Abundance of palm frond borer Phonapate frontalis (Fah.) (Coleoptera: Bostrichidae) with reference to potential use of garlic extract for its control in Siwa Oasis, Egypt

Egyptian Journal of Biological Pest Control

Table 1 Efficacy of methanolic garlic extract on the frond infestation percentages at Siwa date palm groves (2017 season)

Inspection date conc.	January	February	March	April	May	June	July	August	September	October	November	December	Total/year	Average/year*	Infestation (%)	Corrected (%)
Control	7	5	11	26	44	72	81	71	71	39	13	10	450	37.5 ± 8.5^a
1000 ppm	7	8	11	20	22	40	32	38	30	22	16	10	256	21.33 ± 3.33^b	56.89	43.11
2000 ppm	8	10	13	22	28	36	30	28	36	19	12	6	248	20.67 ± 3.13^b	55.11	44.89
3000 ppm	7	11	20	32	22	30	26	34	28	28	17	5	260	21.67 ± 2.83^b	57.78	42.22

*Data represented by mean ± SE and means in the same column followed by the same letter are not significantly different