I realize this is a late post to this thread, but the most effective organic control against psyllids is Azadarachtin. It does not harm beneficials and has 3 modes of action. It does not kill them on contact, but rather by upsetting the molting to the next stage in nymphs and eggs, and acting as an anti-feedant in adults. It is available in several trade names, Azatin XL is one, Azatrol is another. If you are organic gardening you really do not want to use Spinosad or some of the other chemicals mentioned here because you will upset the beneficial insect population and cause more problems. I first got psyllids a few years ago here in northern california and with our mild winters they are overwintering. Check the undersides of your leaves early and often. Spraying the undersides of the leaves with azadarachtin a few times if you have them will keep it in check by upsetting the 3 life stages of the psyllids. The UC IPM web site really needs to update their information to include more effective controls such as this. It took me awhile to read some commercial grower studies that noted Aza as quite effective. I use it exclusively in my garden for any pests when I can't completely rely on my beneficials for control.

Hi Don--I'm no expert but I have had Masons for a few years. I tried holding back half of my bees this year because the fruit tree bloom is a bit late. I kept that half in the frig for a few weeks. The day before I planned on putting them out I put them back in my outside shed. When I went to get them the next day (March 30) there was a bee crawling around under the lid. I wonder if it has something to do with "time" not just "temps". I do think you have some live bees still as long as the one at the head of the tube is alive. If it's dead then the rest can't get out. Give them a few more days and make sure they are on the south side of the house where they get plenty of sun. Happy gardening......................Tom

Tim, sounds like my house. I have 3 boxes. I put fishing line on a box that some HOSP had started building a nest in. I took the nesting material out and opened the box for awhile. This happened about a month ago. I closed the box and put fishing wire near the entrance hole. HOSP didn't like that and they seemed to have gone away. Today they are back building a nest, fishing wire and all. I opened the box, took out the nesting material to deter them. My blues have already started laying eggs in another box. There are 3 eggs now. . One HOSP landed on that box. The blues chased them away. Then One HOSP landed on the other box (empty box) blues chased them away from that box. I will have to keep an eye on everything. I live on a golf course. My yard is fairly large, but not too large that I can't see comings and goings. I don't have fish wire on the other two boxes. May have to put some on the box the eggs are in and see if that will work. Hope it won't disturb the blues too much.

Hi Kathleen- I'll address you since the other posts are old. I am so very sorry that you have experienced this. Did you read what the responses were to the older post of one that lost a bluebird on the nest? I would just repeat everything that they said. If absolutely no sign of injury, I would suspect lawn pesticides, but considering what happened to the 1st person that posted & didn't see signs of injury on her bluebird, it did turn out to be house sparrows. I would highly suspect this. Do you think the female is dead too? If so, again I would be suspicious of HOSP. Answering your question, the male would not starve himself, nor is he able to brood eggs. If the female died too, the eggs wouldn't have hatched because the female is the one to incubate the eggs. She has a brooding patch on her lower abdomen that the male doesn't have. If she is alive, she may not be returning to nest because of the failed nest situation, especially if there was foul play. Make sure you know that she is not returning before removing the nest & eggs. If she is alive, she will probably try to find a new mate. Without repeating too much, make sure your birdhouse is on a pole with a baffle & put a sparrow spooker up after the 1st egg. If you know for sure that the nest has been abandoned & you don't get any activity, you may want to change the location of the box (birdhouse). If you immediately get a house sparrow setting up shop, then you'll know that was most likely the culprit. Again, if female is not returning, now would be the time to get a Van Ert trap for your house to trap the male & female HOSP. If you do, make sure you are monitoring every hour if possible so you don't trap a native bird. They can die in there if without food for too long. One of the previous posts left a website for the Van Ert trap. Again, the previous posts left great advice for your situation. This site is not as active as it used to be for bluebirders, so you may want to post to bluebirdnut.com. Lots of bluebird experts are on that site like this one used to have. That's where I go whenever I need advice. BTW, I lived in Atlanta for ten years (live in AL now). Very sorry to hear about your bluebird tragedy. Hope you'll have another pair come for a future nesting, but definitely get that sparrow spooker!