Residues (2 hours) $40.00 charge
- Providing Integrated Pest Management Services in Schools and Child Care Settings (1 hour Laws and Regulations and 1 hour Other)
- Citrus IPM: California Red Scale (1 hour)
- Citrus IPM: Citricola Scale (1 hour)
- Citrus IPM: Citrus Peelminer (1 hour)
- Citrus IPM: Citrus Red Mite (1 hour)
- Citrus IPM: Cottony Cushion Scale (1 hour)
- Citrus IPM: Forktailed Bush Katydid (1 hour)
- Pesticide Application Equipment and Calibration (1.5 hours)
- Pesticide Resistance (2 hours)
- Tuta absoluta: A Threat to California Tomatoes (1 hour)
- Urban Pesticide Runoff and Mitigation: IPM – Pesticide Properties (1 hour)
- Urban Pesticide Runoff and Mitigation: Impact of Pesticides - Urban Pesticide Runoff (1 hour)
- Urban Pesticide Runoff and Mitigation: Water Quality and Mitigation: Bifenthrin and Fipronil (1 hour)
- Urban Pesticide Runoff and Mitigation: Herbicides and Water Quality (1 hour)
For those of you with last names A through L (or those of you who want to get a jump on your CE hours), look for new online courses from UC IPM coming in early 2018.
View the list of all DPR-approved online or in-person courses. For more information on the license and certification program and renewal information, visit the DPR website.
For more information about pest management and other training opportunities, see the UC IPM website.
- Author: Ben Faber
I was just speaking to a group of Certified Crop Advisors and there was some confusion about the units used by different labs to report their results, so I put together this sheet to help understand the relationship between the different terms. They are usually interchangeable, but one needs to know how they convert between each other. So here is a cheat sheet.
Common ions in water: calcium (Ca2+), magnesium (Mg2+), sodium (Na1+)
sulfate (SO42-), chloride (Cl-), carbonate (CO32-), bicarbonate (HCO3-), boron (H3BO3)
Measured as parts per million (ppm) or milligrams per liter (mg/l), which are interchangeable , or milliequivalents per liter (meq/l). A milliequivalent is the ppm of that ion divided by its atomic weight per charge.
Example: Ca2+ with atomic weight of 40 and a solution concentration of possibly 200 ppm. Ca2+ has two charges per atom, so it has a weight of 20 per charge. 200 ppm divided by 20 = 10 meq of calcium for a liter of water.
Total Dissolved Solids (TDS): measure of total salts in solution in ppm or mg/L
Electrical Conductivity (EC): similar to TDS but analyzed differently.
Units: deciSiemens/meter(dS/m)=millimhos/centimeter (mmhos/cm)=
1000 micromhos/cm (umhos/cm).
ConversionTDSEC: 640 ppm=1 dS/m= 1 mmhos/cm=1000 umhos/cm
Hardness: measure of calcium and magnesium in water expressed as ppm CaCO3
pH: measure of how acid or base the solution
Alkalinity: measure of the amount of carbonate and bicarbonate controlling the pH, expressed as ppm CaCO3.
Sodium Adsorption Ratio (SAR): describes the relative sodium hazard of water
SAR= (Na)/((Ca+Mg)/2)1/2, all units in meq/l
1.5 feet of water with EC of 1.6 dS/m adds 10,000 # of salt per acre
and that same water with 20 mg/l of nutrient will supply 80# of that nutrient/acre
Sea water has ~ 50 dS/m, 20,000 ppm Cl, 10,000 ppm
Irrigation water WATCH OUT- 1,000 ppm TDS, 100 ppm Na/Cl, 1 ppm B