A kind of artificial feed of beet armyworm, its preparation and feeding method

Abstract

The invention relates to an artificial feed for asparagus caterpillar, preparation of the artificial feed and a feeding method, and belongs to the field of insect feeds. The artificial feed for asparagus caterpillar comprises the following components: wheat bran, chenopodium album powder, corn flour, ripe soybean powder, yeast powder, agar powder, distilled water, cholesterol, soybean edible oil, ascorbic acid, methyl parahydroxybenzoats and sorbic acid. Raw materials used for the feed are easy to obtain; the preparation technology is simple; the cost is relatively low; the guarantee period is relatively long (6 months); chenopodium album can reduce the viscosity of the feed, enhance the survival rate and percentage of pupation of larvae, can reduce the abnormal pupa rate, and can provide various vitamins required for the development of larva, so that the fed asparagus caterpillar has the average pupal weight of 111.8mg, has the average moth weight of 100.4mg, has the larva survival rate of 91%, and has the eclosion rate of 98%; the pupas have strong vitality, and can be stored in a refrigerator with the temperature of 5 DEG C for 7 days; the feed is relatively good in feeding effect and achieves the aim of long-term large-scale continuous rearing.

Description

technical field [0001] The invention relates to insect feed and feeding technology, in particular to artificial feed for beet armyworm, its preparation method and feeding method using the feed. Background technique [0002] Beet armyworm spodoptera exigua It belongs to Lepidoptera of Lepidoptera and Noctuidae of family Noctuidae. It is a kind of pest with miscellaneous feeding habits and strong drug resistance, which often poses a serious threat to agricultural production and economy. In my country, before the 1980s, the beet armyworm mainly caused damage to Beijing, Hebei, Henan, Shandong and Shaanxi. Although it was distributed in the northeast, northwest and the Yangtze River Basin, the damage was not serious. Since the mid-to-late 1980s, the area infested by beet armyworm has gradually expanded, the scope of damage has become larger and larger, and the economic losses caused have become more and more serious (Yu Yousen et al., 1989; Jiang Xingfu, 1998; Song Guochun, 19...

AI Technical Summary

Problems solved by technology

Although the artificial feed reported by the public is effective, it generally has the following disadvantages: (1) the feed viscosity is large, it is easy to produce mildew spots, and the feed needs to be replaced many times, which is time-consuming and labor-intensive, and it is easy to cause the survival rate of larvae and the decline of pupation rate. High pupal rate

(2) Nutrition is not balanced enough, adults are prone to deformed wings, and the population will degenerate after multiple generations of feeding

(3) Using manual stirring of the feed mixture is not only laborious but also uneven, so that the nutrients cannot be fully mixed, and the growth of the larvae is uneven.

The above-mentioned feeding method has the following disadvantages: (1) feeding with an insect tank and flat-bottomed glass tubes causes the feed to be easily air-dried, and the feed needs to be replaced many times, and one flat-bottomed glass tube can only feed two ends, and the cleaning and sterilization after use The work is also quite huge, so it is time-consuming and labor-intensive, and it is not suitable for large-scale breeding

(2) Because the breeding temperature of beet armyworm is relatively high, and the humidity has a great influence on beet armyworm, when using convolvulus leaves to raise, the leaves are easy to wilt and water out, thus drowning the larvae. In the worm box, there will be too much humidity due to too many leaf wounds. In addition to easily drowning larvae, excessive humidity will also easily lead to bacterial mold virus infection

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