INSECTICIDES: Their Toxocity

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

Article Blog   Article Index
For a list of 197 poisons, their use and toxicity, cross references to other names, their LD-50 dose in mg., and the routes they take to poison people, refer to A66-881+; N364+
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Insecticides

Insecticides Comments
INSECTICIDES: Best Ones Sevin 80% recommended; a wettable powder sprayed or dusted monthly; controls scale, mealy-bug and others including bush snails. OD73-139 0
INSECTICIDES: Emulsifiable Concentrate (e.c.) A creamy liquid; if free oil droplets float on the prepared mix the emulsion has broken down and must be discarded. SA84Dec-135 0
INSECTICIDES: Expensive Little Packages The smallest available package of Mesurol WP which is frequently recommended, is 1,5Kg at the price of NZ$124.00. NZ86-193 0
INSECTICIDES: Guidelines on Their Application Apply them only when the sun is down; when the foliage is dry and the pots wet; use those products which are least toxic to humans; use wettable powders for all concerned; take precautions from first to last; use a follow-up spray, or whatever, to deal with hatched eggs. OIE85My-14 0
INSECTICIDES: Harmful Sprays Species that can be damaged when in tender new growth include catasetums, cycnoches and mormodes. ODA77(4)-5+ 0
INSECTICIDES: In the Home Spray plants in the kitchen with Malathion which is as safe as any broad-spectrum insecticide can be; it is volatile and smells unpleasantly. A74-433Spray plants under lights in the basement with malathion, 1 to 1.5 tpg. RMH 0
INSECTICIDES: In the Home, for Spraying Use a clear plastic garbage bag about 30 inches by 40 inches; place layers of newspaper on bottom of lengthwise bag; place problem plants inside up to a dozen or so; use a sprayer with plastic opening closed tightly over the spray end; spray with insecticide; leave 1/2 hour; remove plants using rubber gloves; destroy bag and paper. ODA69-112 0
INSECTICIDES: Miticide Included Diazinon and Cygon are both excellent for insects including mites; Cygon has been reported as injurious to lycastes; test both of them first: Diazinon 50WP at 1 tpg., Cygon 2E at 1 to 2 tpg. A74-1062 0
INSECTICIDES: Not Effective Insects may have become resistant to a particular chemical, so speak to your agricultural agent; the chemical may have bben on the shelf too long as they sometimes deteriorate rapidly; the pH of the hose water used may be above neutral (7.0) when it should be between 4.5 and 5.5 (acidic) to be neutral. F81-125 0
INSECTICIDES: Not Specifically Recommended for Orchids Manufacturers do not try their products on all plants; if recommended for orchids and harm follows a damage suit could arise; Cygon was developed for some other control; it has harmed broughtonias; but is not necessarily harmful to others; sale is restricted in some places. F76-85 0
INSECTICIDES: Organic Dusts for Thrips Rotenone, Pyrethrums, Ryania, etc., are not as good as Malathion, plus a sticker-spreader. A80-1141 0
INSECTICIDES: Products Registered for Use on Orchids A list with those pests attacked, with dosage recommended; refer to AH86-62 0
INSECTICIDES: Prophylactic Spraying Overuse of deterrent sprays is not recommended because it encourages development of resistant strains of pests; it is best to treat each problem as it arises. A85-866 0
INSECTICIDES: Recommended Aramite, Cygon 2E, Malathion, Plant Fume. OD67-50 0
INSECTICIDES: Rubbing Alcohol Recommended for use on mealybugs, soft scale and possibly others, do the top and bottom of leaves as a spray; it quickly dessicates the pests. OIE86Sept-15 0
INSECTICIDES, SYSTEMIC: For Red Spider Use Murphy Systemic System Insecticide twice at a ten-day interval followed three weeks later by two further sprays of PBISystemic Insecticide, then monthly thereafter alternating the two; effective also on scale and mealybug. OR81-198 -- sprays = they are absorbed into the plant sap, like foliar feeding; they are usually effective but may have undesirable side-effects on such as phalaenopsis, paphiopedilums, small plants and plants in bud; they have a long residual action. SA84Dec-135 0
INSECTICIDES: Toxicity Expressed in LD-50 (Lethal Dose for 50% of animals on which it was tested) plus a dose number, the lower it is the more lethal; examples: Chlordane 475 to 590; chlorobenzilate 3,100; Cygon 2E 215 to 245; Demeton .7 to 7.5; Diazinon 150 to 220; dimethoate 215 to 245; Dimite 500; Dithio Smoke 5; Guthion 15; Kelthane 575; Malathion 1,000 to 1,375; metaldehyde 630 to 1,000; Pano Drench 5; Panogen 5; Pyrethrum "low"; Sevin 400; Zectran 15 to 63. A73-712 0
INSECTICIDES: Wettable Powders (w.p.) Contact sprays with W.P. are often safer to use because less easily absorbed by both humans and plants; they are effective where they are carried by water droplets so a sticker/ spreader/wetting agent when added results in a more efficient treatment. SA84Dec-135 0
INSECTICIDES: When Not to Use In Florida never apply them when the temperature exceeds 85 or 90 deg.F.; spray in the late afternoon to avoid much injury to plants. DK23Never use them on wet foliage, or when the sun is shining on the plants. A68-589 0

New Topics

  1. James W McCully asked question How to read archived articles ? in category General Discussion
  2. David George asked question recently purchased orchid - what to expect in category General Discussion
  3. Danielle Carbonneau asked question phalaenopsis, dendrochum and Odontoglossum in category Phalaenopsis
  4. Nicholas Filannino asked question Phalaenopsis William Kistler? in category General Discussion
  5. Mark Farran asked question How to open and read articles listed in category General Discussion
Ask a Question

Start a Topic

New Comments

  1. Louis Wilson commented on member plant E. alata f. alba by Louis Wilson
  2. Julie Ellner commented on member plant Phal. amabilis var. formosanum by Vickie Seibert
  3. Julie Ellner commented on member plant Rlc. Green Dragoon 'Mendenhall' by Jeanne Uzar Hudson
  4. Danielle Carbonneau commented on member plant Ons. Catatante 'Los Roble' by Henry Shaw
  5. Barry J Silver commented on orchid Lyon. SunCoast Pink Passion
  6. Carol Holdren commented on topic "Phalaenopsis William Kistler?" by Nicholas Filannino
  7. Carol Holdren commented on orchid Colm. Eric Gabriel Heines
  8. Carol Holdren commented on topic "Cattleya little susie" by Juliann Eckhard
  9. Carol Holdren commented on member plant Bc. Morning Glory by Chris Siolo
  10. R .Benson commented on member plant Kir. New Hybrid (Fred Clarke) SVO9831 by R .Benson
  11. Carol Holdren commented on topic "Blooming Stenglottis Venus “jamboree “" by John Urey
  12. Jeanne Uzar Hudson commented on member plant Lc. Canhamiana var. coerulea 'Cobalt' by Jeanne Uzar Hudson
  13. Jeanne Uzar Hudson commented on member plant Sns. gemmata by Jeanne Uzar Hudson
  14. Stefan Neher commented on topic "Orchid roots .com site?" by Mary Lane
  15. Kevin Barry commented on member plant Bul. Tammie Sue Pernas by Tony Pernas
  16. Linda Hartman commented on member plant Ctt. Final Blue by Linda Hartman
  17. Kevin Bergeson commented on member plant Paph. rothschildianum by Kevin Bergeson
  18. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  19. Michael Makio commented on orchid V. Beatrice Makio
  20. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott