Myco-metabolites as biological control agents against the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae)

Egyptian Journal of Biological Pest Control

Table 2 Effect of ethyl acetate extract on females of Tetranychus urticae (after 72 h exposure)

	Control	5 (mg/ml)	10 (mg/ml)	20 (mg/ml)	30 (mg/ml)	F value	LC₅₀ (mg/ml)	Slope
Aspergillus melleus
Mean (no. of dead mites) ± SE	0.0^e ± 0.0	3.67^d ± 0.33	11.00^c ± 1.15	14.33^b ± 0.33	18.33^a ± 1.67	65.74***	10.27	2.738
% of dead mites	0.0	18.33	55.00	71.67	91.67	–	10.27	2.738
Emericella nidulans
Mean (no. of dead mites) ± SE	0.0^d ± 0.0	1.67^d ± 0.67	5.33^c ± 0.88	14.00^b ± 1.00	16.33^a ± 0.33	115.31***	14.68	3.052
% of dead mites	0.0	8.33	26.67	70.00	81.67	–	14.68	3.052
Chaetomium globosum
Mean (no. of dead mites) ± SE	0.0^c ± 0.0	0.67^c ± 0.67	1.33^c ± 0.33	7.00^b ± 1.15	15.33^a ± 1.20	62.96***	22.40	3.240
% of dead mites	0.0	3.33	6.67	35.00	76.67	–	22.40	3.240
Aspergillus terreus
Mean (no. of dead mites) ± SE	0.0^c ± 0.0	0.33^c ± 0.33	0.67^c ± 0.33	4.00^b ± 0.58	11.33^a ± 0.33	171.83***	33.05	2.898
% of dead mites	0.0	1.67	3.33	20.00	56.67	–

Values are mean no. of dead mites ± standard error of three replicates. df = 10. Different letters in the same row indicate a significant difference according to Duncan’s multiple range test
***Values are significant at P = 0.05 levels