How to Manage Pests
UC Pest Management Guidelines
False Chinch Bug
Scientific Name: Nysius raphanus
(Reviewed 5/13, updated 5/13, corrected 9/15)
In this Guideline:
Description of the Pest
False chinch bugs are about 0.12 inch (3 mm) long, narrow bodied, and gray-brown. Immature bugs have inconspicuous red markings on the body. False chinch bugs often hide under plants or clods during the heat of the day. Do not confuse them with bigeyed bugs, which are wider with flatter heads. False chinch bugs migrate to cotton when cruciferous weed hosts dry up or are destroyed by cultivation; migration can be a concern for cotton fields near pastures or rangelands that are drying down for the summer.
These bugs feed on seedlings. Individual bugs do little damage, but large migrations can severely injure or kill young plants in a few hours. Damage is usually confined to border rows.
In cotton fields isolated from pastures, rangelands, or weedy fallow fields, early season control of cruciferous weed hosts within the field well before planting will eliminate the probability of this pest occurring in cotton. For fields adjacent to weedy areas, pastures, or rangelands, monitor for this pest during crop emergence and seedling growth. Monitoring nearby crops, fences, and weedy areas surrounding the field can serve as an early detection method for migrating bugs.
If damage from false chinch bugs reaches unacceptable levels, treatments to field edges are usually sufficient to control this pest.
UC IPM Pest Management Guidelines:
Insects and Mites
Acknowledgment for contributions to Insects and Mites: