scholarly journals Economic Injury Level of the Neotropical Brown Stink Bug Euschistus heros (F.) on Cotton Plants

2016 ◽  
Vol 46 (3) ◽  
pp. 324-335 ◽  
Author(s):  
M F Soria ◽  
P E Degrande ◽  
A R Panizzi ◽  
M D Toews
Keyword(s):  
Stink Bug ◽  
Economic Injury Level ◽  
Euschistus Heros ◽  
Cotton Plants ◽  
Economic Injury

Trap-Based Economic Injury Levels and Thresholds for Euschistus servus (Hemiptera: Pentatomidae) in Florida Peach Orchards

2020 ◽  
Vol 113 (3) ◽  
pp. 1347-1355 ◽  
Author(s):  
Cory Penca ◽  
Amanda C Hodges ◽  
Norman C Leppla ◽  
Ted E Cottrell
Keyword(s):  
Stink Bug ◽  
Economic Injury Level ◽  
Late Season ◽  
Growing Seasons ◽  
Management Actions ◽  
Economic Thresholds ◽  
Euschistus Servus ◽  
Economic Injury ◽  
And Control ◽  
Time Of Harvest

Abstract Populations of the brown stink bug, Euschistus servus (Say), in Florida peach orchards were monitored during the 2017 and 2018 growing seasons using yellow pheromone-baited pyramid traps. Peaches were evaluated at harvest for the presence of stink bug injury. A relationship between E. servus trap capture and fruit injury was used to estimate the economic injury level (EIL) for varying scenarios of crop price, per-hectare yield, and control costs. Economic thresholds were then set based on observed E. servus population trends and expected rates of increase. Thresholds were lowest in the period immediately following shuck split due to the rapid increase in E. servus populations during this period. Euschistus servus trap capture trended downward at the time of harvest. Therefore, increased E. servus management early in the Florida peach season provides the greatest overall benefit, whereas late season populations decline independent of management actions. The proposed EIL for Florida peaches determined by this study is 5.53 E. servus per trap over a 14-d trapping period, which was surpassed in only 16 of the 60 recorded trapping periods. This suggests that the current recommended spray frequency may not be economically justified.

Reevaluating the Economic Injury Level for Brown Stink Bug (Hemiptera: Pentatomidae) at Various Growth Stages of Maize

2020 ◽  
Vol 113 (5) ◽  
pp. 2250-2258
Author(s):  
Tim B Bryant ◽  
Seth J Dorman ◽  
Dominic D Reisig ◽  
DeShae Dillard ◽  
Roger Schürch ◽  
...  
Keyword(s):  
Grain Yield ◽  
Growth Stage ◽  
Early Stage ◽  
Growth Stages ◽  
Stink Bug ◽  
Infestation Level ◽  
Economic Injury Level ◽  
Euschistus Servus ◽  
Economic Injury ◽  
Late Stages

Abstract Economic yield loss and reduction in grain quality from brown stink bug, Euschistus servus (Say), feeding injury in early and late stages of maize, Zea mays (Poales: Poaceae, Linnaeus), development was assessed in Virginia and North Carolina in 2018 and 2019. Varying levels of stink bug infestations were introduced to seedling maize (V2—early stage), and a range of late-stages of maize, including 1) the last stage of vegetative development (V12/V14), 2) prior to tasseling, 3) at tasseling (VT), and 4) across all tested late growth stages. Euschistus servus infestation levels included 33, 67, and 100% of maize seedlings, and 25, 50, 100, and 200% of plants during later stages. Infestations were maintained on seedling maize for 7 d, and 8 or 16 d in reproductive stages. Infestation level in seedling maize had an impact on grain yield. Infestation level and growth stage both had an impact on grain yield in reproductive maize. The percentage of discolored kernels was also affected by infestation level, but not growth stage. Regression analysis between grain yield and infestation level indicated that the average economic injury level is 7% in seedling maize (7 bugs/100 plants) and 12% (12 bugs/100 plants) from the last vegetative stages (V12/V14) through pollination (VT). The economic injury level in the late vegetative stages is only applicable when infestations are present for an extended period of time (16 d), emphasizing the need for continued scouting of maize throughout the season to make informed management decisions.

