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Bagrada Bugs in Cabbage Bagrada Cruciferarum, Bagrada Hilaris Prevention Monitoring Direct Control Direct Control Restrictions

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Bagrada Bugs in Cabbage Bagrada Cruciferarum, Bagrada Hilaris Prevention Monitoring Direct Control Direct Control Restrictions PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST Bagrada bugs in cabbage Bagrada cruciferarum, Bagrada hilaris Prevention Monitoring Direct Control Direct Control Restrictions l Remove old crops and l Monitor the crop once in l Hand pick the bugs. l When using a pesticide or botanical, always wear protective clothing and destroy cabbage-like a week to detect This is particularly follow the instructions on the product label, such as dosage, timing of weeds. This is because Bagrada bugs before important in the early application, pre-harvest interval, max number of sprays, restricted re-entry pests multiply in there they damage stages of the crop. interval. Do not empty into drains and water sources. and re-infect the new l The adult bug is shield – l Kill bugs’ eggs in soil by crop. However, shaped, ½ to 1 cm long tillage of the vegetable l WHO toxicity class II pesticides might not be allowed in local IPM schemes. residues/debris from and 3-4mm broad. Your beds (sun exposure). non-cabbage crops l Always consult recent list of registered pesticides of ZEMA Bagrada bugs (Photo UC IPM) fingers stink when you l Spray plants with a should be left in the field touch them. to improve the soil, and soapy solution against l Pyrethroid insecticides like l WHO toxicity class II (moderately acute prevent water loss. l The upper bug side is Bagrada bugs. The Deltamethrin –based products hazardous); pre-harvest interval (p.h.i.) 7 black with white and soap acts on the skin of (PALI 250WP; DECIS FORTE; days; restricted re-entry interval (r.e.i.) 1 l Intercrop with strong orange markings. bugs like an insecticide. KESHET 2.5EC; and others). day after spray. Max 2 sprays per season. smelling plants such as Flat sprays reaching good Do not spray near water sources. Do not garlic and onion l Damaged leaves have l 7g (1 ½ level tea coverage. Usually applied at spray crops suffering from drought or because they repel the whitish edges. At heavy spoons) of chopped bar 25g per litre water, but double – other stress. Pyrethroid pesticides do not pest. damages white areas all soap to 1 litre water. over the leaves. Spray once a week if check product label. work well above 25 C. Deformed leaves due to bug l Do not rotate with l pest threshold is feeding (Photo J. Palumbo) Chinese cabbage, Take action when more l Thiamethoxam –based l WHO class II (moderately acute than 1 to 2 bugs are reached. Turnip, rape and other 2 pesticides (Renova, and hazardous); p.h.i 14 days; r.e.i. ½ day, Brassicaceae because found per 1 m at early l Do not use washing others). They are usually max 2 sprays per season at min 7 day these are in the same growing stage. powder and detergent applied at 0.3 to 1.5 gram/litre interval. Highly toxic to bees, thus do not family as cabbage and l If the crop is past the paste as they contain depending on product; but spray on flowering crop, and not when can host the bugs. early growing stage, a caustic soda which double check product label. weeds are flowering and not near bee damages plants and l Rotate with crops such higher threshold level of Neonicotinoid group of hives. Spray alone without mixing with any 2 soil. as maize and carrots. 3-4 bugs/m is pesticide. other chemical. considered. l Good spray coverage is needed. Initial white leaf edge damage (Photo J. Palumbo) Zambia CREATED/UPDATED: July 2015 AUTHOR(S): Chanda Bwalya (Ministry of Agriculture and Livestock, Zambia), email : [email protected] EDITED BY: Plantwise LOSE LESS, FEED MORE Plantwise is a CABI-led global initiative www.plantwise.org.
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