The Orchid Doctor Articles under the Heading Thrips

Thrips Comments
THRIPS: A Common Pest on Vandas Inside the bud, thrips are protected from insecticides, so it is a good idea to spray early; if late use a fine spray or a misting to avoid injury; use Sevin SOW; if flowers are open use Black Leaf 40 which does not damage the flowers. A85-817 0
THRIPS: Characteristics and Controls There are both winged and wingless phases; they scrape the surface tissue of plant parts especially flowers, causing shallow, silvery scars; they are fast moving and hard to see; spray with Malathion. A73-715; N328They are a problem only occasionally; sometimes a problem with cymbidiums in bud stage; they can enter the bud sheath and become protected from insecticides; can cause ovipositor punctures of flowers; control with Diazinon, dimethoate, Malathion and Zectran sprays, or Dithio smokes or Temik granules. AH4They are sometimes airborne on strong air currents; are abundant on weeds and vegetation outdoors; control with frequent applications of weak solutions of insecticides, especially on vandaceous plants. F76-33 0
THRIPS: Control If Malathion Has Not Been Effective The Malathion used must have been old; use fresh Malathion, spray at 1.5 tpg. every five to seven days, with three applications; or spray with Zectran at 3 tpg. A72-1100 0
THRIPS: Controls Spray the young spikes preventively with Sevin 50W (Carbaryl Insecticide) in its wettable powder form; when the flowers open spray with Black Leaf 40 (nicotine sulfate); some growers use Orthene 75 (Soluble powder) at i tpg. F87-87They require persistent effort; control with Malathion, Cygon 2E, Diazinon or a Dithio smoke. A78-909; A64-692; S193; in Florida four types named and five controls given; refer to DK9+ 0
THRIPS: Controls, in Increasing Degrees of Toxicity to the User Malathion (LD50=2oz.), lindane (1/2 oz.) and dimethoate (1/2 oz.) A68-582 0
THRIPS: Distinct From Springtails Thrips also can be found in compost, they damage the roots at the conjunction of the new growing tip and the developing velamen, an area rich in sugars; control them with Malathion. OR82-256 0
THRIPS: Insecticide Control for Indoors For a basement collection under lights, use Malathion but if it is not effective, use Diazinon at the rate of 1 tpg.; it may be repeated in 14 days. A81-150 0
THRIPS: On Cymbidiums They are among the worst pests, causing spotting on flowers; the damage occurs in the form of halo dots on sepals or petals and appear very similar to Botrytis spotting; use Cygon every six weeks as a pot only drench. A67-499 0
THRIPS: On Vandas and Ascocendas Flowers show scarred, burned, or misshapened from the feeding, especially in South Florida; control them by applying wettable powders such as Sevin, or Orthene. F81-153 0

New Topics

  1. Nancy Shapiro asked question Where did you find this type of orchid pot? in category General Discussion
  2. Charles H Wood asked question Orchids wanted St.Croix usvi in category General Discussion
  3. William Gorski asked question Is this a species or Primary Hybrid? in category General Discussion
  4. Therese Stecher asked question Banrot 40WP in category General Discussion
  5. Chen Jimmy asked question How to determine the species composition? in category General Discussion

New Comments

  1. Carol Holdren commented on topic "What is the culture for Cattliante Chongkolnee" by Mike Minney
  2. Dianne Mayne commented on topic "Banrot 40WP" by Therese Stecher
  3. Linda Thorne commented on member plant Paphiopedilum Munchkin Mopsi Aru by Linda Thorne
  4. Carol Holdren commented on topic "Orchids wanted St.Croix usvi" by Charles H Wood
  5. William Gorski commented on topic "Is this a species or Primary Hybrid?" by William Gorski
  6. Henry Shaw commented on member plant Coel. Jannine Banks 'Snow White' by Henry Shaw
  7. Carol Holdren commented on topic "Trichocentrum luridum" by Danny Lyon
  8. Carol Holdren commented on topic "How to determine the species composition?" by Chen Jimmy
  9. Lois Lane commented on member plant Ctna. Why Not by Alex Maximiano
  10. Carol Holdren commented on topic "SSPECIES OF ORCHID" by JENNIFER CHARMAN