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Efficacy of some bioinsecticides against Bruchidius incarnatus [Boh.] [Coleoptera: Bruchidae] infestation during storage

100%
Sabbour M. M., E-Abd-El-Aziz S.
Journal of Plant Protection Research
|
2010
|
tom 50
|
nr 1
28-34
Potential activities of three essential oils (cumin, clove and mustard) and of microbial agents (Paecilomyces fumosoroseus, Nomuraea rileyi, Lecanicillium (Verticillium) lecanii and their combinations against Bruchidius incarnatus (Boh.) were evaluated. In choice test, mustard and clove oils revealed a strong repellent activity after 7 days (89% and 71%, respectively) against B. incarnatus beetles. Cumin oil showed the lowest repellency (47%). Accumulative mortality of beetles increased gradually with the increase of exposure intervals. Mustard oil treatment gave the highest mortality percentage of 76% after 168 h from treatment followed by clove treatment which amounted to 63% and the lowest percentage of 42.8% was recorded in case of cumin oil. Mustard oil was the most effective in enhancing the potency of P. fumosoroseus and N. rileyi and decreased LC50 of the target insect (100 and 102×107, respectively). The persistent effect of formulated mustard oil with either P. fumosoroseus or N. rileyi fungi on foam covering gunny bags displayed several different modes of action, by reducing oviposition and adult emergence (F1) of B. incarnatus. The oviposition was completely inhibited when stored broad bean seeds were treated with mustard oil + P. fumosoroseus during 20, 40 and 60 days of storage. Application of mustard oil combined with P. fumosoroseus on foam covering gunny bags provided promising oviposition deterrency, toxicity and suppressing B. incarnatus infestation, persistence and protecting broad bean seeds from beetles' infestation for 120 days during storage.
2
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Differential Efficacies of Nomuraea Rileyi and Isaria Fumosorosea on Some Serious Pests and the Pests’ Efficient Predator Prevailing in Tomato Fields in Egypt

100%
Matter M. M., Sabbour M. M.
Journal of Plant Protection Research
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2013
|
tom 53
|
nr 2
The efficiency of the two microbial control agents Nomuraea rileyi and Isaria fumosorosea, were evaluated against Bemisia tabaci and Myzus persicae pests in tomato cultivations The safety levels of the agents, to the predator Coccinella undecimpunctata, were also studied under laboratory and field conditions. Results showed that under laboratory conditions, LC50 values for N. rileyi and I. fumosorosea were 103.7x104 and 139.4x104 spores/ml against B. tabaci, respectively, while the corresponding values for M. persicae were 89.1x104 and 149.8x104 spores/ml, respectively. Under the field conditions, the percentages of infested plants with B. tabaci and M. persicae were significantly decreased after treatments with both fungi as compared with the corresponding controls. At the El-Esraa farm (Nobaria region), the weights of the tomato yield were 2,417 and 2,911 kg/feddan when I. fumosorosea and N. rileyi were applied respectively, as compared with 2,010 kg/feddan in the corresponding controls. The corresponding yields in El-Kassaseen were 2,699 and 2,999 kg/feddan, respectively, as compared to 1,990 kg/feddan in the control. The present study showed that C. undecimpunctata exhibit relatively high and reasonable resistance to N. rileyi and I. fumosorosea at the highest lethal concentration (1x108 spores/ml) for both tested preys.
3
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Efficacy of three entomopathogenic fungi alone or in combination with diatomaceous earth modifications for the control of three pyralid moths in stored grains

80%
Sabbour M. M., El-Sayed Abt-El-Aziz S., Adel Sherief M.
Journal of Plant Protection Research
|
2012
|
tom 52
|
nr 3
The efficacy of Natural diatomaceous (DE) alone and combined with three fungal pathogens: Beauveria bassiana, Metarhizium anisopliae and Isaria fumosorosea against three moth species, Plodia interpunctella, Ephestia cautella and E. kuehniella was evaluated. Modified diatoms with Calcium hydroxide (Ca-DE) and modified diatoms with Sodium hydroxide (Na-DE) were the highlight treatments against tested insects and achieved the highest mortality percentages. E. kuehniella achieved the highest tolerant to tested DEs. B. bassiana was the most effective fungus alone against the three tested insects. Ca-DE and Na-DE treatments strongly enhanced the potency of the tested fungi. E. kuehniella was more susceptible to M. anisopliae and B. bassiana. Larvae of P. interpunctella and E. cautella were more tolerant to I. fumosorosea alone than E. kuehniella. In most cases, DE combinations with tested fungi had synergistic effects, while in E. cautella, modified diatoms with Aluminium hydroxide (Al-DE) decreased the efficacy of M. anisopliae and I. fumosorosea. Also, Al-DE and DE impaired the efficacy of I. fumosorosea against E. kuehniella. The egg production was highly suppressed by combination of Ca-DE followed by Na-DE with tested fungi in comparison to untreated control. The combination of Ca-DE/Beauveria bassiana strongly suppressed the number of deposited eggs of P. interpunctella (54.6±5.8 eggs/female), in comparison to untreated control (288.3±3.4 eggs/female). The most effective DEs modification were Ca-DE and Na-DE had insecticidal, repellent and ovicidal effects against tested insects and they had synergistic effects on the potency of tested fungi.
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