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Host Selection Behaviour of Microplitis Pallidipes Szépligeti and Its Mechanism

Author: BaoYangBin
Tutor: YangYiZhong；JiangJieXian
School: Yangzhou University
Course: Agricultural Entomology and Pest Control
Keywords: Short foot side Microplitis Host Selection Spodoptera litura nuclear polyhedrosis virus Spodoptera litura Beet armyworm Looking behavior Spawning behavior Phenoloxidase activity Melanin
CLC: S476.3
Type: Master's thesis
Year: 2009
Downloads: 87
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Abstract

In this thesis, a short foot side Microplitis of Microplitis pallidipes Szepligeti Spodoptera litura and Spodoptera exigua selection and identification of health and a sense of poison Spodoptera litura behavior, and also study the impact of learning behavior and choice behavior, and initially explored the short foot side Microplitis identify poison of health and a sense of the biochemical mechanism of host. The results are as follows: a light foot side Microplitis choice behavior of immature stages of Spodoptera litura and Spodoptera exigua experience short foot side ditch the Braconidae Find and parasitic vegetable armyworm larvae have a certain impact and selection favors the bee The preferred attack Breeding host of breeding host attack time is also shorter. Were higher than the number of attacks of the beet armyworm Spodoptera exigua, and with a significant difference, and is not young, experienced. Into a bee's learning experience significantly enhanced short foot side ditch cocoon bee's search ability into a bee different learning experience makes parasitoid different host select priority choose to learn through the host, learning through the foraging time and attack time. less parasitic higher rate. 2 short enough side Microplitis toxic host of health and a sense of choice behavior short foot side Microplitis toxic host of health and a sense of the ability to identify virus concentration of 1.68 × 108PIBs/ml short foot side Microplitis bee from a sense of poison after three days prefer parasitic healthy host larvae. Cover cage trials also showed short foot side Microplitis sense poison after three days began to choose healthy host. Virus concentration of 1.68 × 107 PIBs / ml Eau foot side Microplitis after feeding poison four days tend to choose a healthy host, the virus concentration is 3.36 × 106 PIBs / ml, short foot side Microplitis a certain preference for the choice, but the difference was not significant. Parasitic drug host of health and a sense of the rate of change with the change in the number of attacks, parasitic rate of decline may be due to the development of the host. 1 day and after feeding poison short foot side Microplitis virus concentration of 1.68 × 107 PIBs / ml in virus concentration of 3.36 × 106 PIBs / ml 1-2 days after feeding poison poison host preference choose a sense, in virus concentration 1.68 × 108PIBs/ml such a phenomenon, he was not. Young, experienced certain short foot side Microplitis host selection, to sense toxic host for breeding hosts short foot side Microplitis reduced both the search time host of the flu drug. Judging from the number of attacks on the the flu drug host the number of attacks has reduced the preferred attack flu drug host. Studies have shown that short foot side Microplitis immature stage of development experience with memory, but has little effect on their final choice affects only its first search and identification, healthy host will be the right choice after several spying and evade flu drug host. Into bee learning experience had a greater impact on their host selection behavior. The side of the egg production in healthy hosts Microplitis obviously tend to choose healthy host. With a sense of poison host, the short foot side Microplitis healthy host search time was significantly shorter, a significant increase in the number of attacks, parasitic rate was increased. The short foot side Microplitis number of attacks on healthy host larvae is always greater than the number of attacks on flu drug host larvae. The short enough side Microplitis chemotactic response of host larvae infestation leaves pale foot side Microplitis not identify host larvae 1-4 days after feeding poison parasites, feeding poison after 5 days tend to choose healthy host For leaves - larvae complex, four days after feeding poison began to choose healthy host. The side ditch Braconidae unable the frass identify health and sense of poison Twill armyworm larvae. Can not distinguish between no spraying virus suspension leaves. 4 nuclear polyhedrosis virus infected Spodoptera litura larvae melanin and phenol oxidase activity with increasing feeding poison after time, the virus in the larvae of Spodoptera litura continue proliferation, hemolymph melanization percentage into a downward trend, 4 days after feeding poison the flu drug Spodoptera litura hemolymph black percentage compared with healthy larvae reached a very significant level. In the sense of poison after 1-3 days, the larvae phenoloxidase activity rising, began to decline rapidly in the first 3 days, the final phenoloxidase activity below the healthy host body.

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