Prof.P.H. Gregory was an outstanding scientist who carried our several monumental works in understanding airborne microbes more on modern scientific basis. Many of the Indian aerobiologists like Prof. T. Sreeramulu, Prof. S.T. Tilak, Prof. B.P.R. Vittal were fortunate to imbibe training directly under Prof. Gregory. Hence to pay homage to Prof. Gregory Indian Aerobiological Society had unanimously decided to institute Prof. P.H. Gregory Award for three best oral presentation by young scientists below 35 years of age to encourage their research works. This award was instituted in the 4th National Conference of Indian Aerobiological Society(IAS) in 1986 at Magadh University, Bodh Gaya at the initiative of Prof. K.B. Mishra (Magadh University), the Organising Secretary of the Conference. The first recipients of 1st. 2nd and 3rd prizes of Prof. P.H. Gregory Award of the 4th National Conference of Indian Aerobiological Society were Dr. A.H. Rajasab (Gulberga University), Dr. Swati Gupta Bhattacharya (Bose Institute) and Dr. Anupam Sinha (Magadh University). Since then three young researchers have been awarded Prof.P.H. Gregory Award with a medal and a certificate in every National Conference of IAS.

Prof. T. Sreeramulu – an internationally reputed Indian aerobiologist – did his Ph.D under the guidance of Prof. P.H. Gregory at Rothamsted Experimental Station, Herts, England. He was one of the pioneer scientists in the field of aerobiology in relation to plant pathology in India. Indian Aerobiological Society unanimously decided to honour Prof. Sreeramulu by organising oration lecture by the eminent scientists in each Conference of IAS. In this context, Prof. S.N. Agashe, first Secretary – Treasurer of IAS, paid Rs. 25,000 to meet expense of oration lecture. The list of Prof. T. Sreeramulu Oration Lectures is as follows:

Prof. T. Seeramulu Oration Lecture Delivered by Scientists of Indian Aerobiological Society

Prof. Sunirmal Chanda, an internationally acclaimed palynologist and aerobiologist, did his doctorate degree under Prof. F. Firbas of the University of Göttingen, Germany. Later, he worked in various aspects of palynology under Prof. G. Erdtman, Swedish Museum of Natural History, Stockholm and Knut Faegri, University of Bergen, Norway. Prof. Chanda was the Founder President of Indian Aerobiological Society and was also elected President of the International Association for Aerobiology for a term of five years (1985 – 1990) and presided over the 4th International Aerobiological Conference held in Stockholm in 1990.It was quite natural to honour Prof. S. Chanda by organising Memorial lecture in his memory. Prof.Sunirmal Chanda Memorial Lecture was instituted in the 18th National Conference of Indian Aerobiological Society in 2015 at Tumkur University, Karnataka at the sole initiative of Prof. A.H. Rajasab, the Vice-Chancellor of Tumkur University as well as Organiser of the Conference. In the 19th Conference of IAS, Prof.Kashinath Bhattacharya and Prof. Swati Gupta Bhattacharya (Ph.D students of Prof.Chanda) organised this memorial lecture. In the 20th Conference of IAS at Amravati University Prof. Kashinath Bhattacharya and Prof. Swati Gupta Bhattacharya, students of Prof. Chanda donated Rs. 25,000 to meet the expenses of Prof.Sunirmal Chanda Memorial lecture. The list of speakers of Prof. S. Chanda Memorial lecture is as follows:

Prof. Sunirmal Chanda Memorial Lecture Delivered by Scientists o Indian Aerobiological Society

Prof. S.T. Tilak, an internationally renowned Indian aerobiologist and the first Vice-President of the Indian Aerobiological Society (IAS), completed his Ph.D. under the guidance of Prof. M. N. Kamath at Agharkar Research Institute, Pune. He was a distinguished authority on the taxonomy of Ascomycotina. Prof. Tilak was inspired by Prof. T. Sreeramulu, a student of Prof. K. C. Mehta, whom he met at Andhra University, Waltair. In 1965, he received advanced training in aerobiology from Prof. P. H. Gregory at Rothamsted Experimental Station, Harpenden, UK.During his tenure at Marathwada University, Aurangabad, Prof. Tilak conducted extensive aerobiological research. He also developed a volumetric air sampler called, ‘Tilak sampler’. Dr. Tilak supervised over 80 doctoral students and published approximately 300 research papers in esteemed international and national journals. Additionally, he authored 16 books on aerobiology, including 10 in English and 6 in Marathi.

In recognition of his contributions, the Indian Aerobiological Society decided to honor Prof. S.T. Tilak by organizing an oration lecture at each IAS conference. To support this initiative, Prof. Tilak's students contributed Rs. 25,000. The list of Prof. S.T. Tilak Memorial Lectures is as follows:

Prof. S. T. Tilak Memorial Lecture Delivered by Scientists of Indian Aerobiological Society

Prof. A. Ramalingam, a renowned mycologist and plant pathologist, completed his Ph.D. under the guidance of Prof. T. Sreeramulu, known as the "Father of Indian Aerobiology." Following a three-year tenure at Gauhati University in Assam, Dr. Ramalingam joined the Department of Botany at Mysore University, where he became a Professor. He later moved to Karnataka University, Dharwar, where he served until his retirement in 1996. Dr. Ramalingam also conducted aerobiology research at Rothamsted Experimental Station in the U.K. He is remembered as an inspiring teacher, innovative researcher, and a great rationalist thinker.

After retirement, Dr. Ramalingam established the "Dr. Ajay Memorial Drinking Water Foundation" in his home to honor his late son. He focused on studying water pollution in and around Mysore. Throughout his career, he guided 15 Ph.D. students and published over 100 research papers in prestigious national and international journals.

To honor his legacy, the Indian Aerobiological Society decided to organize a Memorial Lecture in his name at each IAS Conference. Prof. A.H. Rajasab, the illustrious student of Prof. A. Ramalingam contributed Rs. 25,000 to fund these oration lectures. The list of Prof. A. Ramalingam Memorial Lectures is as follows:

Prof. A. Ramalingam Memorial Lecture Delivered by Scientists of Indian Aerobiological Society

Dr. Nandini Ghosh, a promising researcher in Aerobiology and allergy, and a passionate academician, tragically passed away at the age of 35. Her pioneering Ph.D. work under the supervision of Prof. Swati Gupta Bhattacharya at Bose Institute, Kolkata on sunflower pollen allergens using immunochemical techniques and mass spectrometry was highly acclaimed, earning her recognition and awards from the European Academy of Allergy and Clinical Immunology (EAACI). Dr. Ghosh also succeeded in purifying and characterizing the allergenic molecule Hel a 6. A dedicated member of various academic organizations, including the World Allergy Organisation and the Indian Aerobiological Society, she joined department of Microbiology, Vidyasagar University as an Assistant Professor in 2020. Shortly after, she secured SERB Core Research Grant funding and established her laboratory, where she worked on developing an allergy vaccine with broad neutralizing capacity against pectate lyase allergens. In memory of the late Dr. Nandani Ghosh (a Fellow of IAS), her father, Mr. Sudip Ghosh, donated Rs. 3 lakh to the Indian Aerobiological Society. To honor Dr. Nandini Ghosh's significant contributions in Aerobiology and allergy, the IAS will organize a Memorial Lecture at each IAS conference, beginning with the 23rd IAS conference in Purulia, West Bengal.

Dr. Nandini Ghosh Memorial Lecture Delivered by Scientists of Indian Aerobiological Society