Natural control of Helicoverpa armigera in smallholder crops in East Africa
By: Henk van den Berg
Contributors: Landbouwuniversiteit Wageningen
Publisher: [s.n.]
Published: 1993
Place of publication: Wageningen
Language: eng
Number of pages: 233
Notes: Thesis (doctoral)--Landbouwuniversiteit te Wageningen, 1993.

Includes bibliographical references (p. [221]-232)

Summary in Dutch.