Orchid doctor

INSECTICIDES: Not Effective

Ailments Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 2 years ago.

Article Blog   Article Index
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
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 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: Their Toxocity 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+ 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. Susan Makar asked question "Aztec Gold" in category General Discussion
  2. Alison Brown asked question BLC can anyone tell me the hybrid name in category General Discussion
  3. Al Gerard asked question Nitrogen levels? in category General Discussion
  4. Raina Steiner asked question Ellison Onizuka in category General Discussion
  5. Paph hsinying jewel x paph hsying jewel september 09 2018 Adrienne Alexander asked question How to add a not-listed plant in category General Discussion
New Comments
  1. Ba2b503c 4be9 4833 b247 39f8b3d131c1 Gerri Palmer commented on member plant Rlc. Jungle Green by Sharon Stretton
  2. Image Carol Holdren commented on member plant V. Pachara Delight var. Pachara Delight Pink by Frances LaVigne
  3. Alison Brown commented on topic "BLC can anyone tell me the hybrid name" by Alison Brown
  4. Julie Ellner commented on topic "Phalaenopsis Hope Star" by Karl Olsen
  5. Image Carol Holdren commented on orchid Rlc. Princess Shasta
  6. Image Carol Holdren commented on topic " "Aztec Gold"" by Susan Makar
  7. Julie Ellner commented on topic "Any idea of this Cattleya?" by Juan Martin Cabrejos
  8. Image Carol Holdren commented on member plant Blc. Petch Sayam by Terence Kew
  9. John Appelbaum commented on member plant Blc. Hausermann's Charm by John Appelbaum
  10. Dsc 0747 Kathleen Kust commented on topic "Ellison Onizuka" by Raina Steiner