Location: Southern Ca
May 14, 2011 1:24 pm
These little bugs walk/crawl but they also jump. Naked eye they look dark and can see two little antenna at the head. Sorry the pix are not as lit up as I would have liked. I live in the high desert of San Bernardino County in Southern Ca. I planted a Marijuana plant in my back yard with Promix potting soiless mix. These little critters are swarming around the mix. I put some dish liquid soap in with my nutrient solution when watering and it seemed to knock them down a lot but not gone. I have found them inside my home as well (this morning there were approx 7 of them in my bathroom sink). Can you tell me what they are and if they are harmful to Marijuna plants? And what is the best defense if they are? Thanks Bugman!!
We believe you have Thrips. Despite your awesome photomicroscopy, we still find the anatomy of this critter a bit confusing and we do not have the necessary experience to identify this insect with certainty, however, we feel that based on the information we do have, that Thrips seems like the likeliest candidate. Perhaps someone more knowledgeable will be able to provide a definitive identification. Here is a link to the Thrips order Thysanoptera on BugGuide. BugGuide notes: “The word thrips is singular and plural; there is no such word as “thrip” (in other words, “I saw a thrips” is an example of correct usage). The word thrips itself is said to be from a Greek word, meaning “wood louse” or woodworm, referring to their abundance in dead branches, where they feed on fungus.” BugGuide offers this assistance with identification: “Thrips are tiny insects, only a few mm in length at most. Thrips may or may not have wings. When wings are present, they are narrow with few or no veins and fringed with long hairs. Thrips have asymmetrical mouthparts (no right mandible) suitable for piercing and sucking. Antennae of thrips have four to nine segments and are relatively short. Tarsi of thrips have one or two segments with one or two claws and are bladder-like at the end.”