Yes, Bifen IT can be used in a hose end sprayer. You will use 1 fl. oz. of solution and 5.5 ml of Nyguard IGR per gallon of water. You will put the concentrate directly into the cannister, and the tube will automatically use how much you have on the dial. It will disperse with each gallon that comes through the hose. You will need to be as accurate as possible when using this method. Please let us know if you have any additional questions.
Per the product label, the soil around a well can be treated with Bifen IT. You can treat up to three feet away from the well.
With Bifen IT, the label states that when you are treating for yellow jackets, spray the nest opening in the ground, bushes, and in cracks and crevices where the insects may nest. Saturate the openings and contact as many insects as possible. Please let us know if you have any additional questions.
Indoors, Bifen IT is only labeled to be used as a crack and crevice to baseboards, corners, storage areas, closets, around water pipes, doors and windows, behind and under refrigerators, cabinets, sinks, furnaces, stoves, the underside of shelves, drawers and similar areas. Bifen IT is great for outdoor control of Noseeums.
Along with vacuuming the carpeted areas daily, using a product called Microcare will provide you with a fast knockdown and kill flying insects which will give you immediate relief.
You can read our article on how to treat Noseeums here.
We are not sure what type of worm would be considered a "red worm" as you have described.  If you are referring to earthworms, Bifen IT is not labeled for earthworms, because they are a beneficial but it may cause harm to them if they contact a treated area.  Though they are pretty protected by the mucus on their bodies. This small amount of product needed to kill tiny insects would not be enough to harm a bird if they were to ingest a worm that would have contacted the product.
Bifen IT is not designed to kill on contact and even when you spray an insect directly it can take several minutes or longer to kill it. It will help to kill the ones that contact a treated surface as well as their food source, but how long it takes to kill after application depends on age and health of the insect, how long after application they contact the treated surface and how long they spend on the treated surface. Spiders themselves are harder to kill as they do not groom themselves and have the long legs to keep themselves off the ground and in more contact with a treated surface. We have a great guide here for treating spiders that might also help. If you are going to be spraying spiders directly each time, you could add a product like ExciteR to Bifen to give it a faster initial knockdown only.
Bifen IT is for insects only and will not treat fungus or other causes of spots on plants. It is important to identify the disease on your plants so that you can select a product that will work for your needs. You can contact your local cooperative extension office and speak to the master gardener on staff for help identifying the type of disease on your plants
Bifen I/T is a great product for earwigs and a large variety of other insects as well. You will spray Bifen indoors around baseboards and cracks and crevices, and outdoors around window and door frames, and around the foundation of the home 2-3 feet up on the side and 2-3 feet out on the ground. Earwigs like moisture and dark areas so if you have any mulch or pinestraw against the home or close by in the yard, turn those areas to help dry them out and soak them down with the Bifen to help kill anything living there. Children as well as anyone other than the person applying the product need to be out of the area being treated while the product is being applied and until everything is fully dry. Once all surfaces are dry it is completely safe for everyone to return.