Pears

Pears (Table 9). Trials on eight varieties of pears were carried out in France, Germany and Italy. As in the trials on apples the spray regimes were widely spread. When samples were taken at maturity after 3 or fewer applications of 0.023-0.3 kg ai/ha the residues of teflubenzuron were <0.66 mg/kg.

Most of the trials could not be evaluated. Only three Italian trials were approximately in accord with Swiss GAP. The residues at a 21-day PHI ranged from 0.43 to 0.71 mg/kg after 2 or 3 treatments at 0.27 kg ai/ha.

Table 9. Residues of teflubenzuron in pears from supervised trials.

Country, year	Application			PHI, days	Residues, mg/kg	Report No.
	kg ai/hl	kg ai/ha	No.
France, 1982		0.30	1	71	0.20	182653501
France, 1984	0.003	0.028-0.033	4	27	<0.05	FR84145146018A
France, 1984	0.005	0.055-0.065	4	27	<0.05	FR84145146018B
France, 1984	0.010	0.11-0.13	4	27	0.07	FR84145146018C
France, 1984	0.015	0.17-0.20	4	27	0.16	FR84145146018D
France, 1984	0.003	0.023	1	67	<0.05	FR84145146018A-D
	0.005	0.045	1	67	<0.05
	0.010	0.09	1	67	<0.05
	0.015	0.14	1	67	<0.05
France, 1984	0.011	0.12	1	80	<0.05	I8454.34.01A
France, 1984	0.015	0.17	1	80	<0.05	I8454.34.01B
France, 1984	0.007	0.11	1	71	<0.05	I8454.36.01A
France, 1984	0.008	0.15	1	71	0.06	I8454.36.01B
France, 1985	0.011	0.26	5	28	0.30	16082.86
France, 1985	0.014	0.34	5	28	0.25	16082.86
France, 1985	0.011	0.26	6	24	0.38	16082.86
France, 1985	0.014	0.34	6	24	0.38	16082.86
France, 1990	0.008	0,075	2	49	0.04	S/FR/E/90/117
	0.010	0.10	2	49	0.07
France, 1990	0.008	0.075	2	56	0.09	S/FR/E/90/118
	0.010	0.10	2	56	0.09
France, 1990	0.008	0.083	2	72	0.03	S/FR/E/90/211
	0.011	0.11	2	72	0.04
France, 1990	0.008	0.075	2	80	0.02	S7FR/E/90/441
	0.011	0.10	2	80	0.07
Germany, 1993	0.021	0.16	3	0	0.47	SHE-9308
				7	0.26
				14	0.26
				21	0.26
Italy, 1983	0.014	0.34	4	54	0.58	C83220701
Italy, 1983	0.014	0.27	2	54	0.28	C83220702
Italy, 1984	0.014	0.27	4	0	2.1	184/33/07/01
				7	1.4
				14	1.5
				21	1.3
				28	1.2
Italy, 1984	0.014	0.27	2	0	1.2	184/33/07/11
				7	0.55
				14	0.53
				21	0.43
				28	0.18
Italy, 1984	0.014	0.27	3	0	1.0	184/33/07/13
				7	0.65
				14	0.67
				21	0.60
				28	0.66
Italy, 1984	0.014	0.27	2	0	0.86	184/33/07/02
				7	0.77
				14	0.67
				21	0.71
				28	0.52

Double-underlined residues are from treatments which approximated Swiss GAP.

Stone fruits. Teflubenzuron is registered in Switzerland for stone fruits and Italy for peaches and nectarines with 1-3 treatments of 0.12 kg ai/ha and a 21-day PHI. In Poland, one treatment of 0.11 kg ai/ha and a PHI of 28 days are recommended for orchards. In Saudi Arabia two applications of 0.011 kg ai/hl are registered for peaches with a PHI of 21 days.

Cherries (Table 10). Three trials on cherries were conducted in 1991 in Germany. Two applications were made at a rate of 0.16 kg ai/ha with an interval of 14 days. Fruit samples were taken immediately after the final application and 7, 14, 21 and 28 days later. The residues declined from 0.65-1.2 mg/kg on day 0 to 0.18- 0.21 mg/kg on day 28, calculated on the whole fruit.

Table 10. Residues of teflubenzuron in cherries from supervised trials, Germany, 1991.

Application			PHI, days	Residues, mg/kg1	Report No.
kg ai/hl	kg ai/ha	No.
	0.16	2	0	0.87	SHTR.93.010 -9117-01
			7	0.38
			14	0.49
			21	0.24
			28	0.18
	0.16	2	0	1.2	SHTR.93.010 -9117-02
			7	1.2
			14	0.47
			21	0.24
			28	0.20
	0.16	2	0	0.65	SHTR.93.010 -9117-03
			7	0.76
			14	0.56
			21	0.25
			28	0.21

¹ Calculated as whole fruit including stone
Underlined residues are from treatments which approximate Swiss GAP.