TIME-MORTALITY FOR FRUIT FLIES (DIPTERA: TEPHRITIDAE) EXPOSED TO INSECTICIDES IN LABORATORY

Raga, A.; Sato, M.E.

doi:10.1590/1808-1657v73p0732006

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Artigo Científico • Arq. Inst. Biol. 73 (1) • Jan-Mar 2006 • https://doi.org/10.1590/1808-1657v73p0732006 copy

TIME-MORTALITY FOR FRUIT FLIES (DIPTERA: TEPHRITIDAE) EXPOSED TO INSECTICIDES IN LABORATORY

TEMPOS LETAIS DE MOSCAS-DAS-FRUTAS (DIPTERA: TEPHRITIDAE) EXPOSTAS A INSETICIDAS EM LABORATÓRIO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Laboratory trials were conducted to measure the mortalities caused by six organophosphate and two pyrethroid insecticides against Ceratitis capitata (Wied.) and Anastrepha fraterculus (Wied.) adults under two systems: cover sprays and toxic baits. Differences were detected in terms of susceptibility for both fruit fly species to the insecticides. Deltamethrin and fenpropathrin sprayed on the insects presented the lowest lethal times (LT₅₀) for C. capitata (≤ 5.2 min). Among the organophosphates, ethion and malathion were the most toxic to this species (LT₅₀ ≤ 10.2). Fenpropathrin and malathion showed the lowest values of LT₅₀ for A. fraterculus females (3.3 and 4.7 min, respectively) under cover spray. For C. capitata females treated with toxic baits, fenpropathrin and trichlorfon showed the lowest LT₅₀ (< 5.0 min) and chlorpyrifos presented the highest LT₅₀ (65.7 min). For A. fraterculus females, trichlorfon and dimethoate showed the lowest LT_50s (7.9 and 8.8 min, respectively). Ceratitis capitata was more tolerant to malathion, chlorpyrifos and dimethoate than

KEY WORDS
Insecta; Ceratitis capitata ; Anastrepha fraterculus ; mortality

Treatment	Species	Sex	LT₅₀ (min)	Slope ± SE X² df
Deltamethrin	Af	Females	5.25 (4.26 – 6.08)	4.37 ± 0.55	0.87	2
	Cc	Females	3.89 (2.35 – 5.13)	2.70 ± 0.21	1.74	3
	Af	Males	5.18 (4.13 – 6.04)	4.17 ± 0.65	1.61	2
	Cc	Males	2.87 (1.20 – 4.25)	2.32 ± 0.22	1.83	3
Ethion	Af	Females	15.9 (13.0 – 20.4)	1.88 ± 0.21	1.12	3
	Cc	Females	7.58 (5.88 – 9.08)	2.45 ± 0.11	8.47	5
	Af	Males	16.3 (14.9 – 17.6)	5.42 ± 0.83	4.10	2
	Cc	Males	9.26 (7.07 – 11.2)	2.01 ± 0.12	5.97	4
Chlorpyrifos	Af	Females	13.2 (11.8 – 14.4)	5.43 ± 0.86	4.92	2
	Cc	Females	13.5 (11.6 – 15.5)	2.50 ± 0.11	9.08	5
	Af	Males	10.7 (9.36 – 12.01)	3.66 ± 0.27	1.63	3
	Cc	Males	15.9 (14.1 – 17.6)	3.87 ± 0.16	9.43	5
Malathion	Af	Females	4.67 (3.56 – 5.53)	4.13 ± 0.55	0.46	2
	Cc	Females	10.2 (8.96 – 11.4)	3.87 ± 0.19	6.67	3
	Af	Males	4.68 (3.48 – 5.64)	3.66 ± 0.87	3.43	2
	Cc	Males	8.49 (7.31 – 9.60)	3.79 ± 0.16	5.89	4
Trichlorfon	Af	Females	16.3 (13.3 – 22.7)	2.14 ± 0.33	1.43	2
	Cc	Females	13.2 (11.5 – 14.8)	3.01 ± 0.12	9.34	5
	Af	Males	9.38 (8.30 – 10.4)	4.59 ± 0.61	4.17	2
	Cc	Males	14.6 (12.8 – 16.2)	4.02 ± 0.19	5.42	4
Fenthion	Af	Females	7.59 (5.68 – 9.21)	2.26 ± 0.15	0.48	3
	Cc	Females	14.0 (12.2 – 15.8)	2.90 ± 0.14	6.96	4
	Af	Males	6.28 (4.83 – 7.58)	2.74 ± 0.52	4.89	3
	Cc	Males	13.3 (11.8 – 14.6)	4.92 ± 0.22	5.10	4
Fenpropathrin	Af	Females	3.29 (2.01 – 5.60)	0.93 ± 0.27	1.42	3
	Cc	Females	5.20 (3.93 – 6.26)	3.32 ± 0.21	1.25	3
	Af	Males	5.07 (3.94 – 6.01)	3.77 ± 0.75	1.98	2
	Cc	Males	3.69 (2.16 – 4.91)	2.73 ± 0.22	1.06	3
Dimethoate	Af	Females	7.91 (5.20 – 10.1)	1.61 ± 0.28	3.73	4
	Cc	Females	16.2 (14.8 – 17.4)	5.30 ± 0.19	4.81	5
	Af	Males	6.58 (4.64 – 8.26)	2.07 ± 0.47	9.11	4
	Cc	Males	15.0 (13.6 – 16.3)	5.14 ± 0.27	2.42	3

