Hello, ( if this response is 'run together' I apologize, my computer has a problem right now)---- To use diatomaceous earth for control of squash bugs, sprinkle it around the base of the plants. It works when dry to dehydrate soft-bodied insects. Once it is wet it is not very effective. Adding it to compost and using the compost next year will not control them. ------- Squash bugs over winter in the garden debris so do not compost your debris that was from the problem areas. I am giving you some info on controlling squash bugs---- This control information is from Univ. of Illinois Extension- http://ipm.illinois.edu/vegetables/insects/squash_bug/ ----- "Early detection of the squash bug is important. Seedling plants, new transplants, and flowering plants are the most critical to monitor. It is during these growth stages when the most damage can occur and action should be taken. Early in the season, populations are generally not at high levels, however, seedlings and transplants should be watched for signs of wilting. During flowering, an average of more than 1 egg mass per plant should be used as an action threshold.------------- The key to managing this insect is early detection; timing is crucial. Adult squash bugs are difficult to kill; smaller nymphs are easier to control. Insecticides are most effective if applied when eggs are hatching. The effectiveness of insecticides is affected by the dense plant canopy under which the squash bug feeds. --------------- Cultural practices also aid in the management of the squash bug. Destruction of crop residue and the removal of fruit and vines after harvest reduces the overwintering populations. This removes necessary food sources that the insect requires to build up food reserves to see itself through the winter. Growers should also consider using resistant varieties as well as rotating crops with non-susceptible hosts. Proper fertilization allows plants to grow more vigorously and withstand more insect pressure. ---------- Tips for home gardeners include picking egg masses off plants a couple times a week as well as placing a board or shingle in the garden. During the night, both adults and nymphs will congregate underneath the board and then can be disposed of in the morning." ------------ This link has info on chemical controls and using diatomaceous earth --------- http://www.ext.colostate.edu/pubs/insect/05609.html -------------- I hope these articles are helpful. Insects do have 'good' years and 'bad' years. So perhaps next year you will have less to contend with. Thank you for using our service.