Reba Goodman, Joan Abbott, Ann S. Henderson · 1987
Researchers exposed salivary gland cells from Sciara flies to various magnetic fields, including 72 Hz sine waves and pulsed signals. The magnetic field exposure increased RNA production in the cells, activating genes that were previously inactive and boosting activity in already active genes. This demonstrates that extremely low frequency magnetic fields can directly alter cellular gene expression patterns.
Sally Z. Child, Edwin L. Carstensen, Shung K. Lam · 1979
Scientists exposed fruit fly larvae to pulsed 2 MHz ultrasound to study biological effects. They found that high-intensity pulses killed larvae and caused delayed death during the pupal stage, with effects beginning at intensities above 10 W/cm². The research revealed that peak intensity matters more than average intensity for predicting biological harm.
P. S. Rai, H. J. Ball, S. O. Nelson, L. E. Stetson · 1977
Researchers exposed mealworm beetles to 39 MHz radiofrequency radiation and found it severely disrupted their ability to reproduce. Higher RF energy levels and longer exposures reduced sperm activity and prevented successful mating, leading to fewer viable eggs.
Stuart O. Nelson · 1976
Researchers measured how 9.4 GHz microwave radiation interacts with rice weevils and wheat kernels by determining their dielectric properties (how materials respond to electromagnetic fields). This 1976 study established baseline data for understanding how microwaves penetrate biological tissues and agricultural materials. The findings help explain why certain frequencies are more effective for pest control and food processing applications.
P. S. RAI, H. J. BALL, S. O. NELSON, L. E. STETSON · 1975
Researchers exposed mealworm beetles to 39 MHz radiofrequency radiation and found it significantly reduced female reproduction rates. The effects were stronger with longer exposure times and higher power levels, and surprisingly, treating males had more impact on fertility than treating females directly.
P. S. RAI, H. J. BALL, S. O. NELSON, L. E. STETSON · 1974
Scientists exposed mealworm beetles to 39 MHz radiofrequency radiation and found severe damage to both male and female reproductive organs. In females, egg cells disintegrated and ovarian tissue developed abnormal vacuoles, while in males, sperm production was disrupted and mature sperm disappeared from reproductive ducts. This early study demonstrates that RF radiation can cause structural damage to reproductive tissues in living organisms.
P. S. RAI, H. J. BALL, S. O. NELSON, L. E. STETSON · 1974
Scientists exposed mealworm beetles to 39 MHz radiofrequency fields and found severe damage to both male and female reproductive tissues. The radiation caused egg cells to disintegrate, sperm production to fail, and no mature sperm were found in the male reproductive ducts. This early study demonstrates that RF radiation can devastate reproductive function in living organisms.
Stuart O. Nelson, LaVerne E. Stetson · 1974
This 1974 research examined how different radio frequencies affect insects in stored grain products. Scientists found that 39 MHz radio waves were much more effective at killing rice weevils in wheat than the 2450 MHz frequency used in microwave ovens. The study demonstrated that lower frequencies can be more biologically effective than higher ones.
Stuart O. Nelson, Laverne E. Stetson · 1974
This 1974 study examined how radio frequency (RF) energy could be used to control insects in stored grain products. Researchers found that 39 MHz frequency was much more effective at killing rice weevils in wheat than the 2450 MHz frequency commonly used in microwave ovens. The study measured how different frequencies interact with both insects and grain to optimize pest control methods.
S. O. Nelson · 1974
This 1974 research examined how radiofrequency, infrared, and ultraviolet radiation could be used to control insects in stored food products. The study explored the potential and limitations of using electromagnetic energy as an alternative to chemical pesticides for pest management in grain storage and food processing facilities.
S. O. Nelson, L. E. Stetson · 1974
Researchers tested two radiofrequency treatments (39 MHz and 2450 MHz) to kill rice weevils in wheat grain. The 39 MHz frequency proved far more effective, achieving complete insect mortality at grain temperatures of 50°C, while the 2450 MHz frequency required 80°C temperatures. This demonstrated that lower frequencies can selectively target pests more efficiently than microwave frequencies.
Bernard Greenberg · 1972
Researchers studied soil insects (springtails and mites) living near a military ELF antenna system in Wisconsin that operated at 45-75 Hz frequencies. After two years of antenna operation, they found no significant differences in insect populations compared to control areas 7-12 miles away. The study suggests that extremely low frequency electromagnetic fields at these power levels don't harm soil arthropod communities.
