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Plant bugs are so called “true bugs”. Plant bugs are sucking pests that feed on plant fluids. Damage includes a variety of symptoms, from dark leaf spots to deformed terminal growth. One of the most serious pests among the true bugs is the tarnished plant bug, Lygus lineolaris. This pest occurs throughout much of North America and has been recorded from nearly 400 host plants, including many herbaceous and woody ornamentals.

Tarnished plant bugs overwinter as adults in sheltered areas (e.g. leaf debris, under bark, in rock piles) and become active when temperatures warm in the spring. Adults fly to host plants and begin feeding. Eggs are laid into plant tissue such as leaf petioles, the base of the leaf blade or small flowers. Nymphs emerge from the eggs in 7 to 10 days and begin feeding. The nymphs pass through five stages before becoming adults. The egg to adult life cycle takes about 21 to 28 days. There are two to five generations per year, depending on geographical location.

Discus™ – Nursery Insecticide
Apply 25 – 50 fluid ounces per 100 gallons as a foliar spray; OR apply 3.4 to 5.6 fluid ounces per 1000 ft2 as a spray to the soil surface, followed by irrigation or rainfall to move the active ingredient to the root zone. Use at least 2 gallons of spray volume per 1000 ft2; OR apply .75–1.5 fluid ounces per inch of trunk diameter (at breast height) or per foot of shrub height. Use a minimum of 10 gallons of water per 1000 ft2 as a drench; OR mix 13 fluid ounces (385 ml) in the appropriate amount of water for drenching containers of different sizes (see label)

Decathlon™ 20 WP – Synthetic Pyrethroid
Apply 1.9 ounces (54 grams) per 100 gallons as a foliar spray to control plant bug nymphs and adults. Tank mix with Azatin XL insect growth regulator to improve control of nymphs. Repeat applications at 5–7 day intervals.