• DD Graphs for:
• Codling Moth
• Oriental Fruit Moth
• Plum Curculio
• Grape Berry Moth
• Biology & Information About Pests:
• Table of Degree Days for Fayetteville
• Trap Counts for Codling Moth, Grape Berry Moth, Oriental Fruit Moth

Biology & Information About Pests:

Oriental fruit moths were 1st caught in pheromone traps on 9 April (see picture of OFM adult below):
1st hatch was predicted between 8 to 20 May (400 to 700 degree days at base 45F, see below).
Second hatch is predicted to occur between 12 to 24 June or 1300-1700 DD
3rd hatch began 14 July and will continue until late
September - typically, as long as you get 5 or more
moths/pheromone trap you should spray fruit to protect
against hatch.
In 2000, 1st hatch occurred between April 30 to May 9 (was time to spray), 2nd hatch occurred from 3 to 20 June (1400 to 1700 DD) and hatch of 3rd (2300 DD) and later generations  continued from 7 July to late September.

Plum curculio - I recommend spraying after petal fall and repeat sprays at 10 day intervals thereafter until mid May. This will eliminate the overwintering populations of plum curculio, tarnished plant bugs, stink bugs and oriental fruit moths. Weevils emerge over a period of 400 degree days (base 50F, see below) and can cause fruit catfacing and worm damage up to 700 degree days from first emergence (as late as mid May). Inspect peach fruit for 1/8" diameter white spot of disturbed fuzz on peach or apples for cresent-shaped hole. Tease disturbed fuzz off peach or lift apple skin by wound and inspect with magnifying glass for presence of white PC egg or hole of PC larval tunnel. Summer adults emerged from 1100 DD on = 7 June to harvest.

Spray if you find PC damage or PC eggs or new tunneling.

Stink bugs began appearing peach orchards in mid April to mid May and again in early to mid June. They cause pin-prick size wound in April and May that enlarges into a catface type blemish as the fruit enlarges. On 4 June, we caught many brown stink bugs in our yellow pheromone trap (see yellow SB trap) but none had moved into the peach trees as yet and caused new oozing damage. Fruit fed on by stink bugs after late May (>1-1/2" diameter) tend to only exhibit a small hole with clear ooze. Be on look out for stink bugs or damage (clear string of ooze) from 4 June through harvest.

Codling Moth - 1st trap catch was 20 April, but that catch was low. Biofix was set as 27 April when treap catch was more  consistent. It takes 250 degree days (base 50F, see below) for hatch to occur. Limited hatch is predicted to occur as early as 5 May but most of hatch is expected between 11 to 26 May (250 DD = spray and 550 DD = 2nd spray, see below).
2nd generation hatch is predicted to occur by 22 June (1250 to 1700 DD) (spray for CM and repeat 10 days later to protect through mid July).
The 3rd generation will emerge between 2250 and 2600 DD or about 28 July (overlaps into 4th generation hatch at 3250 DD or about 23 August).

Grape Berry Moth- biofix is 5 May so 1st HATCH was occurred from 18 May to 6 June = 450 to 700 DD from biofix (time to spray).
Three summer generations emerge and attack berries throughout the vineyard after about:
- 1250 DD (about 25 June to 11 July),
- 2250 DD (about 28 July) and continue until end of 'Concord' harvest in early September (overlaps into 4th generation hatch).
How to Scout: By 9 May, begin weekly inspections for small larvae and webbed berries of 10 clusters on each of 30 vines (300 clusters) in perimeter row, especially those next to woods.
Control: From June through harvest, spray whole vineyard at 10 day intervals as long as you find live larvae in clusters.

San Jose Scale & Grape Scale are expected to produce crawlers by May 15. It is best to start inspecting limbs for crawlers starting May 7. Keep trees or vines protected as long as crawlers emerge in May. There is no good time to control scale after the May crawler emergence period. While dormant pruning, check for presence of scale on limbs or canes. Prune out infested limbs or canes, or thoroughly soak with 2 to 3% oil spray (92% unsulfonated, 70 viscosity) at bud swell (> 45 F with no chance of freeze in following two days).

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Degree-day Table    Click to see weather box

Date	OFM  (base 45F) Biofix 4/9	Plum Curculio  (base 50F) Biofix 4/3	Codling moth  (base 50F) Biofix 4/27	Grape Berry Moth  (base 50F) Biofix 5/5
4/09	0	122	-	-
4/18	124	211	-	-
4/20	145	222	-
4/27	215	268	0	-
5/03	347	397	117	0
5/08	449	474	194	40
5/10	504	518	238	301
5/17	661	648	366	428
5/24	806	750	470	533
5/29	905	824	544	607
6/03	1013	908	628	690
6/07	1138	1013	733	795
6/10	1232	1091	811	874
6/14	1365	1205	925	987
6/20	1544	1354	1074	1136
6/24	1649	1438	1158	1221
6/28	1764	1533	1253	1316
7/02	1890	1640	1360	1422
7/05	1986	1721	1441	1503
7/09	2141	1855	1575	1638
7/12	2258	1957	1677	1740
7/19	2484	2149	1869	1931
7/23	2652	2297	2017	2079
7/27	2802	2426	2146	2209
7/31	2955	2560	2280	2342
8/04	3102	2687	2407	2469
8/09	3287	2846	2566	2629
8/13	3423	2962	2682	2745
8/16	3520	3045	2765	2827
8/19	3616	3126	2846	2908
8/23	3766	3256	2976	3038
8/28	3939	3404	3124	3186
8/30	4007	3462	3182	3244
9/06	4243	3662	3382	3445
9/13	4383	3767	3487	3550
9/20	4548	3897	3617	3680
9/27	4673	3987	3707	3770

Red Numbers= need to spray against that pest

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Trap counts & Photo of: Codling Moth   Grape Berry moth         Oriental Fruit Moth