Best Management Practices for Irrigating Lawns and Urban Green Spaces with Reclaimed Water

The purpose of this article is to present some sound recommendations, known as best management practices (BMPs), for irrigating lawns and other green spaces with reclaimed water (RW). These BMPs are for homeowners and landscaping professionals who use RW to irrigate home lawns or other irrigated green spaces in urban landscapes. Written by Mary G. Lusk and Don Rainey and published by the UF/IFAS Department of Soil and Water Sciences; 4 pages.

Orthopteran Pests: Family Gryllotalpidae

This chapter focuses on Orthopteran pests. The southern mole cricket and the tawny mole cricket are members of the order Orthoptera, family Gryllotalpidae, subfamily Gryllotalpinae. Two genera are listed in this subfamily. The genus Neoscapteriscus can be distinguished by the front tibia with two dactyls; the genus Gryllotalpa has front tibia with four dactyls. The southern mole cricket and the tawny mole cricket are the most destructive insect pests of bahiagrass and bermudagrass turfgrass and pastures in the southeastern United States, and they attack and damage most other warm-season grasses as well. Golf courses are among the areas most heavily affected, but home lawns, athletic fields, and other areas also sustain serious damage.

Factors Influencing Home Lawn Fertilizer Choice in the United States

Home lawn fertilizer use throughout the United States is coming under increased scrutiny due to potential negative environmental impacts. A better understanding of how consumer perceptions and socio-demographics impact their choices of types of lawn fertilizers can aid industry stakeholders when marketing products. This research uses a nationwide survey to evaluate factors that impact respondents’ choice of lawn fertilizer brands. Respondents with home lawns selected the lawn fertilizer brands they purchased the most frequently and rated the importance of various fertilizer attributes (e.g., nitrogen–phosphorus–potassium ratio, brand, price, etc.) when selecting lawn fertilizers. Given many lawn fertilizer brands share commonalities, respondents’ answers were grouped into five categories: most popular brand, primarily turf brands, sustainable/organic brands, other brands, and “I don’t remember the brand.” The most popular brand of fertilizer was chosen by 69% of respondents, with the primarily turf brands and other fertilizers being chosen by 25% and 23% of respondents, respectively. This study finds that brand selection is impacted by important fertilizer features, frequented retail outlets, geographical region of residence, and demographic variables. For example, brand importance and purchasing from mass merchandisers or wholesale clubs increased respondents’ selection likelihood of the most popular brand by 6.9% and 20.5% points, respectively. Marketing implications are discussed.

Growth Responses of Zoysia spp. under Tree Shade in the Midwestern United States

‘Meyer’ zoysiagrass (Zoysia japonica Steudel) is commonly planted on home lawns and golf courses in the transition zone; however, poor shade tolerance limits its widespread use. This study was conducted to determine changes and differences in growth among selected Zoysia cultivars and progeny under a natural shade environment over a 3-year period in the transition zone. The study was initiated in June 2010 at the Rocky Ford Turfgrass Research Center in Manhattan, KS. Soil type was a Chase silt loam (fine, montmorillonitic, mesic, Aquic, Argiudoll). Zoysia genotypes were sodded in 0.37-m2 plots and arranged in a randomized complete block with five replications under silver maple (Acer saccharinum L.) shade that resulted in a 91% reduction in photosynthetically active radiation (PAR). Genotypes included ‘Zorro’ [Z. matrella (L.) Merrill], ‘Emerald’ [Z. japonica × Z. pacifica (Goudswaard) Hotta & Kuroki], ‘Meyer’, Chinese Common (Z. japonica), and experimental progeny Exp1 (Z. matrella × Z. japonica), and Exp2 and Exp3 [(Z. japonica × Z. pacifica) × Z. japonica]. ‘Zorro’ and ‘Emerald’ experienced winter injury, which negatively affected their performance. Tiller numbers decreased 47% in ‘Meyer’ from June 2010 to June 2012, but declines in [(Z. japonica × Z. pacifica) × Z. japonica] progeny were only 1% for Exp2 and 27% for Exp3, and both Exp2 and Exp3 maintained high percent green cover throughout the study. In general, by the third year of evaluation, progeny of [(Z. japonica × Z. pacifica) × Z. japonica] had higher quality ratings and higher tiller numbers than ‘Meyer’ and may provide more shade-tolerant cultivar choices for transition zone turf managers.

Khakiweed (Alternanthera pungens Kunth) Growth Response to Mowing Height and Frequency

The effect of mowing regimens on lateral spread of khakiweed (Alternanthera pungens Kunth) was determined through field studies conducted over a 3-month period in Texas during 2009 and 2010. Treatments were selected to simulate mowing regimens common to intensively managed common bermudagrass [Cynodon dactylon (L.) Pers.] turf and included heights of 1.3 cm (three times/wk), 2.5 cm (two times/week), and 5.1 cm (two times/week). A non-mowed control was included for comparison. Differences in lateral spread of khakiweed among mowing regimens were apparent 4 weeks after initial treatment (WAIT). However, plant diameter increased for all mowing regimens over the course of the trial. Khakiweed plants subjected to the 1.3-cm mowing regimen did not increase in diameter from Week 2 through Week 12, whereas the other two mowing regimens exhibited steady increases in plant diameter over the same time period. By 12 WAIT, non-mowed control plots measured 80.8 cm in diameter, whereas those maintained at 1.3 cm measured 55.3 cm. Comparatively, plants subjected to the 2.5- and 5.1-cm mowing regimens measured 64.7 and 68.8 cm, respectively. Therefore, khakiweed infestations may be more prevalent in bermudagrass mowing heights commonly used for golf course roughs, athletic fields, and home lawns (2.5 cm or greater). However, the production of a thick taproot high in carbohydrate content may enable khakiweed to regenerate from frequent defoliation common to fairway mowing regimes (2.5 cm or less). Adjustments in mowing height may not be enough to effectively reduce khakiweed populations in bermudagrass turf.

Stolon Growth and Tillering of Experimental Zoysiagrasses in Shade

Zoysiagrass (Zoysia spp.) grown under shade on golf courses and in home lawns is slow to recover from damage and declines in quality over time. We evaluated stolon growth and tillering of ‘Meyer’ and Chinese Common (both Z. japonica Steud.); ‘Zorro’, ‘Diamond’, and ‘Cavalier’ [all Z. matrella L. (Merr.)]; ‘Emerald’ (Z. matrella × Z. pacifica Goudsw.); and six experimental progeny from ‘Emerald’ × Z. japonica and reciprocal crosses of Z. japonica × Z. matrella under silver maple (Acer saccharinum L.) shade and in full sun in 2008 and 2009 in Manhattan, KS. A single 6-cm diameter plug was planted in the center of 1.2 m × 1.2-m plots, and data were collected weekly on the number of stolons, stolon elongation, and number of stolon branches. Tiller number was collected at the start and end of each study period, and biomass (excluding roots) was determined at the end of each season. Zoysiagrasses under an average of 76% tree shade exhibited reductions of 38% to 95% in stolon number; 9% to 70% in stolon length; 10% to 93% in stolon branching; and 56% to 98% in biomass. Seven of the 10 grasses exhibited a decline in tiller number in each experiment; none of the grasses differed from ‘Meyer’ in percentage change in tiller number under shade. ‘Emerald’, ‘Cavalier’, ‘Zorro’, and several progeny from crosses between ‘Emerald’ × Z. japonica or reciprocal crosses of Z. matrella × Z. japonica produced more, longer, or more highly branched stolons than ‘Meyer’, suggesting they may have improved recovery potential in shade.