P. S. Rai, H. J. Ball, S. O. Nelson, L. E. Stetson · 1972
Researchers exposed Tenebrio molitor (mealworm beetle) eggs to radiofrequency energy for 2-64 seconds and found that higher RF levels reduced hatching rates. Younger eggs (1-day-old) were more vulnerable than older eggs (3-day-old), and microscopic examination revealed damage to critical developmental structures in the embryos.
S. O. Nelson · 1972
This 1972 research investigated using various forms of electromagnetic energy as a method for controlling stored-product insects. The study examined different types of electromagnetic radiation including microwaves, radio waves, infrared, and ultraviolet radiation for their potential to manage pest insects in agricultural storage facilities.
S. O. Nelson, L. F. Charity · 1972
This 1972 study by Nelson investigated how insects and grain absorb energy from electric fields at different frequencies. The research examined the frequency-dependent dielectric properties of biological materials, showing how electromagnetic energy absorption varies with frequency in living organisms.
Stuart O. Nelson · 1972
This 1972 research examined using microwave and radiofrequency energy to control insect populations through dielectric heating. The study explored RF energy as a pest control method, investigating how electromagnetic fields could be weaponized against insects. This early work demonstrated that living organisms are vulnerable to RF energy effects.
Russell L. Carpenter, Elliot M. Livstone · 1971
Researchers exposed mealworm beetle pupae to 10 GHz microwave radiation and found that only 24% developed normally compared to 90% of unexposed controls. When they heated pupae to the same temperatures using regular heat instead of microwaves, 80% developed normally, proving the damage was caused by the microwaves themselves, not the heat they generated.
Russell L. Carpenter, Elliot M. Livstone · 1971
Researchers exposed mealworm beetle pupae to 10 GHz microwave radiation and found that 76% developed abnormally or died, compared to only 10% in unexposed controls. When they heated pupae to the same temperature using conventional heat, 80% developed normally, proving the damage was caused by the microwaves themselves, not just the heat they generated.
Russell L. Carpenter, Elliot M. Livstone · 1971
Scientists exposed mealworm beetle pupae to 10 GHz microwave radiation and found that 76% either died or developed severe abnormalities, compared to 90% normal development in unexposed controls. When researchers heated pupae to the same temperatures using conventional heat, 80% developed normally, proving the damage was caused by the microwaves themselves, not just the heat they produced.
M. A. K. Hamid, R. J. Boulanger · 1969
Researchers in 1969 developed a microwave-based method to kill three common grain insects (flour beetles, granary weevils, and rusty grain beetles) while simultaneously drying wheat. The study demonstrated that microwave energy could selectively heat and eliminate these pests without damaging the grain's quality for milling and baking. This dual-purpose approach proved cost-effective compared to chemical pesticides and gas treatments used at the time.
A. M. Kadoum, S. O. Nelson, L. E. Stetson · 1967
Researchers exposed yellow mealworm larvae to radiofrequency radiation and found that RF energy caused deadly internal heating in the insects. The thoracic region (chest area) reached the highest temperatures due to body appendages concentrating electric fields, with internal temperatures approaching lethal levels that likely caused the observed deaths.
Ahmed M. Kadoum, Harold J. Ball, LaVerne E. Stetson · 1967
Researchers exposed mealworm larvae to radiofrequency electric fields and found they lost weight progressively after treatment, with younger larvae losing more weight than older ones. The treated larvae also showed elevated oxygen consumption that persisted for days, similar to patterns seen in surgically injured larvae.
A. M. Kadoum, H. J. Ball, S. O. Nelson · 1967
Researchers exposed yellow mealworm larvae to radiofrequency electric fields at 39 MHz and found that the adult insects developed with malformed and missing legs and other appendages. The severity of deformities increased with longer exposure times, suggesting RF radiation can disrupt normal development even at non-lethal levels.
Nelson, Stuart O. · 1966
This 1966 study explored using electromagnetic radiation, radiofrequency fields, and infrared energy to control insect pests. Researchers found that gamma rays could sterilize male insects for population control, while radiofrequency fields and infrared radiation killed grain beetles without damaging the grain's nutritional value. The study also examined using light traps and sound waves for pest management.
Vernon H. Baker, Dennis E. Wiant, Oscar Taboada · 1956
This 1956 Michigan State University study examined how 12.25 cm microwaves affected granary weevils and flour beetles that commonly infest stored grain. The research was conducted in partnership with Raytheon Manufacturing Company as part of broader investigations into how electromagnetic radiation affects biological tissues. This represents some of the earliest controlled research into microwave effects on living organisms.
