New reports of pathogen spectrum associated with bulb rot and their interactions during the development of rot in tulip

Table 4 Pathogen-Pathogen interaction of different pathogens associated with bulb rot of tulip on PDA.

Treatment	Type of interaction	Average Radial growth covered (mm)	Percentage mycelial inhibtion*	Inhibition zone* (mm)
Fusarium solani vs. Penicillium chrysogenum	Antibiosis	46.00	48.88	5.00
Fusarium solani vs. Botrytis tulipae	Merging	43.00	52.22	0.00
Fusarium solani vs. Aspergillus niger	Antibiosis	41.00	54.11	8.50
Penicillium chrysogenum vs. Botrytis tulipae	Deadlock	35.20	61.11	0.00
Penicillium chrysogenum vs. Aspergillus niger	Antibiosis	30.00	66.66	5.40
Botrytis tulipae vs. Aspergillus niger	Deadlock	38.00	57.49	0.00
Fusarium solani vs. Penicillium chrysogenum vs. Botrytis tulipae	Deadlock^FP, Merging^FB	33.5	62.77	0.00
Fusarium solani vs. Penicillium chrysogenum vs. Aspergillus niger	Antibiosis^FP Antibiosis^FA	33.00	63.33	5.00^FP 11.50^FA
Fusarium solani vs. Aspergillus niger vs. Botrytis tulipae	Antibiosis^FA, Merging^FB	25.00	71.22	11.50^FA
Botrytis tulipae vs. Penicillium chrysogenum vs. Aspergillus niger	Deadlock^BP, Deadlock^BA,	44.50	50.55	0.00
Fusarium solani vs. Penicillium chrysogenum vs. Botrytis tulipae vs. Aspergillus niger	,Merging^FB, Antibiosis^FA	24.00	73.33	11.50^FA
Control

F, P, B and A denote Fusarium solani, Penicillium chrysogenum, Botrytis tulipae and Aspergillus niger, respectively
*Denotes average

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