Seasonal Abundance and Degree-day Prediction of Sod Webworm (Lepidoptera: Pyralidae) Adult Emergence in Virginia

1986 ◽  
Vol 79 (2) ◽  
pp. 400-404 ◽  
Author(s):  
Mike P. Tolleyi ◽  
William H. Robinson
Keyword(s):  
Adult Emergence ◽  
Seasonal Abundance ◽  
Degree Day ◽  
Lepidoptera Pyralidae

Verification and Generalization of a Degree-Day Model Predicting Pecan Nut Casebearer (Lepidoptera: Pyralidae) Activity1

1983 ◽  
Vol 12 (2) ◽  
pp. 487-489 ◽  
Author(s):  
Dennis R. Ring ◽  
Vernon R. Calcote ◽  
Marvin K. Harris
Keyword(s):  
Degree Day ◽  
Lepidoptera Pyralidae

Pupal Development and Adult Emergence Patterns of the Mexican Rice Borer (Lepidoptera: Pyralidae)

1995 ◽  
Vol 24 (1) ◽  
pp. 76-87 ◽  
Author(s):  
D. W. Spurgeon ◽  
P. D. Lingren ◽  
J. R. Raulston ◽  
T. N. Shaver
Keyword(s):  
Adult Emergence ◽  
Pupal Development ◽  
Emergence Patterns ◽  
Lepidoptera Pyralidae ◽  
Mexican Rice Borer

Phenology of the sugar beet weevil, Bothynoderes punctiventris Germar (Coleoptera: Curculionidae), in Croatia

2018 ◽  
Vol 109 (4) ◽  
pp. 518-527
Author(s):  
Z. Drmić ◽  
M. Čačija ◽  
H. Virić Gašparić ◽  
D. Lemić ◽  
R. Bažok
Keyword(s):  
Sugar Beet ◽  
Dynamic Models ◽  
Developmental Stages ◽  
Adult Population ◽  
Regional Scale ◽  
Adult Emergence ◽  
Soil Samples ◽  
Population Characteristics ◽  
Degree Day ◽  
Development Threshold

AbstractThe sugar beet weevil (SBW), Bothynoderes punctiventris Germar, 1824, is a significant pest in most of Eastern Europe. Here, the SBW is described and its seasonal activity characterized, in terms of its different developmental stages in relation to Julian days (JDs), degree-day accumulations (DDAs), and precipitation, as a key to improving monitoring and forecasting of the pest. The phenology and population characteristics of SBW were investigated in sugar beet fields in eastern Croatia over a 4-year period (2012–2015). By using the degree-day model (lower development threshold of 5°C, no upper development threshold, biofix 1 January), the first emergence of overwintering adults was determined as becoming established when the DDA reached 20. The adult emergence was completed when the DDA reached 428. SBW males emerged first, following which the females dominated the adult population. Overwintering adults were present in the field until early July. In August, adults of the offspring generation began to appear. The eggs laid by the overwintering generation required, on average, 10–15 days to develop into larvae; however, eggs were found in soil samples over a period of 102 days (between JDs 112 and 214). Larvae were present in the soil samples over a period of a maximum of 143 days (the first larvae were established on JD 122 and the last one on JD 265), and pupae were established in the soil over a period of 102 days (between JDs 143 and 245). This study provides important data for understanding SBW population dynamics and developing potential population dynamic models for pest forecasting on a regional scale.

scholarly journals Pengaruh Suhu terhadap Perkembangan Pradewasa Parasitoid Eriborus argenteopilosus Cameron (Hymenoptera: Ichneumonidae)

2012 ◽  
Vol 13 (3) ◽  
pp. 250
Author(s):  
Novri Nelly ◽  
Trimurti Habazar ◽  
Rahmat Syahni ◽  
Damayanti Buchori
Keyword(s):  
Survival Rate ◽  
Temperature Effect ◽  
Development Time ◽  
Degree Days ◽  
Degree Day ◽  
Adult Parasitoid ◽  
Different Temperatures ◽  
Lepidoptera Pyralidae

Temperature effect on development time of the preadult parasitoid Eriborus argenteopilosus Cameron(Hymenoptera: Ichneumonidae) were studied to know development time, degree days and survival rate.Crocidolomia pavonana (Fabricius)(Lepidoptera: Pyralidae) larvae was exposed to E. argenteopilosus female andreared at four different temperatures i.e 160C, 200C, 250C and 300C. Data were analyzed using anova and linearregression to calculate degree day. At 200C E. argenteopilosus showed the highest degree day and survival rate(18.67 %), while at 300C nothing adult parasitoid emergenced. Degree day to development time of parasitoid attemperature 200C i.e fase egg-adult: 300.05; egg-pupae 173.35; pupae-adult 171.

