Fall Movement Patterns of the Egyptian Alfalfa Weevil, Hypera brunneipennis,1 in 1970

Cothran, Warren R.; Christensen, J. B.; Summers, Charles G.

doi:10.1093/aesa/65.3.769

Cited by 3 publications

(3 citation statements)

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“…When studying the biodiversity of insects in alfalfa fields in the oasis of Farafra and the Bahariya Oasis (Western Desert, Egypt), Egyptian alfalfa weevil (EAW) H. brunneipennis were collected, threatening the fields of alfalfa cultivation in these areas. (Usama et al 2014) as classified in Central Valley, California, one of the major serious lesions of the alfalfa crop, causing damage to alfalfa cultivation areas in the state (Cothran et al 1972). Distribution for the alfalfa weevil, Hypera postica (Gyllenhal), was determined for the five major alfalfa-growing regions of New Mexico.…”

Section: Introductionmentioning

confidence: 99%

Population Dynamics and Seasonal Development of the Egyptian Alfalfa Weevil, Hypera brunneipennis (Boh.), (Coleoptera: Curculionidae) in El-Farafra Oasis, New Valley Governorate, Egypt

El-Sheikh

2019

Journal of Plant Protection and Pathology

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Egyptian Alfalfa Weevil (EAW) pose great danger in recent years of alfalfa cultivation areas in El-Farafra Oasis, New Valley governorate, a crop that has an important role in combating desertification in terms of soil stabilization and increase fertility in modern reclamation areas, the population density of damaging stages of the EAW, Hypera brunneipennis (Boh.) in standing Alfalfa was estimated by conducting periodic survey during two successive years. Aestivated weevils migrated from aestival shelter by the last week of November and its population attained the maximum by the third week of March. Larval stage appeared during first and second week of February 2016 and 2017 respectively and lasted until the start of May. Population size of developing adults was closely correlated with larval population. Peaks of larva and newly emerged weevils occurred on 3 st and 20 th March 2016 and came one and two weeks later in 2017. All weevils developed in summer were obliged to enter summer diapauses (aestivation) during mid-May the influence of prevailing high temperature and long days. The effect of weather factors viz: daily mean temperature, daily mean relative humidity and day-length on the population density of adult, abundance and summer diapauses was statistically discussed. This recent study proved that the insect had one generation in the field per year.

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Section: Introductionmentioning

confidence: 99%

Population Dynamics and Seasonal Development of the Egyptian Alfalfa Weevil, Hypera brunneipennis (Boh.), (Coleoptera: Curculionidae) in El-Farafra Oasis, New Valley Governorate, Egypt

El-Sheikh

2019

Journal of Plant Protection and Pathology

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“…Figure 1 depicts the daily decision path for the model, and which is used to simulate the year-long phenology of both alfalfa and alfalfa weevil development. Cothran et al (1972) and Christensen et al (1974) For example, HAY= 1 means that the alfalfa is growing, while EAW= 1 means that the adult weevils are in aestivation.…”

Section: Introductionmentioning

confidence: 99%

“…In autumn, the weevils begin to leave aestivation and invade alfalfa to feed and oviposit. Cothran et al (1972) and Christensen et al (1974) have studied this migration. Clusters of eggs are deposited in hollow green and dried stems from late autumn to early spring.…”

Section: Introductionmentioning

confidence: 99%