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Mole control, crabgrass prevention, and home fruit spray schedules
By John Fulton

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[March 17, 2016]  Mole Control - With spring come questions on mole control. The flooding experienced earlier this year made problems worse in some areas as moles left lower areas to inhabit your lawn. Mole control is best accomplished by trap or poison baits at this time of year.

There are three main types of traps including the jaw type, the plunger type, and the loop type. The plunger type is probably least effective, since it is hardest to get set to the proper depth. The folk remedy controls usually involve bubble gum or juicy fruit gum in the runs, but these don’t work consistently enough to recommend them. You’re better off chewing the gum yourself while you are setting the traps. There are also poison baits available that are effective. The soft baits, which are meant to imitate grubs or worms, are effective. Poison peanuts or milo are not effective, since moles don’t eat seeds.

Crabgrass Prevention



With the advanced development this spring because of temperatures above normal, it looks like now is the time to apply crabgrass preventative treatments. Normally the timing is about April 1, but forsythia looks like it is ready to bloom about two weeks early. Common pre-emergence chemicals include benefin, benefin plus trifluralin, dithiopyr, pendimethalin, and prodiamine. Due to the short-lived nature of the chemicals, a second application will be needed in about six to eight weeks. As a reminder, if you are seeding new grass, these applications for crabgrass are not an option. The chemicals can’t tell the difference between weed seeds and what you put out.

Home Fruit Spray Schedules

It seems like quality fruit must be sprayed at the recommended intervals. For apples and pears, we start with dormant oils, these need to be applied before buds swell. Dormant oils are usually needed only every two or three years to provide control of scales and mites. Sure, the populations will build up in the off years, but should remain relatively low if the three-year program is followed. Superior oils are lighter grade oils which won’t cause as much burn damage during late spring, or even in-season, use. Superior oils will also provide control of the mites and scales.

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The first regular spray of the year is applied when the green tissue is ½ inch out of the bud. This spray for homeowners usually consists of a multipurpose fruit spray (and sulfur if needed for powdery mildew). Multipurpose fruit spray has been re-formulated the last year or two to include malathion, captan, and carbaryl (methoxychlor was eliminated from the old mixture). This same mixture would be used when the fruit buds are in the pink stage (when fruit buds show color).  After that, the persistence and consistence pays off as you spray with the same mixture about every 10 days until we get to within two weeks of harvest. In our area, we need to continue spraying this late because of apple maggot and sooty blotch. 

This spray schedule will also control borers on apples and pears, if you also thoroughly spray the trunk and main limbs of the trees. On non-bearing, young fruit trees where borers have attacked, you can spray the trunks every two weeks during June and July with a multipurpose fruit spray.

The spray schedule for peaches, nectarines, apricots, and plums varies a little bit. The dormant spray for them uses captan fungicide. This is the only spray that controls leaf curl and plum pockets. The next spray is when fruit buds show color with captan, followed by captan at bloom. When the husks begin to pull away from the base of the fruit we would then spray with sulfur, captan, and malathion. This mix would then be used every 10 days or so to within a week of harvest.

For borers on the peach group, you can spray or paint the trunk only with carbaryl (Sevin) on June 15, July 15, and August 15. We walk a tightrope with the loss of some of the insecticides since carbaryl can cause fruit drop or thinning on the peach group and some apples.

[By JOHN FULTON, COUNTY EXTENSION DIRECTOR SERVING LOGAN, MENARD, AND SANGAMON COUNTIES]

 

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