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(BASIC) D–Vac Sample Report: July 26 & 27


D–Vac Sample Report: July 26 & 27

Kern County BASIC Pilot Program

Deke and Francisco Cornejo made and compiled the report.


D–Vac Vacuum Insect Samples

A combined report for all five growers’ cotton blocks

This is a list of insects that we have encountered during July. It represents only a few of the one thousand or more that have been found in alfalfa hay and cotton in past research in this farming area. They are rated according to the significance of their possible damage thresholds (not just according to numbers). The codes are defined as follows:

0 = none,

L = low presence, a few

M = more than 5, up to common

H = 10 or 20,, a lot in case of aphids, mites and whitefly, according to possible damage thresholds

Aphids: 0 to H

Corn aphids – H (in spots) Immigrating from corn harvesting

Cotton Aphid L

Ladybugs: Immature: H; adults: M

Syrphids: L immature and adults.

Predatory midges – L adults.

Whitefly – L

Green lacewings H – adults; immature – L

Hyperaspis ladybugs

Encarsia 0

Eretmoscerus 0 Releases of insectary sources of these work animals are being made.

Predatory bugs: Minute pirate bug, Big–eyed bug, Damsel bug, Assassin bug, Stilt legged bug.

(The immature stages of all insects are tiny and seek stationary small food like the immature scale or whitefly fastened to underside of the leaves).

NOTE: Nature has ways to prevent most pest eggs and immature offspring from reaching adult reproductive stages. This unseen predation is often not accounted. It has the effect of suppressing pests on which they forage for their survival when they can’t find the prey that is most suitable. Pesticides unwisely prevent this.

Lygus – O immatures L adults

Big–seyed bugs H adults and immatures

Egg parasite – Telenomus sp. on eggs of

Damsel bugs – L immature and adults

Mymarid egg parasite of lygus

Predatory Mirids (red and black)

Crab spiders and other spiders web weavers, wolf spiders, jumping spiders, dwarf etc.

Big–eyed fly – Pipunculus sp.

Says stink bugs mostly adults, few egg masses and nymphs. L and declining populations

Collops beetles.


Trissolcus Scelionidae (parasite of eggs)

Tachind fly–Gmnosoma (attacks adults).


Leaf worm Cabbage looper – M Nearly all are small (less ½ inch) shows they are being eaten before they can grow larger.

Predatory bugs ie. Minute pirate bugs, Big–eyed bug, damsel bugs, Assassin bugs, Stilt legged bugs, Preatory preying mantids

Apanteles wasp Braconidae – attacks worms

Hyposoter wasp Ichneumonidae attacks worms

Copidosoma – egg larval parasite

Trichogramma – egg parasite

Voria ruralis – attacks large worms

Pimpla sp. IchneumonidM

Beet armyworm – L

Apanteles – small worms

Chelonis – egg–larval parasite

Campoletes – (Ichnemonid) attacks small larva

Hyposoter (Ichnemonid) attacks half inch worms

Meteorus – Braconidae

Therion – (Ichnemonid) attacks large worms

Archaetoneura – Tachinid fly, attacks medium to large worms

Eucelatoria Tachinid fly attacks medium to large worms

Predatory bugs listed above.

Bollworms 0 to L Moths are highly attracted to corn (corn earworm) less so to cotton bolls &squares

Minute pirate bug

Hyposoter Ichneumonid wasp

Eucelatoria Tachinid fly


Mites 0 to L

Minute pirate bug

Predatory midges

Green lacewings

Six–spotted thrips

Black hunter thrips

Western flower thrips

Mite destroying ladybug Stethorus sp.

Oligota – Staphlinidae

Predatory mites

Western flower thrips

Black Hunter thrips

Notoxis – Hooded beetles Anthicidae

Western Fire Ant

L to M (seen nesting sites along drive roads). (May affect bio control by destroying beneficial insects while harvesting pollen and honey–dew for whitefly and aphids).

Miscellaneous beneficial insects with unknown prey preferences seen in samples:

Chloropid flies

Fruit flies

Lathrididae beetles possibly fungus feeders.

Psocids Book lice, feed on dead insects & sooty mold from whitefly and aphid honeydew sources.

Parasites of leaf miners Liriomyza sp. and other parasitic wasps and flies whose hosts are still unkown to us.

Plant feeding insect that are present, feed on weeds etc. but are fed upon by general predators

Potato leafhopper, Empoasca sp.

Clover leafhopper, Aceratogalia sp.

Leaf miners Liriomyza sp.('Diptera)

Other aphids, grain aphids, alfalfa aphids, aphids on weed species

Flower visiting Staphlinid beetles

Chalcids – Wasps known to be parasites or predators of beneficial insects, so–called hyper–parasites.

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