Catalog of Beneficials


Mealybug, Scale, and Whitefly Control

Overview on Mealybug Controls

    Cryptolaemus montrouzieri

    Leptomastix dactylopii

Overview on Scale Biocontrol

    Aphytis melinus

    Lindorus lopanthae

      (also known as Rhyzobius lopanthae)

Overview on Whitefly Biocontrols

   Delphastus catalinae

   Encarsia formosa

   Eretmocerus californicus

Also see Lacewing a general predator.

For Bulletins on how to use each of these insects in a biocontrol program see Bulletins.


Mealybug Biocontrols - Several releases of Cryptolaemus or green lacewing may be needed especially in winter. "Crypts" are suggested for high levels and in warm, humid conditions and lacewing for more varied conditions. Where "Crypts" are attracted away from plants to skylights and windows, lacewing are better. Lindorus eat mealybug, but need scale to reproduce.

At different optimum temperatures Leptomastix complements use of predators against different host stages of citrus mealybug only. Reduce high levels of mealybug with predators followed by wasps or begin biocontrol with Beauveria (Naturalis) or Neem oil before releasing biocontrol agents. Hb nematodes attack root mealybug in soil. Remove ant interference if present.


Cryptolaemus montrouzieri


Mealybug Destroyer

predatory beetle

prefers 60-90 F, 70-80% RH


mealybug, scale, aphid, adult & larvae both feed on all stages of mealybug, larva looks like a giant mealybug,

do not refrigerate, hold at room temp. or 50 F


2-5/sq yd


1-2 X, inoc

CR25 25/tube 23.00
CR50 50/tube 31.00
CR100 100/tube 53.00
5+ tube 45.00
CR250 250/tube 92.00
4+ tubes 84.00
10+ tubes 82.00
CR500 500/tubes 170.00
5+tubes 163.00
10+tubes 75.00
20+tubes 50.00
Schedule of 8 shipments

8 shipments




4+ tubes




SCALE BIOCONTROLS – Lindorus lopanthae and green lacewing favor soft scale if not too sticky. Cybocephalus is more specialized for certain scale. Cryptolaemus eat scale, but need mealybug to lay eggs. Aphytis melinus attacks certain armored scale, but may not attack all species in a family. Use of appropriate species in sufficient numbers in regular releases can suppress or control infestations in two to three months. Then, one to three releases per year should maintain control. Hot Pepper Wax sprays may help clean up some scale problems.

Aphytis melinus

Golden Chalcid

parasitic wasp

parsitizes 2nd, 3rd instar female, 2nd, pre pupal male, host feeds other stages

Armored scale, California red, citrus red, oleander, San Jose, ivy, walnut, Dytyospermum, and citrus yellow scale 5K-10K/acre

1-2/sq ft GH


1 wk I, 3 X

AP5 5,000/cup 18.00
AP10 10,000/cup 29.00
5+ cups 24.00
10+ cups 20.00
AP30 30,000/cup 68.00
5+ cups 58.00
10+ cups 54.50

Cybocephalus nipponicus

predatory beetle

Euonymus scale, San Jose scale colony CYBO100 100/bottle 91.00
5+ bottles 83.00
10+ bottles 80.00
Lindorus lopanthae

( also known as Rhyzobius lopanthae)

Scale Destroyer

predatory beetle

hard scale

soft scale until honey-

dew forms, will eat some mealybug, other small insects,

prefers 60-77 F, 20-90% RH

larvae, adult both predators



1-2 K/acre

3 wk I, 2 X

3-6/10 sq ft GH

LIN50 50/vial 39.00
5+ vials 25.00
10+ vials 22.00
LIN100 100/vial 56.00
5+ vials 43.00
10+ vials 40.00
LIN250 250/vial 99.00
5+ vials 88.00
10+ vials 84.00


Whitefly Biocontrols General predators used most are Delphastus and green lacewing. Delphastus is introduced early in hot spots. Inoculative releases take 3 weeks to turn a generation that yields 100 times more beetles. Unlike lacewing, Delphastus don’t eat parasitized whitefly. Lacewing are more affordable in inundative numbers in regular releases or to maintain control of other pests besides whitefly. Encarsia formosa does best against Greenhouse whitefly (GHWF), Trialeurodes vaporariorum and will attack Bemesia (silverleaf or sweet potato whitefly).

