![]() ![]() Some local estimates predict that Montmorency harvesting will start before the July 4 for the southwest region. Cover sprays for peach scab run from petal fall to third cover and from shuck split to pit hardening for rusty spot (powdery mildew) for susceptible varieties.Ĭherry Montmorency fruit are generally red with fruit sizing being inhibited by dry conditions. White circular patches of rusty spot are very conspicuous on fruit of some varieties with some trees having more than 50% of the fruit affected. Flight of the second generation of oriental fruit moth should be starting soon. Protection of trunks and limbs against borers is needed now. Peach and nectarine fruit are sizing rapidly with hand thinning underway. ![]() Protection against larvae is recommended approximately 350-450 DD base 42 F from this biofix date, or approximately June 25 for central Berrien County. Trap catches of oblique banded leaf roller at the Trevor Nichols Research Center jumped last week, giving a biofix of 6/12. Discolored foliage and restricted terminal growth due to water shortage is common on sandy sites. Rain last Tuesday of less than an inch helped somewhat, but irrigation is needed for many orchards. The lows will also be warm with temperatures to stay in the low to mid 60s F. Temperatures should stay in the mid to upper 80s F for much of the week with a small drop of a couple degrees over the weekend. There are some chances of afternoon showers beginning Friday and continuing through the weekend but not much accumulation is expected. Southwest Michigan GDD summary from March 1 – June 19, 2023ĭry conditions should continue. With the cool weather, we collected fewer than average number of degree days last week, 140 GDD base42 and 83 GDD base50, respectively. If this drought continues, expect small fruit and/or additional fruit drop. For larger trees with deeper roots, stress is less visible but nutrient uptake by the roots near the surface is still compromised. In these conditions, small and young fruit crops are seeing stress and leaves are wilting. Soils moisture levels are at the wilting point at both the 8-inch and 16-inch depths in most soils. The US Drought Monitor is indicating that the entire southwest Michigan region is in a moderate drought condition. This was enough to wet the top few inches of soil, but not enough to break the drought. Total amounts were generally a quarter to three quarters of an inch of rain but a couple locations are reporting around an inch. The low temperatures also increased by 10 degrees to near 60 degrees.Ī cool front passed through the region on Tuesday bringing steady rain for much of the day. Temperatures began rising over the weekend to the mid 80s F for the start of this week. High temperatures were in the 60s degrees Fahrenheit to lower 70s F for much of the week. ![]()
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