Sevin Concentrate should be fine to spray on dichondra, just be sure not to apply during high temperatures.
Sevin Concentrate is not labeled to control aphids on cucumbers. Instead we would recommend using a systemic product like the Monterey Fruit Tree and Vegetable Systemic Soil Drench for future protection and the Fertilome Triple Action for active aphids.
Sevin Concentrate is not a systemic product and will not get up through the whole tree, which is likely why they do not suggest using it in the larger trees.
According to the Sevin Concentrate product label "This product is highly toxic to honeybees and other bees. Do not apply to plants in bloom." Almost all insecticides are toxic to bees as they are not really selective. You can help limit any effect to bees by being careful not to apply the insecticides when bees are actively foraging in the area.
Yes, Sevin Concentrate is labeled for springtails.
Sevin Concentrate is not listed to be used on pets. Please visit our Pet Flea Control page for products safe to use on pets.
Sevin Concentrate is only labeled for outdoor use.
Sevin Concentrate does not require the use of a surfactant.
It is recommended to apply Sevin Concentrate when you are not expecting any rain for 24 hours.
Pets should be kept out of the area while Sevin Concentrate is being applied. They can return as soon as the area has thoroughly dried, which normally takes a couple of hours.
For best results, you should apply Sevin Concentrate at least 24 hours before you are expecting any rain. After that point, it will be rainfast and you will not need to reapply.
Sevin Concentrate does state it should not be applied to trees larger than 10 feet tall; this is possibly because doing so would not apply an adequent amount of product to the trunk to be effective in killing insects that contact it. When treating for bark beetles, it is recommended to spray up to 15 feet high since generally they do not go much higher than that. You can use a product like Permethrin SFR to do so. Unfortunately, once the borers have already infested the tree there are not any viable treatment options as they would be protected from sprays. In cases of infestation the general recommendation is simply to protect the surrounding trees with preventative sprays with a product labeled for such a use. Infested trees will need to be trimmed and/or completely removed.