Info this week 36

The end of season is approaching, so predators are more seldom. Therefore some other pictures that might be interesting.

The one i love the most is the young lacewing larva, eating its way through a colony of spider mites. They were really doing a good job there.

The effect of an wetting agent is also good to sea.

And the the differences in the air in the substrate. In this case the coir with lots of air and the peat with only a little air.

The leaf wasp is a very active insect. The larva can cause lots of damage and are very hard to control. They look like a caterpillar, but don’t react on the same treatments unfortunately.

lacewing-larva

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Bugs this week (30)

Yes, not only bugs. But a little more. I also smuggled a little mildew statistics in, and a little weed-climate issue.

Mildew statistics: Important to know about the scaling: 0 = no mildew; 3 just not acceptable; 5 = full with mildew. Two things are quite interesting i think:
– The total level of mildew is very acceptable, although growers hardly spray
– The everbearers don’t have mildew (or on a really low level). Although these growers dont spray.

Weeds below the table tops.
No, it doesn’t look that clean, but it has quite some advantages:
– Much better / stable climate. Especially in last weeks hot climate.
– Much more predators.

Flowers. Several flowers are attractive for Trips and or Orius. The differences between the flowers are quite huge. My son is doing a research right now after the differences between some of them. Good to see.

Feltiella

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Feltiella feeling good

Bugs this week 26 / graphs

This week some more pictures and some graphs of the current situation in the Norther part of the Netherlands.

Overpressure
Among the pictures you see one picture with black flower buds: Overpressure due to a combination of very active roots (good condition, high temperatures + no evaporation (high humidity). In this case pressure causses tissue damages on the weak tissue in the plants (generally: flower buds, young leafs and very young runners).

Below the development of the aphid population this year. The level is the following: 0 = nothing 1 = every now and then an aphid 3 = limit of acceptable 5 = totally full with aphids

Milldew development can be seen in the graphs below. It is very clearly, that the coincidence of milldew is increasing. Althoug the highest level is still on 2 (acceptable), but action is needed.

Those graphs is one of the things i like in my scouting app (FarmQA).

Below this weeks bugs.

Overpressure

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Bugs this week 22-25

Some interesting bugs at work in strawberries. Especially from the hoverfly and aphidoletes i have seen amazing activities.

Important in all this is that you have the good climate / settings: direct around the crop (grass, clover, flowers) and not far away some flower zones with flowers attracting predators.

Egg hoverfly

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Covercrops – Flower borders

Fruit Growers Tasmania is an organisation for the support of their member growers in the total range of growing and marketing fruit. I admire the way they assist their growers in almost everything a grower might face (contacts with government about corona, labor; export regulation; growth technical information etc). Fruit Growers Tasmania yearly organizes conferences about the crops they support. This year i could do a presentation about covercrops and flower borders in strawberries.

Withgoing the presentation and pictures used for a presentation about covercrops below table tops / gutters outside, in rain coats (open tunnes) and greenhouses and flower borders in order to attract predators close to strawberries.

Link to the presentation: covercrops flower borders

Aphids + predated on grass below table top

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Grass – Straw – Berries

Grass / Clover or another cover crop can be a huge camechanger. I see more and more growers changing from an artificial soil cover to a cover crop. Main reasons are:
– much better climate:
– in hot summers it can be till 6 oC cooler with an active cover crop
– higher humidity or better a humidity buffer – causing less problems with mildew

  • Much better climate:
    • In hot summers it can be till 6oC cooler with an active cover crop
    • Higher humidity or better: a humidity buffer with smaller differences between higher and lower humidities. Causing significant less problems with mildew
  • Hiding place / buffer for predators. I normally see more and more predators like:
    • predatory mites
    • aphidius and aphidoletes – sometimes together with some aphids
    • hover flies
    • and sometimes lacewings

grass

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Bugs this week 16 – Aphidoletes

Aphidoletes.
A very small fly, but capable of quite some cleaning work in Strawberries. Below you see some pictures of:
– eggs (orange-red color)
– larvea:
– 1 with an eaten Ahpid
– 1 just starting to eat an aphid
Last year we had some problems. Predatory mites against white fly and thrips eating the eggs of the Aphidoletes, thus a growing Aphid population.

20220421_095830

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Eastern – Pascha – Future

For me eastern – pascha is the most meaningful celebration i know. It is about our future. For some the step out of a past in slavery, for all a view into a future without all current troubles. just like a flowering strawberry stands for a future beautiful, nice tasteful strawberry.
– Like the small chicks stand for future chickens and maybe new eggs
– Like the lambs stand proof the future sheeps, with wool, meat and milk

So is Eastern / Pascha the proof of the new life to come.
We have a future.
A future much greater and more beautiful as the current.
And in this future:
– no death
– no diseases
– no pain
– no war
Boring? I don’t think so. We will once find out what we will do. Happy for sure. But i do hope that there on the new earth we may grow Strawberries as well. And we may offer God of these our beautiful and delicious fruits.

Blessed resurrection celebration for all of you.

Bugs this week 22 12: Predator population after 4 years without spraying.

One of the growers i visit in Northern Germany has builded 3 greenhouses for about 4 years ago. She and her husband decided they don’t want to expose themselves nor their workers to chemicals. So that means no spraying at all.

Therefore they use predators, they seeded a mix of grass and clover under the table tops. And yes, it functions very nice. No problems with pests, a better climate (moisture buffer), so hardly problems with mildew. Therefore they also use modern varieties, that can handle mildew and several other diseases that may be an issue in strawberries.

And yes, about 4 weeks after planting the first aphids on the grass the table tops. Very few aphids on strawberry plants. But, also predators: predated aphids by Aphidius, Lacewing, Ladybug and Aphidoletes.

Very interesting to see how a population of predators builds up by just stopping to spray.