Eretmocerus does best against Bemesia, woolly, citrus and bayberry whitefly, and will parasitize GHWF. GHWF adults are white, wings together parallel to leaf surface. Bemesia adults are yellow, wings slightly apart showing abdomen and at an angle to leaf surface. A fringe rings the edge of white GHWF nymphs and no eye spots are visible; Bemesia nymphs are yellow with no fringe, but eye spots are visible. GHWF lays eggs in circular patterns while Bemesia lays its eggs singly. High populations may need to be reduced with Beauveria (Naturalis), soap (Dr. Bronner’s), neem, or Hot Pepper Wax before introducing biocontrols.

Delphastus catalinae

(=D. pusillus)

Whitefly Predator

predatory beetle

no diapause active >54 F (12 C)

whitefly - for high WF density

1-2/100 sq ft

1 X inoc

DE100 100/bottle 53.00
5+bottles 37.00
10+ bottles 33.00
DE1000 1,000/bottle 160.00
5+bottles 144.00
10+bottles 140.00
20+bottles 139.00
Encarsia formosa

Greenhouse Whitefly (GHWF) Parasite

parasitic wasp

strip = 10 units of 100 parasitized scale glued on perforated cards with hooks

yields 1K parasitic wasps

no diapause, inactive < 54 F (12 C)

loose parasitized scale in increments of 1,000, better distribution than with strips

Greenhouse whitefly (WF), attacks 2nd instar

proactive 8 to 10 weeks covers susceptible stage

silverleaf WF less preferred host

low pest density only

1-5/10 sq ft

1 wk I, 4-6 X

2-4/ sq ft GH

8/ tom.plant

drawing CA-DPR

EN1 1 strip 18.00
5+ strips 15.00
10+ strips 12.50
20+strips 11.00
40+strips 10.00
loose scale in bulk minimum 5,000 or 1 ml ENBULK 5K+ (1 ml) 17.00/K
10K+ (2 ml) 13.00/K
20K+ (3 ml) 9.75/K
40K+ (4 ml) 9.00/K
8 shipments
5K+ 15.98/K
10K+ 12.09/K
20K+ 9.07/K
40K+ 8.37/K
Eretmocerus californicus

(=E. eremicus)

Bemesia Parasite,

parasitic wasp

Eretmocerus (ER) cards

16 separate blister-pack cards each with 500 parasitized scale

yields 8K parasitic wasps


silverleaf, sweet potato whitefly (Bemesia), woolly, citrus, bayberry, lesser extent greenhouse whitefly

for low pest density

use proactively for 4 to 10 weeks--covers susceptible larval stage


5-20/10 ft2 




ER3 3,000/bottle 58.00
5+ bottles 46.00
10+ bottles 43.00
ER3 X4

4 shipments

3,000/bottle 56.26
5+ bottles 44.62
ER15 15,000/bottle 231.00
5+ bottles 209.00

ER15 X4

four shipments

10,000/bottle 224.07
5+ bottles 202.73



5,000/set of 10 88.00
5+ sets 76.00


5K/set of 10 - 4 shipments

1 set 85.35
5+ sets 73.75


Eretmocerus eremicus & Encarsia formosa together on cards, 250 mix/card, 40 cards, 10,000 total

for mixed greenhouse and sweet potato

whitefly 2nd to 4th instar larvae

  ENERCD 10,000set 40cd 124.00
5+ sets 112.00
15+ sets 108.00

Aphid Biocontrol

Mealybug, Scale and Whitefly Biocontrol

Mite and Thrips Biocontrol

Caterpillar (Moth) Biocontrol

Fly Control

Leafminer and etc Biocontrol