| Various forms of repellents also can be sprayed on trees to keep wildlife away. |
| To be useful, pesticides and repellents must work against not only mosquitoes but also other disease-transmitting arthropods. |
| Farmers also only use synthetic pesticides as a last resort to save the crop, relying instead on natural repellents and controls such as neem. |
| Insect repellents are available in a variety of forms including, sprays, roll-ons, sticks, plug-in devices and creams. |
| Preliminary studies have shown that granular materials containing castor oil have been less effective than liquid repellents. |
| Insect repellents for humans and shampoos or collars containing insecticide for pets can help control or reduce tick infestations. |
