Common Problems

Creeping buttercup is a stoloniferous plant that spreads through thin turf, forming patches in lawns and parks.

Annual fleabane, also called daisy fleabane, is a common and fast-growing broadleaf weed found in Pennsylvania lawns and other low maintenance turf areas. Its common name comes from folklore claiming dried plant material will repel fleas.

Extension professionals and pesticide industry representatives consistently reminded growers to read the pesticide label thoroughly and observe all precautions listed on the label.

Common field speedwell is a common weed of home lawns, parks, institutional grounds, and golf courses in Pennsylvania.

Hairy bittercress (Cardamine hirsuta L.) is one of the first broadleaf weeds to appear in home lawns, parks, and other turf areas during early spring.

The return of metarhizium brunneum strain F52 to the market gives growers another tool for combatting pest problems in the greenhouse.

Selecting plants for placement in the interiorscape can be simplified if the key plants used are known and if the key pathogens on those plants can be identified.

Of the two major types of diseases of woody ornamentals—biotic and abiotic—abiotic diseases are by far the most important ones on landscape and nursery plants.

Western flower thrips are one insect pest that can wreak havoc on even the best-managed garden mum crop.

Tobacco Mosaic Virus (TMV) can infect up to 350 species of plants, including common crops like bacopa, calibrachoa, petunia, nicotiana, scaveola, verbena, eggplant, tomato, pepper, tobacco, etc.

Pansies are very susceptible to several root diseases like Pythium, Rhizoctonia, Fusarium, and Thielaviopsis (Black root rot).

The pH of the greenhouse media substrate can significantly influence nutrient uptake and availability in plants.

Disinfectants are chemicals that kill or inactivate pathogens before plant infection occurs. This article addresses the disinfection of equipment.

Botrytis or gray mold (Botrytis cinerea) is commonly observed in greenhouse environments on a wide range of ornamental and vegetable crops.