The Green Clover Worm (Plathypena Scabra Fabr.) as a Pest on Soy Beans

Sherman, Franklin

doi:10.1093/jee/13.3.295

Cited by 6 publications

(13 citation statements)

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“…In India the growing period of soybean is generally shorter than in the New World, and plants do not get sufficient time to compensate for the foliage loss; thus, this factor may be responsible for the different results. Sherman (1920) and Bhattacharjee and Ghude (1985) also hold the same view.…”

Section: Effect Of Larval Density On Grain Yieldmentioning

confidence: 71%

Economic threshold level for green semilooper,Chrysodeixis acuta(Walker) on soybean

Singh

1991

Tropical Pest Management

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The economic threshold level for the green semilooper, Chrysodeixis acuta (Walker) (Lepidoptera: Noctuidae) was determined on soybean cultivar JS 72-44 during 1986 in Madhya Pradesh, India. With an increase of every 1 larva/mrl (meter row length) at 45 d.a.e. (days after emergence) (flower initiation stage) and at 66 d.a.e. (pod filling stage), there were reductions of 593 and 662 kg/ha in grain yield, respectively. The yield loss caused by 3 to 18 larvae/mrl at flower initiation ranged from 7.29% to 45.51%, and that at pod filling ranged 9.43% to 46.49%. The control measures should be adopted at economic threshold level of three larvae and 2 larvae/mrl at flower initiation and pod filling stage of the crop, respectively.

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Section: Effect Of Larval Density On Grain Yieldmentioning

confidence: 71%

Economic threshold level for green semilooper,Chrysodeixis acuta(Walker) on soybean

Singh

1991

Tropical Pest Management

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“…The earliest distribution of scabra was given by Walker 1859 In the spring, when oviposition begins, eggs are laid singly on available host crops (Hill 1918(Hill , 1925Frost 1955;Laster 1962;Pedigo et al 1973). On alfalfa, the eggs are laid on the underside of leaf lets (Hill 1918(Hill , 1925, but later in the season, when soybean leaflets are available for oviposition, no preference is shown for either sur face (Sherman 1920, Sherman and Leiby 1920, and Pedigo 1971. Chittenden 1901;Britton 1909Britton , 1920Hill 1918Hill , 1925Sherman and Leiby 1920;Balduf 1923;and Pedigo et al 1973).…”

Section: A Notable Exception Is the Collection Of A Single Male Adultmentioning

confidence: 99%

“…Eggs begin hatching in ca. 4-6 days (Coquillett 1881; Hill 1918Hill , 1925Sherman 1920, Sherman andLeiby 1920;Smith and Franklin 1961;and Pedigo et al 1973) or as much as 9.4 days in the spring (Hill 1925). Eclosion from the egg was described by Hill (1925) and Pedigo et al (1973).…”

Section: A Notable Exception Is the Collection Of A Single Male Adultmentioning

confidence: 99%

“…long (Hill 1918, Sherman andLeiby 1920), feeds on the underside of the leaf lets. Young larvae, stages 1-3, can often be seen hanging from the leaflet by a silken thread (Britton 1920, Sherman 1920, Hawley 1922, and Pedigo et al 1973).…”

Section: A Notable Exception Is the Collection Of A Single Male Adultmentioning

confidence: 99%

“…Larval stages 1 and 2 usually eat all but the upper epidermis of the leaf, leaving a window-like appearance on the leaves (Pedigo et al 1973). Sherman (1920) reported that, within 3 days, the larvae eat through soybean leaves. Hill (1925) stated that, on alfalfa, this type of feeding is characteristic of the first 3 instars (7.66 days).…”

Section: A Notable Exception Is the Collection Of A Single Male Adultmentioning

confidence: 99%

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Biology and population ecology of parasites of the green cloverworm, Plathypena scabra (F.) (Lepidoptera: Noctuidae) in Iowa

Lentz

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Iowa during 1970 and 1971 with the following objectives: 1) To identify the parasites of the green cloverworm. 2) To determine the distribution and seasonal occurrence of these parasites. 3) To determine the incidence of parasitism, both collectively and individually, by these parasites through space and time. 4) To determine various host-parasite relationships, i.e., stage of host attacked, whether parasitism is solitary or gregarious, and host stages in which parasite development occurs. 5) To identify the hyperparasites associated with the green cloverworm. 6) To determine the incidence of parasitism, distribution, sea sonal occurrence and host associations of these hyperparasites. 7) To determine characteristics of green cloverworm larval popula tions, i.e., relative abundance, adult sex ratio, incidence of disease and other mortality factors. An egg parasite study was undertaken with the following objectives: 1) To identify egg parasites of the green cloverworm. 2) To determine the incidence of egg parasitism and its possible role in population regulation. An intensive sampling program was conducted near Ames in 1971 with the following objectives: 1) To determine, on a weekly basis, any changes in the incidence of parasitism by individual and groups of parasite species within field populations of green cloverworms. a distance of 50 to 100 yd and then quickly alight (Hill 1925). Feral adults have been reported feeding on the nectar of blossoms of host plants (Hill 1925) and cultured moths on molasses (Sherman 1920) and water or 1% sugar solution (Pedigo et al. 1973). Mean longevity of the adult stage has been reported as 7.3 days (Hill 1925); 9.0 days (Smith and Franklin 1961); 7.9-11.1 days (Stone and Pedigo 1972), and 22.4 days (Pedigo et al. 1973). These latter workers found that females live significantly longer under greenhouse conditions than do males. Like many other noctuids, moth activity begins at dusk and con tinues into the night. Pedigo et al. (1973) observed flight to begin at ca. 3 ft-c of light and increased 3-fold (15-52 moths flying) at < 1 ft-c, during a 10-min period. Moth activity, as measured by blacklight trap catches, was shown by Pedigo et al. (1973) to occur between 8:00 PM and 2:00 AM CDT. The use of light traps to measure seasonal moth activity in Ontario, Canada, was reported by Stirrett (1931). No moths were caught in the trap between June 15 and 30, but were caught, however, between July 5 and Oct, 3 with peak moth activity between July 13 and Aug. 3. In Min nesota, moth activity was measured and reported by Knutson (1944). He collected moths as early as the 1st wk of May with heaviest flights occurring the last 3 wk of July. Pedigo et al. (1973), in Iowa, also found heaviest numbers occurring in July but reported numbers to drop substantially on Sept. 11, These latter workers reported catches to be quite erratic, though, and found no clear generation or seasonal pattern.

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Sampling Parasitoids of Soybean Insect Pests

Marston¹

1980

Springer Series in Experimental Entomology

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The Green Clover Worm (Plathypena Scabra Fabr.) as a Pest on Soy Beans

Cited by 6 publications

References 0 publications

Economic threshold level for green semilooper,Chrysodeixis acuta(Walker) on soybean

Economic threshold level for green semilooper,Chrysodeixis acuta(Walker) on soybean

Biology and population ecology of parasites of the green cloverworm, Plathypena scabra (F.) (Lepidoptera: Noctuidae) in Iowa

Sampling Parasitoids of Soybean Insect Pests

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