Hi buddy as you are going to appear in Indian Forest Services exam conducted by UPSC , so here I am telling you name of some of the good books name on your demand :

Cell Biology: De Robertis & Ambrose and Easy or Powar

Genetics: Strickberger or Vir Bala Rastogi

Physiology and Biochemistry: Salisbury and Ross or Fritz and Noggle

Ecology: Vir Bala Rastogi and M.S. Jayaraj and P.D. Singh

Economic Botany: Kochar or Verma

Microbiology: Powars's two books on microbiology are more than enough.

Pathology: Singh's book along with a foreign author

Cryptograms: B.R. Vasista (alage and fungi), P.C. Vashishta (Pteridophytes gymnosperms) Pandey and Trivedi (both volumes)

Embryology: Bhojwani and Bhatnagar

Plant Anatomy: Esau or B.P. Pandey

Taxonomy: Nair along with Datta


Paper-1

Lower Boiology (Algae, Fungi, Bryophyta, Pteridophyta, Gymnosperms): Singh, Pandey & Jain

Bacteria & Virus: H.C.Dubey

Microbiology: Taro & Kapoor

Plant Pathology: 1) P.D. Sharma – “Plant Pathology”; 2) R.S.Sharma – “Principles of Plant Pathology”

Economic Botany:

1) B.P. Pandey – “Economic Botany”

2) Few topics from Kochar

Plant Taxonomy: O.P.Sharma

Introduction to Botany (for Degree students): A.C.Dutta


Paper-2

Cell Biology:

1) “Cell Biology & Genetics” – P.K.Verma

2) Plant Physiology – Pandey & Sinha

3) Genetics – P.K.Gupta (for few topics)

Genetics:

1) B.D.Singh – Genetics

2) Pudan Singh – Introduction to Genetics

3) P.K.Gupta – Genetics

Plant Breeding:

1) B.D.Singh

2)Pudan Singh

Biotechnology:

B.D. Singh

Plant Physiology

1) Pandey & Sinha

2) V.K. Jain

3)Taiz & Zeiger (Photosynthesis, Respiration & Stress Physiology)

Ecology:

P.D. Singh