You bought a pesticide product that needs to be mixed with water before applying. Did you accidentally mix up too much and now have leftover pesticide? What should you do with it?

Before mixing or applying a pesticide, always read the pesticide label to see where the product can be used (i.e., what plants it can be applied to) and apply any excess mixed pesticide in these sites. For example, if you applied an insecticide to control aphids on your roses and you have leftover product, check the label to see if you can apply the remaining product to your tomato plants that also have aphids.

Leftover pesticides should never be poured down the drain, including indoor drains, outdoor drains, or gutters/storm drains....

If you've noticed tiny, dark insects flying around your houseplants, you likely have fungus gnats. These tiny flies can be a nuisance indoors and may also damage your plants.

Fungus gnats lay their eggs in moist soil and their larvae feed on plant roots and decaying organic matter. Because of this, the key to managing fungus gnats is to let the soil dry out in between watering and don't overwater plants. Water plants from the bottom using saucers under pots. This keeps the top of the soil dry, discouraging fungus gnats.

Sticky traps can be placed in pots or near plants to catch fungus gnat adults. This is also a great way to monitor for fungus gnats. Pesticides, including several biological pesticides like...

Just a few more weeks of summer remain! As the weather begins to shift, you may need to adjust your landscaping practices to prevent and monitor for fall pests. The UC IPM Seasonal Landscape IPM Checklist is a monthly guide to help you avoid common pests of landscape plants.

Here are some general tips for the month of September to prevent pests and their damage in the garden and landscape. Visit the checklist online to see more pest management to-dos for your region.

• Monitor citrus plants for signs of pests such as

Nobody wants cockroaches in their home, especially since these pests can cause and worsen allergies in children, transmit diseases and bacteria, and contaminate foods.

If you find cockroaches in or around your home, do you reach for a do-it-yourself spray product? Well, you might not want to waste your money!

New research shows that some common consumer-grade insecticide sprays don't work to get rid of cockroach infestations. The study focused on products containing pyrethroids, which is a group of pesticides commonly found in many household insecticide products. Examples of...