scholarly journals Role of the larval parasitoid, Bracon hebetor (Say) (Hymenoptera: Braconidae) in the control of Cadra (Ephestia) cautella and Plodia interpunctella (Lepidoptera: Pyralidae) in Egypt

2013 ◽  
Vol 36 (3) ◽  
pp. 116-122
Author(s):  
Khalafalla Saber Ahmed
Keyword(s):  
Plodia Interpunctella ◽  
Ephestia Cautella ◽  
Larval Parasitoid ◽  
Bracon Hebetor ◽  
Lepidoptera Pyralidae

Laboratory studies on the role of an egg predator,Blattisocius tarsalis(Berlese) (Acari: Ascidae), in relation to the natural control ofEphestia Cautella(Walker) (Lepidoptera: Pyralidae) in Warehouses

1981 ◽  
Vol 71 (4) ◽  
pp. 557-574 ◽  
Author(s):  
C. P. Haines
Keyword(s):  
Adult Life ◽  
Effective Control ◽  
Ephestia Cautella ◽  
Pest Species ◽  
Natural Control ◽  
Adult Life Span ◽  
Rate Of Increase ◽  
Blattisocius Tarsalis ◽  
Lepidoptera Pyralidae

AbstractEffective control ofEphestia cautella(Wlk.) byBlattisocius tarsalis(Berl.) has occasionally been observed in warehouses. It has been postulated that this control is negated by fumigation under sheets, because of differential effects on the moth and its predator, and removal of alternative prey. The biology ofB. tarsaliswas studied at 27°C and 73% RH. On eggs ofE. cautella, development took 5·9 days and there was 7% mortality; on eggs ofTribolium oastaneum(Hbst.), development took 7·4 days and there was 48% mortality. When offered a choice of eggs of the two pest species, the mites very rarely preyed on those ofT. castaneum. The number ofE. cautellaeggs consumed (after correction for partial consumption) was 3·8 (total) by nymphs, 2·4/day by ovipositing females, 1·5/day by non-ovipositing females, and 0·8/day by males. The sex ratio (female: male) was 2·5:1. Adult life-span averaged about 55 days (maximum 153 days), and the oviposition period lasted about 20 days. Females laid up to 5 eggs/day at peak oviposition. The potential rate of increase ofB. tarsalisonE. cautellaeggs was very high, far exceeding that of its prey. These data confirm previous postulates concerning the role ofB. tarsalisin natural control ofE. cautella, and support the hypothesis that fumigation reduces predator-effectiveness. Modification of control regimes might allow greater natural control by the mite and reduce the increasing pest status of the moth.

scholarly journals Efficacy of the larval parasitoid, Bracon hebetor Say. (Hymenoptera: Braconidae) on the greater wax moth larvae, Galleria mellonella (L.) (Lepidoptera: Pyralidae) under laboratory and field conditions

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
D. Adly ◽  
W. M. Marzouk
Keyword(s):  
Galleria Mellonella ◽  
Larval Instar ◽  
Field Studies ◽  
Larval Parasitoid ◽  
Bracon Hebetor ◽  
Greater Wax Moth ◽  
Lepidoptera Pyralidae ◽  
The Mean ◽  
Wax Comb ◽  
Wax Moth

AbstractThe greater wax moth, Galleria mellonella Linnaeus (Lepidoptera: Pyralidae), is considered one of the most important pests effecting honeybee industry. The present study was carried out to evaluate the efficacy of the larval parasitoid, Bracon hebetor Say. (Hymenoptera: Braconidae), on G. mellonella in laboratory, honeybee colonies, and stored wax combs. In the laboratory studies, the pre-ovipositoinal, ovipositional, and post-ovipositional periods of the parasitoid were 0.27 ± 0.45, 20.87 ± 1.5, and 4.33 ± 0.48 days, respectively. The total number of eggs/female of the parasitoid on the 5th larval instar of G. mellonella reached 71.77 ± 7.84 eggs. B. hebetor females paralyze their hosts, the percentage of paralyzed 2nd larval instar of G. mellonella was 30% and parasitoid could not lay eggs on them, while the percentage of paralyzed 5th larval instar was 100% and parasitoid could lay eggs. In the field studies, the parasitoid, B. hebetor was released in honeybee colonies and stored wax combs to evaluate its efficacy. By releasing the parasitoid, the mean numbers of dead larvae of G. mellonella in treated honeybee colonies were greater than in the untreated, (91.8 ± 5.319 and 53.3 ± 24.373) larvae/colony, respectively. Also, releasing of B. hebetor against G. mellonella in stored wax combs reduced the number of survived G. mellonella larvae in treated storage wax combs to 3.2 ± 2.38 than in the untreated (using formic acid) 9.3 ± 5.52 larvae/store colonies. This is the first work to study efficacy of the parasitoid, B. hebetor on G. mellonella larvae in honeybee colonies and stored wax combs. The results suggested that the parasitoid had the efficacy to be used for controlling G. mellonella in beehives and stored wax comb in Egypt.

scholarly journals The Efficiency of the Parasitoids Bracon hebetor and B. brevicornis in the Control of Date Palm Moth Cadra cautella (Lepidoptera: Pyralidae)

2019 ◽  
Vol 32 ◽  
pp. 352-359
Author(s):  
Raja M. Khalaf ◽  
Ayad A. Abdulkader
Keyword(s):  
Native Species ◽  
Crop Improvement ◽  
New Combination ◽  
Ephestia Cautella ◽  
Small Scale ◽  
Pest Species ◽  
New Host ◽  
Bracon Hebetor ◽  
Lepidoptera Pyralidae

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