Economic Injury Level for Heliothis spp. Larvae on Cotton Plants in the Four-True-Leaf to Pinhead-Square Stage12

1982 ◽  
Vol 75 (2) ◽  
pp. 328-332 ◽  
Author(s):  
Alfred R. Hopkins ◽  
Raymond F. Moore ◽  
William James
Keyword(s):  
Economic Injury Level ◽  
True Leaf ◽  
Cotton Plants ◽  
Economic Injury ◽  
Heliothis Spp

scholarly journals Perception and Use of Economic Thresholds Among Farmers and Agricultural Professionals: A Case Study on Soybean Aphid in Minnesota

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Natalie Hoidal ◽  
Robert L Koch
Keyword(s):  
Soybean Aphid ◽  
Educational Outreach ◽  
Economic Injury Level ◽  
Economic Thresholds ◽  
Foundational Principle ◽  
Economic Injury ◽  
Fundamental Misunderstanding ◽  
The Difference ◽  
Commercial Pesticide ◽  
Agricultural Professionals

Abstract Economic thresholds (ETs) are a foundational principle of integrated pest management but are not always widely accepted by farmers and agricultural professionals. This article reports on a survey of Minnesota farmer and agricultural professional perceptions of the ET for soybean aphid, Aphis glycines Matsumura (Hempitera: Aphididae). We discuss insights for Extension programs on how to frame the importance of thresholds and teach stakeholders to use them effectively. Key takeaways include farmers and agricultural professionals often worry about combined effects of insect, disease, and physiological pressures, whereas effects of interactions with these other stressors are seldom discussed in educational outreach. Across groups, there is a fundamental misunderstanding about the difference between ETs and economic injury level. Many survey participants reported believing in the ET but lacked the time and capacity to fully implement it. Sales agronomists and farmers were the least likely groups to trust the university-determined soybean aphid ET, whereas commercial pesticide applicators and independent consultants were the most likely groups to trust it. Based on these results, we recommend adapting communication about ETs based on the target audience to address common misconceptions and barriers to ET use that are unique to each group.

Model for Simulating Consumption and Economic Injury Level for the Range Caterpillar (Lepidoptera: Saturniidae)1

1983 ◽  
Vol 76 (6) ◽  
pp. 1231-1238 ◽  
Author(s):  
Tom S. Bellows ◽  
John C. Owens ◽  
Ellis W. Huddleston
Keyword(s):  
Economic Injury Level ◽  
Economic Injury ◽  
Range Caterpillar

scholarly journals Diapause and different seasonal morphs of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) in Northern Paraná State

2000 ◽  
Vol 29 (2) ◽  
pp. 205-218 ◽  
Author(s):  
Ana P. M. Mourão ◽  
Antônio R. Panizzi
Keyword(s):  
Mangifera Indica ◽  
Reproductive Organs ◽  
Stink Bug ◽  
Ligustrum Lucidum ◽  
Mango Tree ◽  
Euschistus Heros ◽  
Males And Females ◽  
Fallen Leaves ◽  
Diapause Incidence ◽  
In The Beginning

