Brontispa is a serious pest of coconut in the Philippines, having attacked more than 1.6 million coconut trees nationwide. Two years ago, 26 provinces were quarantined due to infestation to save the coconut industry- a vital component of the export economy.
Because of the emergency situation, the Philippine Coconut Authority (PCA) initially recommended the injection of pesticide into the trunks of coconut areas with severe and widespread infestation. However, the said chemicals were not yet registered for use in the country.
Thus, Dr. Leonila Varca and Mr. Lorenzo Fabro of UPLB-CA's National Crop Protection Center-Crop Science Cluster, in cooperation with the PCA in Quezon province, determined whether toxic substances were present in food products derived from coconuts given trunk injections of pesticide.
According to the group's study, the pesticides, when administered correctly, is effective against the larva and adult of the coconut leaf beetle. There is a need though to reapply the pesticides after 30 days in order to protect the coconut longer, thus raising concerns on possible toxicity of coconut products.
The researchers' results showed that the coconut water and coconut milk derived from trees 60 days after injection do not have any pesticide residue, and thus safe to consume. Processing the coconut into ordinary and virgin coconut oil, meanwhile, reduces pesticide concentration to almost zero.
The project, funded by the Philippine Council for Agriculture, Forestry and Natural Resources Research and Development, also noted that the said pesticides have no effect on the common earwig (Chelisoches morio)-the natural enemy of the coconut leaf beetle.
Microjet generator for highly viscous fluids
13.02.2018 | Tokyo University of Agriculture and Technology
Sweet route to greater yields
08.02.2018 | Rothamsted Research
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Life Sciences
21.02.2018 | Life Sciences
21.02.2018 | Materials Sciences