Plant Disease Research
  • Year: 2015
  • Volume: 30
  • Issue: 1

Prevalence of pre-harvest fruit drop disease of citrus in Punjab and in vitro evaluation of fungicides against pathogen

  • Author:
  • Sarbjeet Kaur, Kanchan Bala Bardhan, Anil Kumar1, T.S. Chahal2
  • Total Page Count: 6
  • Page Number: 40 to 45

1Punjab Agricultural University Regional Research Station, Abohar-152161

2Punjab Agricultural University Fruit Research Station, Jalowal and Lesriwal-144303

Department of Fruit Science, Punjab Agricultural University, Ludhiana-141004

*E-mail: sarbjeetkaur@pau.edu

Online published on 25 August, 2015.

Abstract

Pathological fruit drop in citrus is a wide spread disease in Punjab and results in huge economic losses to Kinnow mandarin growers. The disease was significantly higher during second fortnight of September and first fortnight of October in Fazilka, Hoshiarpur and Ludhiana districts of Punjab. Two fungal pathogens viz. Colletotrichum gloeosporioides and Diplodia natalensis were found to be associated with the fruit drop disease. Among the systemic fungicides, thiophanate methyl (25ppm), tebuconazole (50ppm) and difenconazole (50ppm) resulted in complete inhibition of mycelial growth of C. gloeosporioides and D. natalensis. Copper hydroxide (200ppm) and zinc dimethyl dithiocarbamate (200ppm) were found to be the most effective non-systemic fungicides in completely (100%) checking the growth of pathogens.

Keywords

Pre-harvest fruit drop, citrus, prevalence, fungicides