Radical changes in crop production have occurred in the southeastern USA in recent years. Peanut (Arachis hypogaea L.) and cotton (Gossypium hirsutum L.) are now planted in direct rotation, and conservation tillage is commonly used for both crops. Comprehensive data is lacking on crop and pest management recommendations in those systems, so a long‐term study was conducted in Tifton, GA on the effects of tillage systems on crop and pest management in a peanut–cotton rotation. Systems evaluated were conventional, reduced, and minimum tillage. Plots in conventional tillage systems were harrowed, deep‐turned, and planted each year. In reduced tillage systems, plots were harrowed in the fall and planted to rye (Secale cereale L.), and crops were planted into killed rye. In minimum tillage systems, plots were neither tilled nor planted to rye and remained nontilled during the winter, and crops were planted directly into the previous crop stubble. Weed control was based on species present and tillage system. Peanut was either treated with flutolanil [3′‐isopropoxy‐2‐(trifluoromethyl) benzanilide] for soil‐borne disease control or not treated (control). Yields were sustained for 5 yr with no difference in peanut or cotton yields among tillage systems. Flutolanil controlled soil‐borne diseases and increased peanut yields, working equally well in all three tillage systems. Weed densities and species composition changed, causing more intensive and costly weed control in reduced and minimum tillage systems than in conventional tillage systems. Spotted wilt (tomato spotted wilt tospovirus) incidence was 42% lower in reduced and minimum tillage systems than in conventional tillage systems and is now part of the recommended strategy to manage the disease.

SUMNER, DOUPNIK & BOOSALIS Multiple cropping: The intensification of cropping in time and space such as growing two or more crops on the same fi eld in a year. Sequential cropping: Growing two or more crops in sequence on the same field per year where the succeeding crop is planted after the preceding crop is harvested (double cropping, triple cropping, and quadruple cropping). Intercropping: Growing two or more crops simultaneously on the same field. Monocropping: Growing one crop on a fi eld each year. Monoculture: The repetitive growing of the same crop in the same land. More detailed explanations of other terms used in multiple cropping are given in other papers (5, 7, 74, 75, 85). Tillage in agriculture is the changing of soil conditions for crop produc tion (2). Definitions used for tillage practices are as follows: Conventional tillage: Traditional tillage system, which typically begins with a primary deep tillage operation followed by some secondary tillage for seedbed preparation (7). Conservation tillage: Any tillage practice that reduces loss of soil or water compared to unridged [soil is not mounded into a specifi c confi guration (2)] or clean tillage (85). Minimum tillage: That minimum amount of tillage required to create the proper soil condition for seed germination and plant establishment (85). Notill age, zero tillage: A method of planting crops that involves no seedbed preparation other than opening the soil for the purpose of placing the seed at the intended depth. This usually involves opening a small slit or punching a hole into the soil. There is usually no cultivation during crop production. Chemical weed control is normally used (85). Chiseling: A tillage operation in which a narrow tool is used to break up hard soil. It may be performed at other than the normal plowing depth (2). Plowing: A primary tillage operation which is performed to shatter soil with partial or complete soil inversions (2). Subsoiling: Tillage of sll;bsurface soil, without inversion, below 406 mm, to break up dense layers that �estrict water movement and root penetration (2,85). Reduced tillage systems have been established in many areas of the world and will become increasingly important in other areas where soil moisture

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Yellow nutsedge (Cyperus esculentus L.) is a serious weed problem in the United States and other countries. An indigenous rust fungus [Puccinia canaliculata (Schw.) Lagerh.], pathogenic on yellow nutsedge, was released in early spring as a potential biological control agent. The fungus inhibited nutsedge flowering and new tuber formation. The fungus also dehydrated and killed nutsedge plants. The successful control of yellow nutsedge by a rust epiphytotic under experimental conditions demonstrates the potential use of the rust in an integrated weed management system.