Table 1 Whole Farm Project

Table 1. 1996 predicted PAD, scab infection periods, no. unprotected infection periods, foliar and fruit scab buildup, and 1997 predicted PAD in the seven orchards participating in the Vermont and New Hampshire 'Whole Farm' Apple Scab IPM Project

							1996 Scab assessment (% scabbed)
	^a1996	^bFirst	^cTotal	1996 Scab infection periods			June		July		Sept.	^f1997	^g1997
Orchard	PAD	fungicide	fungicide	^{dNo. not}	Total	Total	Cluster	Terminal	Terminal			PAD	delayed-
ID	prediction	application	applications	protected	primary	secondary	leaves	leaves	leaves	Fruit	Fruit	prediction	spray?
A	4,288	1/2" Green	10	4	9	15	1.6	0.6	3.1	1.5	0.7	5,022	No
B	108	TC	7	4	8	16	3.7	0.3	1.3	0.5	^{e0.4 E 11.6 M}	2,000	No
C	111	TC	8	5	9	15	8.2	0.3	6.0	3.0	1.8	100,000	No
D	11	Early Pink	9	4	8	16	<0.1	<0.1	0.2	0.0	<0.1	141	Yes
E	34	Early Pink	8	3	9	16	1.6	<0.1	0.3	0.2	0.3	509	^hYes
F	390	Full Pink	5.5	3	6	17	0.7	<0.1	<0.1	0.3	0.5	1,284	^hYes
G	250	OC	9	3	6	17	4.4	0.3	0.4	0.5	0.2	484	Yes
^{aPrediction of potential ascospore dose (PAD) for 1996 determined after an assessment of foliar scab in autumn 1995.}
^{bPhenological stage of fruit bud development when first fungicide applied. TC = tight cluster, OC = open cluster.}
^{cTotal number of fungicide applications in 1996. Included are applications that may have been aimed primarily at controlling summer diseases rather than scab.}
^{dNumber of primary infection periods left unprotected with fungicide in 1996 before the first fungicide was applied.}
^{eAssessment of scabbed fruit on Empire (E) and McIntosh (M).}
^{fPrediction of potential ascospore dose (PAD) for 1997 determined after an assessment of foliar scab in autumn 1996.}
^{gRecommendation to continue the delayed-spray strategy in 1997 based on the prediction of PAD for 1997.}
^{hSanitation practices should be conducted in parts of the orchard in 1997.}

Last Updated on 8/19/97
By Gwendolyn Neff