Treatment	Species	Sex	LT₅₀ (min)	Slope ± SE X² df
Deltamethrin	Af	Females	49.3 (42.8 – 55.7)	2.70 ± 0.26	8.07	7
	Cc	Females	9.33 (4.51 – 13.2)	2.56 ± 0.23	0.97	3
	Af	Males	47.4 (41.2 – 53.5)	2.78 ± 0.20	4.24	7
	Cc	Males	6.81 (1.52 – 11.1)	2.41 ± 0.33	1.12	2
Ethion	Af	Females	71.1 (64.8 – 78.3)	4.18 ± 0.34	7.45	4
	Cc	Females	49.4 (43.2 – 55.7)	2.85 ± 0.09	11.9	6
	Af	Males	61.5 (55.0 – 68.0)	3.26 ± 0.32	10.93	6
	Cc	Males	44.2 (39.0 – 49.5)	3.31 ± 0.11	9.01	5
Chlorpyrifos	Af	Females	17.5 (11.6 – 22.9)	1.88 ± 0.26	5.23	6
	Cc	Females	50.1 (45.1 – 55.3)	3.93 ± 0.13	8.51	5
	Af	Males	17.3 (12.1 – 22.1)	2.19 ± 0.30	5.32	5
	Cc	Males	65.7 (59.8 – 71.7)	4.38 ± 0.14	6.87	5
Malathion	Af	Females	9.68 (4.15 – 15.5)	1.42 ± 0.29	7.32	6
	Cc	Females	37.9 (33.0 – 42.8)	3.13 ± 0.11	3.66	5
	Af	Males	7.33 (2.92 – 11.9)	1.80 ± 0.24	1.70	5
	Cc	Males	33.5 (28.2 – 38.7)	2.61 ± 0.10	5.45	5
Trichlorfon	Af	Females	7.93 (5.38 – 9.44)	5.41 ± 0.96	0.36	2
	Cc	Females	≤ 5	-	-	-
	Af	Males	7.66 (5.05 – 9.28)	5.02 ± 0.74	0.59	2
	Cc	Males	≤ 5	-	-	-
Fenthion	Af	Females	29.3 (25.0 – 33.4)	3.36 ± 0.37	6.38	5
	Cc	Females	19.8 (15.7 – 23.5)	3.02 ± 0.18	2.01	3
	Af	Males	25.1 (21.9 – 28.2)	4.59 ± 0.54	2.37	2
	Cc	Males	23.3 (19.6 – 26.6)	3.56 ± 0.19	2.31	3
Fenpropathrin	Af	Females	35.7 (29.1 – 41.9)	2.21 ± 0.31	9.91	6
	Cc	Females	≤ 5	-	-	-
	Af	Males	28.9 (24.1 – 33.4)	2.91 ± 0.23	4.81	6
	Cc	Males	≤ 5	-	-	-
Dimethoate	Af	Females	8.79 (4.29 – 12.6)	2.67 ± 0.71	3.60	2
	Cc	Females	20.6 (17.4 – 23.5)	3.95 ± 0.21	1.22	3
	Af	Males	5.33 (0.84 – 9.85)	2.15 ± 0.60	1.09	2
	Cc	Males	33.3 (27.7 – 37.7)	4.21 ± 0.27	4.84	3

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