An Improved Medium for Rearing Red-Banded Leaf Roller

1964 ◽  
Vol 57 (2) ◽  
pp. 296-297 ◽  
Author(s):  
R. E. Redeern
Keyword(s):  
Leaf Roller

The Omnivorous Leaf Roller, Platynota stultana Wlshm., on Cotton in Southern California: Damage and Control12

1957 ◽  
Vol 50 (1) ◽  
pp. 59-64
Author(s):  
E. L. Atkins ◽  
M. H. Frost ◽  
A. S. Deal ◽  
H. T. Reynolds
Keyword(s):  
Southern California ◽  
Leaf Roller ◽  
Platynota Stultana

scholarly journals Ectoparasite Habrobracon Hebetor Say Is an Efficient Biological Control Agent of Lepidopteran Pests

2021 ◽  
Vol 285 ◽  
pp. 03010
Author(s):  
Irina Agasyeva
Keyword(s):  
Plant Protection ◽  
Biological Control Agent ◽  
Mass Rearing ◽  
Control Agent ◽  
Vegetable Crops ◽  
Corn Borer ◽  
Moth Bean ◽  
Habrobracon Hebetor ◽  
Leaf Roller ◽  
Pod Borer

Ectoparasite Habrobracon hebetor Say is one of the most widely used biological controllers in biological plant protection against a number of harmful lepidopterans, including especially dangerous pests of corn, soy, fruit and vegetable crops. As a result of research conducted in 2017, food specialization and parasitic activity of three different populations of H.hebetor were studied. Two races have been identified for mass rearing and application: pyralid and leaf roller (against corn moth, bean pod borer, apple and plum moths), and pyralid owl-moth (against cotton moth, corn borer, bean pod borer and boxwood moth). As a result of studies of biological features and trophic needs, it has been determined that caterpillars of mill moth (Ephestia cuhniellia Zella) should be used as a host insect for laboratory cultivation of the stock population of the Habrobracon pyralid and leaf roller race (race No. 1). For the introduced from South Kazakhstan the H.hebetor pyralid and noctuid race the most productive rearing is on the caterpillars of large bee moth (Galleria mellonela L.). Optimal temperature for rearing of both races is 26-28 ° C, relative air humidity is 70% and photoperiod is not less than 16 hours. It has been noticed that before laying eggs on the host’s caterpillars, the Habrobracon female preliminarily paralyzes the victim, piercing the sheath with ovipositor. As a result, the caterpillar stops eating and is immobilized. In 3-4 days larvae hatch out of the laid on the caterpillar eggs. The larvae feed on the contents of the caterpillars for 4-5 days, then pupate and after 6-8 days an adult insect leaves the cocoon. The development of one generation lasts 13-16 days, one cocoon includes one parasite. 1,000 large bee moth caterpillars used for infection provide on average 5.8-6.0 thousand cocoons, of which an average of 4.5-4.7 thousand parasites fly out.

scholarly journals Efficacy of Beauveria bassiana against the cotton leaf roller, Haritalodes (Syllepte) derogata (Fabricius, 1775) (Lepidoptera: Crambidae) under laboratory conditions.

2021 ◽  
Vol 157 ◽  
pp. 16254-16266
Author(s):  
Dannon H. Fabrice ◽  
Douro Kpindou O. Kobi ◽  
Toffa Mehinto Joelle ◽  
Zantchedji D. M. Désiré ◽  
Zinsou A. Valerien ◽  
...  
Keyword(s):  
Beauveria Bassiana ◽  
Field Experiments ◽  
Good Alternative ◽  
Lethal Concentration ◽  
High Yield ◽  
Cotton Leaf ◽  
Plant Laboratory ◽  
Leaf Roller ◽  
Synthetic Pesticides ◽  
Environmentally Friendly Method

Objective: The leaf-roller caterpillar Haritalodes (=Syllepte) derogata (Fabricius, 1775) (Lepidoptera: Crambidae) induces high yield losses by damaging cotton leaves and reducing the photosynthetic activity of the plant. Laboratory bioassays were carried to evaluate the effect of Beauveria bassiana on the survival of H. derogata larvae. Methodology and results: In the first trial, screening of thirteen B. bassiana isolates was performed on third larval instars at 107 conidia.mL-1 . In the second trial, effects of five concentrations (105 to 109 conidia.mL-1 ) of the three best isolates of the fungus were tested. Conidia suspension was applied on each larva topically. Germination rates of conidia used varied between 90.2% to 95.7%, 24 hours after incubation. Five isolates were found to be the most promising namely Bb116, Bb3, Bb11, Bb6 and Bb115. In the second bioassay, caterpillar mortality increased with fungal concentration. Lethal Concentration (LC50) was estimated to 1.18x1015 conidia.mL-1 , 1.75x1013 conidia.mL-1 , 1.75x1013 conidia.mL-1 , 9 days after inoculation for Bb3, Bb11 and Bb115, respectively. Conclusion and application of results: The use of B. bassiana as a biopesticide against H. derogata could be a good alternative method to control the pest. It is an environmentally friendly method with less side effects compared to the application of synthetic pesticides on cotton. This method could be tested in future station and field experiments. Keywords: Cotton, Integrated pest management, Haritalodes (=Syllepte) derogata, Beauveria bassiana, Lethal Concentration.

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