Recognizing the Good Bugs in Cotton - Texas Is Cotton Country ...

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Spined Assassin Bugs Sinea diadema Characteristics: Spined assassin bugs are slow moving, medium to large bugs (1/2 to 3/4 inch long) with a long, curved beak held beneath the body. The front legs are enlarged and spined for grasping prey, and spines are also present on the thorax. Color varies from black to reddish-brown. The head is narrow and antennae and legs are long and slender. Nymphs resemble adults but lack wings. When disturbed, these bugs will often arch back, pulling their forelegs up and back in a defensive posture. The spined assassin bug, Sinea diadema, is found throughout the Cotton Belt. Other species of Sinea that may be found in cotton include S. confusa, S. complexa and S. spinipes. Prey: Assassin bug nymphs and adults eat a variety of prey including caterpillars, aphids and many other insects, such as lady beetle adults and spiders. General Biology: Eggs resemble those of the leafhopper assassin bug — they are barrelshaped and laid upright in tight clusters or in rows on leaves or stems. However, the top or cap of the egg may be shaped in bizarre shapes or ornamentations, unlike that of the leafhopper assassin bug. Eggs hatch in about 14 days, and nymphs require 25-35 days to complete development. Adults live 1-2 months and females lay up to 300 eggs. These 62
predators typically sit and wait to attack passing prey. Spined assassin bug, Sinea diadema W. Sterling 63
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E-357 7-05 Field Guide to Predators
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CONTENTS Introduction 3 Acknowledgm
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Introduction The role of natural en
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mologists identify and appreciate t
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ed in this book. We have only focus
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a messy task, caterpillars can be p
Page 13 and 14: thrips. It is a serious pest of see
Page 15 and 16: cloth, spread the cloth between two
Page 17 and 18: FURTHER READING The following publi
Page 19 and 20: ugs (E,L), Leafhopper assassin bug
Page 21 and 22: European Corn Macrocentrus grandii
Page 23 and 24: ecolonization by natural enemies on
Page 25 and 26: important. Chemical Class Cotton In
Page 27 and 28: erations per year. The green lynx p
Page 29 and 30: Celer crab spider W. Sterling 27
Page 31 and 32: Black and white jumping spider W. S
Page 33 and 34: Green lacewing egg W. Sterling J.K.
Page 35 and 36: Pupa of the green lacewing Adult gr
Page 37 and 38: Photo: A93. Brown lacewing adult Un
Page 39 and 40: W. Sterling Adult ground beetle Adu
Page 41 and 42: Larva of a ground beetle W. Sterlin
Page 43 and 44: year. Small groups of adult beetles
Page 45 and 46: Adult harmonia or Asian lady beetle
Page 47 and 48: Adult convergent lady beetle Conver
Page 49 and 50: Lady beetle eggs Pink spotted lady
Page 51 and 52: Collops balteatus W. Sterling 49
Page 53 and 54: Adult hooded beetle D. Waters, Univ
Page 55 and 56: M. Badgley Adult earwig tending egg
Page 57 and 58: Adult rove beetle (note short wing
Page 59 and 60: Damsel bug adult and nymph J.K. Cla
Page 61 and 62: Eggs of the spined soldier bug W. S
Page 63: Nymph of the spined soldier bug Adu
Page 67 and 68: Egg mass of Zelus renardii Leafhopp
Page 69 and 70: Adult bigeyed bug, Geocoris punctip
Page 71 and 72: ground debris. The winter is spent
Page 73 and 74: Long-legged fly J. Ruberson 71
Page 75 and 76: days. Nymphs become adults in 12-20
Page 77 and 78: Eggs of Scymnus on leaf Larva of a
Page 79 and 80: Adult Stethorus lady beetle J.K. Cl
Page 81 and 82: General Biology: Imported fire ants
Page 83 and 84: Adult sixspotted thrips M. Badgley
Page 85 and 86: Predatory mite feeding on two-spott
Page 87 and 88: Adult Archytas marmoratus H. Gross
Page 89 and 90: 10 days later and live for several
Page 91 and 92: Adult Macrocentrus grandii M. Scott
Page 93 and 94: and the wasps overwinter in the soi
Page 95 and 96: worm larva and spins a cocoon in th
Page 97 and 98: Adult Chelonus stinging (parasitizi
Page 99 and 100: about 3 weeks and produce about 160
Page 101 and 102: Hyposoter cocoon near remains of pa
Page 103 and 104: Adult Cotesia marginiventris parasi
Page 105 and 106: studies have shown releasing labora
Page 107 and 108: Adult Meteorus parasite J. Ruberson
Page 109 and 110: L. testaceipes adult J.K. Clark, Un
Page 111 and 112: A looper filled with hundreds of Co
Page 113 and 114: Adult Trissolcus basalis parasitizi
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shaped slit in the pupal skin. Nymp
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Anaphes iole, a parasite of lygus b
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Trichogramma wasp mounted on micros
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Bollworm egg parasitized by Trichog
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in cotton fields during epizootics.
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Bollworm killed by NPV W. Sterling
Page 127 and 128:
Caterpillar killed by Beauveria fun
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NOTES 127
Page 131 and 132:
NOTES 129
Page 133 and 134:
NOTES 131
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Sources of entomological supplies A
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