Predicting Spring Flight of Nantucket Pine Tip Moth (Lepidoptera: Olethreutidae) by Heat Unit Accumulation1

Applying a precise forecasting method is necessary to achieve acceptable results in integrated pest management programs. The objectives of this work were to predict the occurrence of population of Myzus persicae (Hemiptera: Aphididae) and Chrysoperla carnea (Neuroptera: Chrysopidae), determine the influence of temperature and relative humidity on their population densities and also to study the effect of five insecticides on the population of these insect species in potato plants under field conditions at Nobaria district, El-Beheira Governorate, Egypt. The populations of M. persicae and C. carnea were monitored on potato plants from February to May of 2015 and 2016 seasons. The population peaks of these insects were predicted using a degree-day model (accumulated thermal units). The obtained results revealed that the green peach aphid has nine field generations while the green lace-wing has two field generations. The general average of deviations between the expected peaks compared to the observed peaks were-1.333 and-1 days in case of M. persicae, while these averages were +3 and-1 days in case of green lace-wing in 2015 and 2016 seasons, respectively. The effect of the meteorological factors such as temperature and relative humidity on population of these insect were studied. The correlation results revealed that the incidence of M. persicae and C. carnea were significantly and positively correlated in descending order with minimum, mean, and maximum temperature degree, respectively. The efficiency of acetamiprid, thiamethoxam, pymetrozine, chlorantraniliprole and pirimicarb on M. persicae and C. carnea populations was determined. These insecticides could be arranged in ascending order as: acetamiprid > thiamethoxam > chlorantraniliprole > pymetrozine > pirimicarb for controlling the green peach aphid. While regarding their harmful effect on the C. carnea population their order became chlorantraniliprole > pirimicarb > thiamethoxam > acetamiprid > pymetrozine. These results were repeated in both seasons of study, 2015 and 2016.

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“…The following formula was used for computing the degree-days (dd's) according to Richmond et al, (1983)…”

Section: Predicting M Persicae and C Carnea Generation Peaks Using mentioning

confidence: 99%

Predicting Field Generations of The Green Peach Aphid, Myzus persicae (Sulzer) and Its Predator, Green Lace-Wing, Chrysoperla carnea (Stephens) by Using Heat Units Accumulation and Evaluation of Some Insecticides against Their Populations

Darwish

Attia

2017

Alexandria Journal of Agricultural Sciences

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“…Daily maximum and minimum temperatures which recorded and obtained from CLAC were transformed to heat units using the lower threshold temperature of (TSSM) Tetranychus urticae (where, t0 was 10.0°c with 100 unit for generate according to Herbert (1982). Degree-days units were calculated by applying Richmond et al (1983) These experiments were carried out on spider mite T. urticae infesting Potato and Tomato crops, at Beheira, Sohag and Beni Suef governorates, during September-April for ten successive seasons 2003-2015. These mites were (TSSM) two spotted spider mite: Tetranychus urticae.…”

Section: Determination Of Degree-days Units (Ddu)mentioning

confidence: 99%

Heat Unit Accumulation for The Two-Spotted Spider Mite, Tetranychus urticae (Acari: Tetranychidae) On Potato And Tomato Crops Under Climatic Changes

Maklad

Reyad

2015

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Climate change could profoundly affect the status of agricultural insect pests. This study is a predict of the two-spotted spider mite in potato and tomato cops annual generation peaks under current and expected future climate by using the relationship between the accumulated thermal heat units expressed as degreedays unit (DDU) and the population fluctuations. The results indicate the population of the predicate annual generation number and duration of T. urticae of tomato and potato crop under current and expected future climatic changes and their relationship with accumulated thermal units (degree-days units), at Beheira, Bani sweif and Sohag governorates. Under current climate mean generation numbers of T. urticae (10-12 and 12) and mean numbers days per generate (21-19 and 19) and mean degree-days units for T. urticae (170.7-170.9 and 167.4) at Beheira, Bani sweif and Sohag governorates, respectively were highly recorded compared with expected future climate in 2050s and 2100s. Meanwhile, future predicate in 2050s and 2100s, mean generation numbers (15-17 generation) were highly recorded, but mean degree-days units (165.2-172.3 unit) were highly recorded and days numbers per generate (14-17 days per generate) were less recorded compared with data of current climate, respectively.

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“…Maximum and minimum temperatures were transformed to heat units using the lower threshold temperature (t 0 ) 11.84˚C with 487.92 (DDU) (for generation of peach fruit fly) (Sharaf El-Din et al, 2007) by applying Richmond et al, (1983)…”

Section: -Determination the Thermal Units Required For Pff Developmementioning

confidence: 99%

Degree-days units and expected generation numbers of peach fruit fly Bactrocera zonata (Saunders) (Diptera: Tephritidae) under climate change in

Khalil

Abolmaaty

Hassanein

et al. 2010

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Climate change could profoundly affect the status of agricultural insect pests. This study predicts expected peach fruit fly (PFF) annual generations under current and future climate by using the accumulated thermal heat units expressed as degreedays unit (DDU). We evaluated how temperature expected to influence the annual generation numbers in three governorates of Egypt using the climate change data output from the HadCM3 model for A1 scenarios proposed by the Intergovernmental Panel on Climate Change. Results indicated that PFF in Asyout have the highest number of possible generations as compared to other locations (North Sinai and EL Beheira) under current climate to be 8 compared with 6 and 7 for other locations, respectively. Generation numbers of PFF under climate change conditions would be increased especially in Asyout governorate to 9 and 10 by 2050 and 2100, respectively. However, the expected generation numbers of PFF at 2050 and 2100 will be 8-9 and 9-10 generations per year for other two locations, respectively.

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Predicting Spring Flight of Nantucket Pine Tip Moth (Lepidoptera: Olethreutidae) by Heat Unit Accumulation1

Cited by 19 publications

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Predicting Field Generations of The Green Peach Aphid, Myzus persicae (Sulzer) and Its Predator, Green Lace-Wing, Chrysoperla carnea (Stephens) by Using Heat Units Accumulation and Evaluation of Some Insecticides against Their Populations

Predicting Field Generations of The Green Peach Aphid, Myzus persicae (Sulzer) and Its Predator, Green Lace-Wing, Chrysoperla carnea (Stephens) by Using Heat Units Accumulation and Evaluation of Some Insecticides against Their Populations

Heat Unit Accumulation for The Two-Spotted Spider Mite, Tetranychus urticae (Acari: Tetranychidae) On Potato And Tomato Crops Under Climatic Changes

Degree-days units and expected generation numbers of peach fruit fly Bactrocera zonata (Saunders) (Diptera: Tephritidae) under climate change in

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