as for malaria.. two facts ...
1) Only the female mosquito carries the disease, as it's not easy to spot the difference between the M or F you may want to rely more on,
2) Mosquitoes will appear at around sunset so the risk is predominantly evening and night time.. Cover exposed parts as much as practical, ie. no T shirts and shorts after the sun sets, and dab some repellent on ankles, wrists and face..