Degree-day model for timing insecticide applications to control Dioryctria amatella (Lepidoptera: Pyralidae) in loblolly pine seed orchards

2002 ◽  
Vol 134 (2) ◽  
pp. 255-268 ◽  
Author(s):  
James L. Hanula ◽  
Gary L. DeBarr ◽  
Julie C. Weatherby ◽  
Larry R. Barber ◽  
C. Wayne Berisford
Keyword(s):  
South Carolina ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Ease Of Use ◽  
Cumulative Number ◽  
Seed Orchards ◽  
Seed Damage ◽  
Degree Day ◽  
Spring Generation ◽  
Lepidoptera Pyralidae

AbstractBecause Dioryctria amatella (Hulst) is a key pest in loblolly pine, Pinus taeda L. (Pinaceae), seed orchards in the southeastern United States, improved timing of insecticide applications would be valuable for its control. To time two fenvalerate (Pydrin® 2.4 EC) applications we tested four variations of a degree-day model that was developed to predicted when various proportions of D. amatella eggs would hatch during the spring generation. We compared reductions in Dioryctria spp. cone damage to unsprayed checks and a standard operational spray regime of four monthly applications of fenvalerate. In addition, we examined seeds from healthy cones to determine if sprays to control D. amatella also reduced seed damage caused by Leptoglossus corculus Say (Heteroptera: Coreidae) and Tetyra bipunctata (Herrich-Schäffer) (Heteroptera: Scutelleridae). Trials were conducted from 1984 to 1986 in two orchards in South Carolina and one in Alabama. Degree-day accumulations (threshold = 11 °C) were begun on the day when the cumulative number of male D. amatella equaled or exceeded five captured in 15 Pherocon 1C® traps baited with 100 μg of Z-11-hexadecenyl acetate. One application per year was insufficient to control D. amatella or reduced seed-bug damage. Two sprays based on D. amatella phenology significantly reduced coneworm and seed bug damage, and were as effective as four sprays applied monthly. None of the treatments reduce spring cone losses, which are primarily caused by Dioryctria merkeli Mutuura and Monroe. Several variations of the model performed well, but we suggest that the best, based on efficacy and ease of use, was when sprays were applied immediately after five males were caught (degree-day = 0) and again when the model predicted 50% of the spring generation eggs had hatched.

The influence of temperature and humidity on the life-cycle of Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae)

1981 ◽  
Vol 71 (2) ◽  
pp. 171-181 ◽  
Author(s):  
P. D. Cox ◽  
L. A. Crawford ◽  
G. Gjestrud ◽  
C. H. Bell ◽  
C. R. Bowley
Keyword(s):  
Adult Stage ◽  
Rapid Development ◽  
Adult Emergence ◽  
Corcyra Cephalonica ◽  
Adult Males ◽  
Egg Hatch ◽  
Cold Tolerant ◽  
Low Humidity ◽  
Lepidoptera Pyralidae ◽  
Egg Period

AbstractThe development of a stock of Corcyra cephalonica (Stnt.) from Burma was followed carefully on a diet of wheatfeed, glycerol and yeast at constant temperatures ranging from 15 to 37°C and humidities from 15 to 90% RH. Two other stocks, from Nigeria and Malawi, were also studied under a few conditions. Limits for complete development from egg hatch to adult emergence were about 17 and 35°C at 70% RH. At 15°C, all larvae died early in development, but at 37·5°C a few managed to pupate. Highest survival and most rapid development occurred at 30–32·5°C and 70% RH. Development was completed in the range 15–80% RH, but few adults emerged at 15% RH and none at 90% RH unless a mould-inhibitor was present in the food. No second-generation larvae were obtained from adults reared and kept at 20°C and 70% RH. Egg period was influenced by temperature but not by humidity in the range 20–80%, RH. Eggs hatched at temperatures from 17·5 to 32·5°C. Hatch was adversely affected by low humidity, and very few hatched at 20% RH. Considerable variation in the rate of egg hatch between the three stocks may have been due to differences in the length of time each stock had been reared in the laboratory. Cold tolerance of eggs of the Nigerian stock was low. All eggs died at 10°C after a seven-day exposure, and at 15°C, although a few 0–1-day-old eggs exposed for 14 days hatched, none completed development to the adult stage. Although older eggs were slightly more cold-tolerant than younger ones at 10°C, they were less so at 15°C. Adult males tended to emerge earlier and live longer than unmated females. Adults of the recently collected Malawi stock were heavier and lived longer than those of the Burma stock that had been reared in the laboratory for many generations.

Modeling adult emergence and fecundity of factitious hosts under different food sources supports massive egg production management

2017 ◽  
Vol 108 (2) ◽  
pp. 150-157 ◽  
Author(s):  
J. Tavares ◽  
L. Silva ◽  
L. Oliveira
Keyword(s):  
Mass Production ◽  
Egg Production ◽  
Production Management ◽  
Food Source ◽  
Adult Emergence ◽  
Food Sources ◽  
Food Type ◽  
Emergence Patterns ◽  
Lepidoptera Pyralidae ◽  
And Behavior

AbstractEphestia kuehniella(Lepidoptera, Pyralidae) andSitotroga cerealella(Lepidoptera, Gelechiidae) are important factitious hosts used for production of biological control agents. Their differences in terms of biology and behavior require adjustments in their mass production, particularly when using corn or barley as food in grain or in bran. We modeled adult emergence, oviposition period and egg production along time after emergence, as a function of the food source. Significant differences between hosts or food type were found for these variables and for adult weight but not for sex ratio. Our results confirm the possibility of mass production of these hosts using corn or barley as food source. Integrating adult emergence patterns and age specific fecundity patterns into a single model, it is clear that rearingE. kuehniellaon barley would result in the highest egg output in much shorter time thanE. kuehniellaon corn orS. cerealellaon barley.

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