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Method for optimizing population structure of Aenasius bambawalei through host conversion mode

A technology of Leaperia bancrofti and conversion method, which is applied in the field of optimizing the population structure of Leaperia bancroft through host conversion, can solve problems such as parasitic characteristics and unclear influence on population structure, and increase the parasitization rate of mealybugs, The effect of increasing the parasitism rate and prolonging the lifespan of male and female bees

Active Publication Date: 2021-11-23
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impact of the host switch on the parasitic characteristics and population structure of Leaperia bancrofti is not yet clear.

Method used

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  • Method for optimizing population structure of Aenasius bambawalei through host conversion mode
  • Method for optimizing population structure of Aenasius bambawalei through host conversion mode
  • Method for optimizing population structure of Aenasius bambawalei through host conversion mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Effects of different host switching modes on the fitness of Leaperia bancroft

[0016] Under laboratory conditions, Potato Solanum tuberosum potted seedlings (20-25cm) and potato tubers were used to raise Pythysporum hibiscus and Pycoccus amaryllis respectively. After the two kinds of mealybugs develop into female adults, they are ready for use. Two pairs of newly emerged and fully mated Pythias bancrofti (two females and two males) were selected indoors and raised at least 30 generations with Pyenococcus hibiscus as the host. The parasitoid wasps were removed after feeding for 48 hours with T2 host sequence (P. Among them, the bee:scale ratios of A. bancrofti, P. hibiscus and P. amaryllis were 2:20 and 2:15, respectively. After the above parasitic wasps eclosion, the T1 and T2 host sequences obtained by the T1 and T2 hosts, respectively, were inserted into T. bancroft and P. fuso at a ratio of 1:30. The parasitization rate, eclosion rate, female ratio of p...

Embodiment 2

[0021] Example 2 Effects of different host conversion cycles on the parasitism rate and the sex ratio of the population of Leviathan bancroft

[0022] Select T1 host order (Pythococcus lycoccus-Pycoccus lycocili-Pycoccus lycoides) for 1, 2, 3, 4 and 5 cycles of reproduction of the population of Leucopteris bancroft, with a bee:scale ratio of 1:30 The proportion of P. hibiscus was provided as a host for it. Observe and count the total number of Fuso mealybugs parasitized by E. bancroft's each generation and the proportion of female bees in the offspring every day. Each of the above treatments was repeated 3 times, and P. bancrofti, which was eclosion from Pycoccus hibiscus cotton as the host, was used as the control. The indoor breeding conditions were set at 26-28°C, relative humidity at 70-80%, and photoperiod L16:D8.

[0023] Table 2 Effects of different host conversion generations on the parasitism rate and the sex ratio of the population of A. bancrofti

[0024]

[0...

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Abstract

The invention relates to the technical field of indoor breeding of insects, in particular to a method for optimizing the population structure of Aenasius bambawalei through a host conversion mode. The host conversion period specifically comprises the following steps of S1, selecting Aenasius bambawalei PSS-1 breeding multiple generations by taking Phenacococcus solenopsis as a host; S2, providing a conversion host of Phenacoccus solani for the Aenasius bambawalei PSS-1, and after offspring parasitic wasps of the PSS-1 are subjected to eclosion, obtaining the Aenasius bambawalei PSI-1 subjected to primary host conversion; and S3, providing phenacoccus solenopsis for the Aenasius bambawalei PSI-1 after host conversion for parasitism so as to obtain Aenasius bambawalei PSS-2 after secondary host conversion. According to the method, the Aenasius bambawalei carry out parasitism twice on the phenacoccus solenopsis to generate PSS-1 and the PSS-2 and once on the Phenacoccus solani to generate PSI-1, so that one host conversion period is completed; host conversion for a second period (generating PSS-3, PSI-2 and PSS-4) and a third period (generating PSS-5, PSI-3 and PSS-6) continues so as to realize the population optimization of the Aenasius bambawalei. By means of the method, the parasitism rate of the female bees of the Aenasius bambawalei can be remarkably increased, the service life of the female bees and the male bees is prolonged, the proportion of offspring female bees in a population is increased, and the population structure of the Aenasius bambawalei is greatly optimized.

Description

technical field [0001] The invention relates to the technical field of indoor breeding of insects, in particular to a method for optimizing the population structure of Leaperia bancroft by means of host conversion. Background technique [0002] Both Phenacoccus soleopsis and Phenacoccus solani belong to the genus Phenacoccus, and their host spectrums are generally similar. Aenasius bambawalei belongs to the family Hymenoptera, and it is an important companion natural enemy of Fuso cotton mealybug and an obligate parasitoid of its dominant species. Its parasitic rate in the wild is as high as 50% to 62%. Good prospects for biological control applications. At present, a lot of research has been carried out at home and abroad on the use of Aenasiusbambawalei to biologically control Pythococcus hibiscus, but there is no report on the parasitic natural enemies of Pythococcus amaryllis. At the same time, there are few reports on the expansion and utilization of new host resource...

Claims

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Application Information

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IPC IPC(8): A01K67/033
CPCA01K67/033
Inventor 张娟黄俊唐娅媛李明江
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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