INVESTIGATION ON THE EFFICACY OF ENTOMOPATHOGENLC NEMATODES AGAINST COLORADO POTATO BEETLE

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PARVIZI R.

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Journal: JOURNAL OF AGRICULTURAL KNOWLEDGE Year:2001 | Volume:11 | Issue:3 Page(s): 67-76

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Title

INVESTIGATION ON THE EFFICACY OF ENTOMOPATHOGENLC NEMATODES AGAINST COLORADO POTATO BEETLE

Author(s)

PARVIZI R. | Issue Writer Certificate

Keywords

ENTOMOPATHOGENIC NEMATODESQ4

COLORADO POTATO BEETLEQ4

BIOLOGICAL CONTROLQ3

Abstract

ENTOMOPATHOGENIC NEMATODES (Rhabditida: Heterorhabditidae and Seinemematidae) are obligate parasites of insects. These nematodes have a symbiotic association with bacteria of the genera (Photorhabdus for Heterorhabditis and Xenorhabdus for Steinemema). The infective 3rd-stage juvenile, the only free living stage, harbors the bacteria in its intestine. Upon encountering a susceptible host, the infective juvenile enters it through natural openings (mouth, anus or spirac1es) and penetrates into the insect homocoel where it releases the bacterium. The bacterium multiplies, killing the host within 48h. To evaluate the efficacy of ENTOMOPATHOGENIC NEMATODES as potential control agents against this insect pest, experiments were arranged in completely randomized design. In 1998-1999 Steinemema sp. and Heterorhabditis sp. were used at rates of, 0, 10, 20, 40, 80, 160 individualsper cm2 of soil. The experiments were conducted in 9x19cm pots containing a sandy-loamy soil mixture. Nematodes at the above mentioned rates suspended in 20cm3 distilled water were sprayed on to the surface of the soil in the pots. After releasing 20 last-instar larvae in each pot, the pots were covered with gauze. After 15 days imagines appeared in the pots, and their number were recorded .The results demonstrate that Steinemema sp. and Heterorhabditis sp. at the rate of 160 individuals per cm2 were able to parasitize 85.63% and 90% of the pest larvae, respectively. The differences were significant at P=1 %in comparison with 10 and 20 individuals/ cm2.

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APA: Copy

PARVIZI, R.. (2001). INVESTIGATION ON THE EFFICACY OF ENTOMOPATHOGENLC NEMATODES AGAINST COLORADO POTATO BEETLE. JOURNAL OF AGRICULTURAL KNOWLEDGE, 11(3), 67-76. SID. https://sid.ir/paper/28942/en

Vancouver: Copy

PARVIZI R.. INVESTIGATION ON THE EFFICACY OF ENTOMOPATHOGENLC NEMATODES AGAINST COLORADO POTATO BEETLE. JOURNAL OF AGRICULTURAL KNOWLEDGE[Internet]. 2001;11(3):67-76. Available from: https://sid.ir/paper/28942/en

IEEE: Copy

R. PARVIZI, “INVESTIGATION ON THE EFFICACY OF ENTOMOPATHOGENLC NEMATODES AGAINST COLORADO POTATO BEETLE,” JOURNAL OF AGRICULTURAL KNOWLEDGE, vol. 11, no. 3, pp. 67–76, 2001, [Online]. Available: https://sid.ir/paper/28942/en

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