The Neotropical brown stink bug, Euschistus heros (Fabr.), was collected on sunflower [Helianthus annuus (L.)], soybean [Glycine max (L.) Merrill], star bristle [Acanthospermum hispidum (DC.)], and under fallen leaves of mango tree [Mangifera indica (L.)] and privet (Ligustrum lucidum Ait.), during one year, to evaluate the diapause incidence and the occurrence of different seasonal morphs. The majority of the insects (ca. 90%) with mature reproductive organs was observed during the summer (December-March), when E. heros was found on soybean or on sunflower; in the beginning of autumn, most insects (87%) showed immature reproductive organs, and they were found on star bristle and under fallen leaves. Bugs with mature reproductive organs had more developed shoulders (3.23 and 3.27 mm, for males and females, respectively) than bugs with immature organs (2.91 and 2.89 mm, for males and females, respectively). Two distinct body colors, dark brown and reddish brown, were observed. Nevertheless, the reddish brown was the predominant color of both mature and immature adults during all year. Adults were parasitized by Hexacladia smithii (Ashmead) (Hymenoptera: Encyrtidae) and Tachinidae mainly Trichopoda giacomellii (Blanchard) (Diptera: Tachinidae) (80% and 40% of parasitism in male and female, respectively) during summer (December), when the bugs colonized sunflower. In soybean, 12% of males and 10% of females were parasitized, whereas in fallen leaves, the parasitism rate was 5% in both sexes.These results showed that in autumn/winter (shorter photoperiod) the majority of the insects were inactive under fallen leaves, showing immature reproductive organs and less developed shoulders, indicating that, at this time, these bugs were in diapause.

scholarly journals Sublethal Concentration of Pyriproxyfen Reduces Testicular Connective Tissue Thickness in Euschistus heros Fabr. (Hemiptera: Pentatomidae)

2021 ◽  
Vol 13 (9) ◽  
pp. 27
Author(s):  
Janaina F. Matsumoto ◽  
Paulo S. G. Cremonez ◽  
Samuel Roggia ◽  
Angela M. F. Falleiros ◽  
Sheila M. Levy ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Sublethal Concentration ◽  
Experimental Unit ◽  
Stink Bug ◽  
Hormone Analogue ◽  
Working Pressure ◽  
Morphometric Analyses ◽  
Euschistus Heros ◽  
Different Types ◽  
Randomized Experimental Design

The aim of this study was to determine the effect of the insecticide pyriproxyfen (Tiger™ 100 CE), juvenile hormone analogue, when applied in a sublethal LC30 concentration (0.668 mL a. i. L-1), on the morphological and morphometric parameters of external and internal connective tissue (CT) of the Neotropical-brown stink bug Euschistus heros testicles. The insecticide was applied on nymphs from the 4th instar using a Potter tower with a working pressure of 82.73 kPa (12 lb pol-²) and 1 mL of the emulsion per replicate. A completely randomized experimental design was used, consisting of two treatments (control and pyriproxyfen-treated), five repetitions, and 10 adults of E. heros per experimental unit. The insects were maintained under controlled conditions until the emergence of adults. After 48 h of emergence of adults, the testicles were collected, fixed, and processed for morphological and morphometric analyses. A change was observed in the collagen fibers of the CT of treated insects when compared with those of controls. It was also observed that both types of CT (dense irregular and loose) over the internal tunic of the treated insect were thinner than those in control insects. The analysis showed that pyriproxyfen significantly reduced the external and internal CT width and the conformation of its fibers in all the observed regions when compared with the controls; this may affect the production of the three different types of sperm present in this species.

scholarly journals Parâmetros biológicos de Euschistus heros (Fabricius, 1794) alimentado com diferentes dietas

2021 ◽  
Vol 4 (1) ◽  
pp. 152-159
Author(s):  
Yves Pierre Harry Dalleinne ◽  
◽  
Aline Giothi ◽  
Rosane Betina Wandscheer ◽  
Ivonete Hoss ◽  
...  
Keyword(s):  
Food Preference ◽  
Eating Habits ◽  
Feeding Preference ◽  
Stink Bug ◽  
Euschistus Heros ◽  
Males And Females ◽  
Seeds And Fruits

During their development, insects can suck plant structures like seeds and fruits being the preferred structures. The study aims to monitor the eating habits of these insects are relevant mainly in terms of food preference and development. The objective of this work was to analyze the feeding preference of Euschistus heros (brown stink bug) fed with 5 diets. The different diets studied resulted in insects in adult, with significant differences in the length of the nymph period, differences in the weights of males and females and variation in survival during the experiment.

Sign in / Sign up

Export Citation Format

Share Document